Brien heads of household in the 1911 census


Counties, DEDs and heads of households

Antrim: Clogh: 1
Antrim: Duncairn: 1
Carlow: Bagenalstown Urban: 1
Carlow: Ballinacarrig: 1
Carlow: Ballon: 2
Carlow: Ballyellen: 2
Carlow: Borris: 2
Carlow: Carlow Urban: 1
Carlow: Clogrennan: 2
Carlow: Clonmore: 3
Carlow: Corries: 1
Carlow: Cranemore: 3
Carlow: Fennagh: 3
Carlow: Garryhill: 2
Carlow: Graigue Urban: 3
Carlow: Hacketstown: 3
Carlow: Kellistown: 1
Carlow: Kilbride: 1
Carlow: Killedmond: 3
Carlow: Leighlinbridge: 1
Carlow: Myshall: 1
Carlow: Nurney: 1
Carlow: Rathanna: 1
Carlow: Rathrush: 1
Carlow: Rathvilly: 4
Carlow: Shangarry: 2
Carlow: Ticknock: 1
Carlow: Tullow Rural: 3
Carlow: Tullow Urban: 1
Carlow: Tullowbeg: 1
Cavan: Milltown: 2
Clare: Miltownmalbay: 1
Cork: Abbeymahon: 5
Cork: Aghadown North: 1
Cork: Aghadown South: 2
Cork: Aghern: 1
Cork: Aghinagh: 1
Cork: Ahil: 1
Cork: Allow: 1
Cork: Argideen: 1
Cork: Aultagh: 1
Cork: Ballincollig: 1
Cork: Ballinspittle: 1
Cork: Ballyarthur: 1
Cork: Ballybane: 3
Cork: Ballycottin: 1
Cork: Ballydehob: 2
Cork: Ballygroman: 1
Cork: Ballyhoolahan: 1
Cork: Ballymackean: 1
Cork: Ballymodan: 1
Cork: Bantry Urban: 6
Cork: Blackpool: 1
Cork: Boulteen: 3
Cork: Bredagh: 7
Cork: Brinny: 1
Cork: Butlerstown: 1
Cork: Caherlag: 1
Cork: Cape Clear: 1
Cork: Carregboy: 1
Cork: Carrig: 1
Cork: Carrigbaun: 1
Cork: Castlehaven: 5
Cork: Castlehaven South: 1
Cork: Castlelyons: 1
Cork: Castlemartyr: 1
Cork: Castletown: 1
Cork: Castleventry: 1
Cork: Charleville: 2
Cork: Clonakilty: 2
Cork: Clonakilty Urban: 6
Cork: Cloonkeen: 6
Cork: Cloyne: 1
Cork: Coolcraheen: 1
Cork: Coolmountain: 1
Cork: Cork No. 4 Urban (part of): 2
Cork: Cork No. 5 Urban: 4
Cork: Cork No. 7 Urban: 1
Cork: Corkbeg: 1
Cork: Coulagh: 1
Cork: Courtmacsherry: 5
Cork: Curraglass: 1
Cork: Dangan: 2
Cork: Drinagh: 6
Cork: Dromdaleague North: 4
Cork: Dromdaleague South: 2
Cork: Dunbeacon: 1
Cork: Dunmanway South: 1
Cork: Durrus East: 2
Cork: Durrus West: 1
Cork: Firmount: 1
Cork: Garranes: 4
Cork: Glanlough: 4
Cork: Glengarriff: 3
Cork: Gortnascreeny: 5
Cork: Greenane: 1
Cork: Ightermurragh: 2
Cork: Inishkenny: 1
Cork: Kanturk: 3
Cork: Kealkill: 2
Cork: Kilcaskan: 5
Cork: Kilcor: 1
Cork: Kilfaughnabeg: 1
Cork: Killeenleagh: 1
Cork: Killoe: 1
Cork: Kilmaloda East: 3
Cork: Kilmaloda West: 1
Cork: Kilnagross: 1
Cork: Kilpatrick: 1
Cork: Kinsale Urban: 1
Cork: Kinure: 1
Cork: Knockakagh: 6
Cork: Knockantota: 1
Cork: Knockmourne: 1
Cork: Knocknagree: 1
Cork: Knocks: 3
Cork: Liscarroll: 1
Cork: Liscleary: 1
Cork: Lisgoold: 1
Cork: Lowertown: 1
Cork: Manch: 4
Cork: Matehy: 1
Cork: Mealagh: 1
Cork: Milane: 2
Cork: Moviddy: 2
Cork: Myross: 3
Cork: Queenstown Rural (part of): 1
Cork: Rathbarry: 1
Cork: Rathcooney: 1
Cork: Rosscarbery: 5
Cork: Rossmore: 1
Cork: Scart: 1
Cork: Sheepshead: 1
Cork: Shreelane: 6
Cork: Skibbereen Rural: 3
Cork: Skibbereen Urban: 5
Cork: Skull: 3
Cork: St. Mary's: 1
Cork: Templeomalus: 3
Cork: Toormore: 1
Cork: Tullagh: 1
Cork: Woodfort: 1
Cork: Youghal Rural: 1
Cork: Youghal Urban: 3
Down: Bryansford: 1
Down: Downpatrick: 1
Down: Killough: 1
Down: Ormeau: 1
Dublin: Arran Quay: 4
Dublin: Balbriggan Urban, Part of: 1
Dublin: Ballybrack: 2
Dublin: Blackrock No. 1: 1
Dublin: Castleknock: 4
Dublin: Clondalkin: 3
Dublin: Clonmethan: 3
Dublin: Clonsilla: 1
Dublin: Coolock: 4
Dublin: Coolock, Part of: 1
Dublin: Donabate: 1
Dublin: Drumcondra Rural: 1
Dublin: Drumcondra Rural, Part of: 2
Dublin: Finglas: 3
Dublin: Fitzwilliam: 3
Dublin: Garristown: 3
Dublin: Glasnevin: 1
Dublin: Glencullen: 2
Dublin: Holmpatrick: 1
Dublin: Holywood: 1
Dublin: Howth: 3
Dublin: Inns Quay: 4
Dublin: Killiney: 1
Dublin: Kilsallaghan: 1
Dublin: Kingstown No. 2: 2
Dublin: Kingstown No. 3: 1
Dublin: Lucan: 2
Dublin: Lusk: 2
Dublin: Mansion House: 2
Dublin: Merchant's Quay: 9
Dublin: Merchants Quay (part of): 2
Dublin: Mountjoy: 7
Dublin: New Kilmainham: 1
Dublin: Newcastle: 2
Dublin: North City: 2
Dublin: North Dock: 4
Dublin: Palmerstown: 3
Dublin: Pembroke East: 1
Dublin: Pembroke West: 2
Dublin: Rathfarnham: 4
Dublin: Rathmichael: 2
Dublin: Rathmines & Rathgar West: 2
Dublin: Rotunda: 2
Dublin: Rush: 2
Dublin: Saggart: 3
Dublin: South City: 1
Dublin: South Dock: 6
Dublin: Stillorgan: 3
Dublin: Swords East: 1
Dublin: Tallagh: 2
Dublin: Terenure: 6
Dublin: Usher's Quay: 10
Dublin: Whitechurch: 1
Dublin: Wood Quay: 2
Dublin: Wood Quay (part of): 1
Fermanagh: Bellanamallard: 1
Fermanagh: Ely: 1
Fermanagh: Newporton: 4
Fermanagh: Rockfield or Killaclean: 1
Galway: Abbeygormacan: 2
Galway: Annagh: 1
Galway: Belclare: 1
Galway: Boyounagh: 2
Galway: Bracklagh: 1
Galway: Bullaun: 1
Galway: Caltra: 1
Galway: Castleffrench: 1
Galway: Clonbrock: 1
Galway: Derrew: 2
Galway: Dunmore, North: 1
Galway: Killaan: 1
Galway: Killeroran: 1
Galway: Killian: 2
Galway: Killimor: 2
Galway: Killure: 2
Galway: Kilreekill: 3
Galway: Kiltormer: 1
Galway: Kylemore: 1
Galway: Laurencetown: 1
Galway: Moat: 1
Galway: Pallas: 2
Galway: Raheen: 1
Kerry: Ardea: 2
Kerry: Caher: 1
Kerry: Caragh: 1
Kerry: Coom: 1
Kerry: Doon: 1
Kerry: Dromore: 1
Kerry: Dunloe: 1
Kerry: Flesk: 1
Kerry: Glanmore: 1
Kerry: Kilbonane: 2
Kerry: Kilgarrylander: 2
Kerry: Kilgarvan: 1
Kerry: Kilgobnet: 2
Kerry: Killarney Urban: 1
Kerry: Killeentierna: 1
Kerry: Killorglin: 1
Kerry: Kilnanare: 1
Kerry: Lack: 1
Kerry: Millbrook: 1
Kerry: Minard: 1
Kerry: Portmagee: 3
Kerry: Tralee Urban (part of): 2
Kerry: Tubrid: 1
Kildare: Athy East, Urban: 1
Kildare: Athy Rural: 1
Kildare: Ballyshannon: 1
Kildare: Balraheen: 3
Kildare: Belan: 1
Kildare: Bodenstown: 1
Kildare: Burtown: 1
Kildare: Caragh: 1
Kildare: Carnalway: 3
Kildare: Carrigeen: 2
Kildare: Castledermot: 3
Kildare: Celbridge: 3
Kildare: Churchtown: 1
Kildare: Clane: 3
Kildare: Cloncurry: 1
Kildare: Donaghcumper: 2
Kildare: Donore: 1
Kildare: Downings: 1
Kildare: Dunmanoge: 1
Kildare: Gilltown: 5
Kildare: Graney: 1
Kildare: Grangemellon: 1
Kildare: Johnstown: 1
Kildare: Kilcock: 5
Kildare: Kilcullen: 2
Kildare: Kildangan: 1
Kildare: Kildare: 1
Kildare: Kilkea: 2
Kildare: Killashee: 2
Kildare: Kilmeage, North: 1
Kildare: Leixlip: 2
Kildare: Monasterevin: 2
Kildare: Naas Urban: 5
Kildare: Narragh More: 1
Kildare: Robertstown: 2
Kildare: Skerries: 2
Kildare: Timahoe North: 3
Kildare: Usk: 1
Kilkenny: Aglish: 1
Kilkenny: Aughaviller: 1
Kilkenny: Ballybeagh: 1
Kilkenny: Bramblestown: 1
Kilkenny: Brownsford: 1
Kilkenny: Callan Rural: 2
Kilkenny: Callan Urban: 1
Kilkenny: Castlebanny: 1
Kilkenny: Castlecomer: 1
Kilkenny: Coblaghmore: 2
Kilkenny: Dinnamaggan: 1
Kilkenny: Dunkitt: 1
Kilkenny: Freaghana: 2
Kilkenny: Galmoy: 1
Kilkenny: Graiguemanagh: 1
Kilkenny: Grange: 1
Kilkenny: Jerpoint Church: 4
Kilkenny: Kilcolumb: 1
Kilkenny: Kilkenny No. 1 Urban: 4
Kilkenny: Kilkenny Rural: 1
Kilkenny: Killamery: 2
Kilkenny: Kilmaganny: 2
Kilkenny: Mothell: 1
Kilkenny: Pollrone: 9
Kilkenny: Powerstown: 2
Kilkenny: Rathpatrick: 2
Kilkenny: Rosbercon Rural: 1
Kilkenny: Rower: 2
Kilkenny: Scotsborough Rural: 1
Kilkenny: Shankill: 3
Kilkenny: Tullaghanbrogue: 1
Kilkenny: Tullaghought: 1
Kilkenny: Urlingford: 1
Kilkenny: Whitechurch: 1
King's Co.: Ballycommon: 1
King's Co.: Birr Urban: 3
King's Co.: Cappancar: 4
King's Co.: Clara: 3
King's Co.: Croghan: 3
King's Co.: Derrinboy: 1
King's Co.: Derrycooley: 1
King's Co.: Doon: 1
King's Co.: Durrow: 1
King's Co.: Ettagh: 1
King's Co.: Geashill: 3
King's Co.: Killeigh: 2
King's Co.: Killoughy: 1
King's Co.: Knockbarron: 1
King's Co.: Monasteroris: 1
King's Co.: Mounterin: 1
King's Co.: Mountheaton: 2
King's Co.: Philipstown: 4
King's Co.: Rahan: 1
King's Co.: Rathrobin: 1
King's Co.: Silverbrook: 2
King's Co.: Srah: 4
King's Co.: Tianycross: 2
King's Co.: Tinamuck: 2
King's Co.: Tullamore Rural: 1
King's Co.: Tullamore Urban: 3
Leitrim: Ballinamore: 1
Leitrim: Carrick-on-Shannon: 1
Leitrim: Drumsna: 6
Leitrim: Leitrim: 1
Limerick: Ballylanders: 1
Limerick: Griston: 1
Limerick: Limerick No. 1 Urban: 1
Limerick: Templeglentan: 1
Louth: Dundalk Urban No. 4: 1
Louth: Fair Gate: 1
Louth: Monasterboice: 1
Louth: St. Peter's (part of): 1
Louth: St. Peters (part of): 1
Louth: West Gate: 5
Mayo: Ardnaree, South Urban: 1
Mayo: Crossmolina North: 1
Mayo: Derry: 2
Mayo: Kilcommon: 1
Meath: Ardbraccan: 2
Meath: Ardcath: 3
Meath: Ardnamullan: 1
Meath: Ballyconnell: 1
Meath: Castletown: 3
Meath: Donaghpatrick: 4
Meath: Duleek: 5
Meath: Dunboyne: 1
Meath: Dunshaughlin: 2
Meath: Galtrim: 1
Meath: Grangegeeth: 2
Meath: Grennanstown: 2
Meath: Kentstown: 1
Meath: Kilbrew: 2
Meath: Kildalkey: 4
Meath: Killeen: 1
Meath: Kilmainham: 1
Meath: Kilmessan: 3
Meath: Kilmore: 3
Meath: Laracor: 4
Meath: Loughan: 1
Meath: Martry: 3
Meath: Mellifont: 1
Meath: Navan Rural: 5
Meath: Navan Urban: 7
Meath: Newcastle: 2
Meath: Rathkenny: 1
Meath: Rathmolyon: 1
Meath: Ratoath: 4
Meath: Rodanstown: 1
Meath: Skreen: 3
Meath: Slane: 1
Meath: St. Mary's: 2
Meath: Stackallan: 5
Meath: Tara: 2
Meath: Teltown: 2
Meath: Trim Rural: 3
Meath: Trohanny: 1
Monaghan: Castleshane: 1
Queen's Co.: Aghmacart: 1
Queen's Co.: Ardough: 1
Queen's Co.: Ballyadams: 1
Queen's Co.: Ballyfin: 1
Queen's Co.: Ballylehane: 1
Queen's Co.: Barrowhouse: 1
Queen's Co.: Borris: 1
Queen's Co.: Borris in Ossory: 1
Queen's Co.: Castletown: 1
Queen's Co.: Clonaslee: 3
Queen's Co.: Clonkeen: 1
Queen's Co.: Donore: 1
Queen's Co.: Jamestown: 1
Queen's Co.: Maryborough Rural: 2
Queen's Co.: Maryborough Urban: 1
Queen's Co.: Marymount: 1
Queen's Co.: Mountmellick Urban: 3
Queen's Co.: Portarlington South: 1
Queen's Co.: Rearymore: 3
Queen's Co.: Rosenallis: 1
Queen's Co.: Stradbally: 2
Queen's Co.: Tankardstown: 1
Roscommon: Ballinasloe Urban: 4
Roscommon: Ballynamona: 1
Roscommon: Barrymore: 3
Roscommon: Castlereagh: 1
Roscommon: Cloonburren: 1
Roscommon: Drumdaff: 1
Roscommon: Kilcar: 2
Roscommon: Thomastown: 1
Roscommon: Turrock: 1
Sligo: Easky West: 1
Tipperary: Aghnameadle: 3
Tipperary: Aglishcloghane: 1
Tipperary: Ballingarry: 2
Tipperary: Ballygriffin: 1
Tipperary: Ballymackey: 1
Tipperary: Borrisoleigh: 1
Tipperary: Bourney East: 1
Tipperary: Caher: 1
Tipperary: Cappagh: 1
Tipperary: Carrick-on-Suir (Urban): 3
Tipperary: Carrickbeg Urban: 1
Tipperary: Cashel Urban: 6
Tipperary: Castletown: 1
Tipperary: Cloneen: 2
Tipperary: Clonmel East Urban: 2
Tipperary: Cooleagh: 1
Tipperary: Curraheen: 2
Tipperary: Derrygrath: 1
Tipperary: Drom: 2
Tipperary: Farranrory: 2
Tipperary: Finnoe: 1
Tipperary: Glenkeen: 1
Tipperary: Golden: 1
Tipperary: Graystown: 1
Tipperary: Inch: 1
Tipperary: Kilbarron: 2
Tipperary: Kilcoran: 1
Tipperary: Kilfeakle: 1
Tipperary: Killadriffe: 1
Tipperary: Killavinoge: 2
Tipperary: Killea: 1
Tipperary: Kilmucklin: 2
Tipperary: Kilpatrick: 1
Tipperary: Kilrush: 2
Tipperary: Kilvemnon: 1
Tipperary: Knigh: 2
Tipperary: Knockgraffon: 1
Tipperary: Littleton: 1
Tipperary: Loughmoe: 3
Tipperary: Magorban: 1
Tipperary: Modeshil: 1
Tipperary: Nenagh East Urban: 1
Tipperary: Nenagh West Urban: 3
Tipperary: Oughterleague: 3
Tipperary: Peppardstown: 1
Tipperary: Rahelty: 1
Tipperary: Rathcabban: 1
Tipperary: Rathlynin: 1
Tipperary: Roscrea: 3
Tipperary: Templemore Urban: 1
Tipperary: Templeneiry: 1
Tipperary: Thomastown: 2
Tipperary: Thurles Rural: 1
Tipperary: Thurles Urban: 2
Tipperary: Tipperary E. Urban: 3
Tipperary: Uskane: 1
Tipperary: Youghalarra: 2
Tyrone: Trillick: 2
Tyrone: Tullyclunagh: 1
Waterford: Ardmore: 3
Waterford: Ballydurn: 2
Waterford: Ballyin: 2
Waterford: Ballylaneen: 1
Waterford: Ballymacarbry: 1
Waterford: Ballysaggartmore: 1
Waterford: Carrigbeg Rural: 1
Waterford: Carrigcastle: 1
Waterford: Clashmore: 3
Waterford: Clonea: 1
Waterford: Dungarvan No. 1 Urban: 4
Waterford: Dungarvan No. 2 Urban: 2
Waterford: Dungarvan Rural: 1
Waterford: Dunhill: 1
Waterford: Faithlegg: 1
Waterford: Fenoagh: 1
Waterford: Fox's Castle: 1
Waterford: Gortnapeaky: 1
Waterford: Keereen: 1
Waterford: Kilmacthomas: 4
Waterford: Kilmeaden: 1
Waterford: Kinsalebeg: 1
Waterford: Lismore: 1
Waterford: Mocollop: 1
Waterford: Mothel: 2
Waterford: Mountstuart: 1
Waterford: Newcastle: 1
Waterford: Newtown: 1
Waterford: No. 1 Urban: 1
Waterford: Pembrokestown: 1
Waterford: Portlaw: 2
Waterford: Rathgomuck: 1
Waterford: Reisk: 1
Waterford: Ross: 1
Waterford: Tallow: 3
Waterford: Tramore: 3
Waterford: Waterford No. 3 Urban: 2
Waterford: Waterford No. 4 Urban: 2
Waterford: Waterford No. 4 Urban (part of): 4
Westmeath: Ardnaglew: 3
Westmeath: Ardnagragh: 1
Westmeath: Auburn: 4
Westmeath: Castle: 2
Westmeath: Castletown: 1
Westmeath: Drumraney: 1
Westmeath: Enniscoffey: 2
Westmeath: Glasson: 1
Westmeath: Greenpark: 1
Westmeath: Huntingdon: 1
Westmeath: Kilcumreragh: 2
Westmeath: Killucan: 1
Westmeath: Moate: 1
Westmeath: Moydrum: 1
Westmeath: Mullingar: 1
Westmeath: Rahugh: 1
Westmeath: Tubbrit: 2
Wexford: Ardamine: 2
Wexford: Ardcavan: 2
Wexford: Ardcolm: 1
Wexford: Artramon: 2
Wexford: Balloughter: 2
Wexford: Ballycanew: 2
Wexford: Ballycarney: 1
Wexford: Ballygarrett: 1
Wexford: Ballyhack: 1
Wexford: Ballyhoge: 1
Wexford: Ballyhuskard: 1
Wexford: Ballynestragh: 1
Wexford: Ballyvaldon: 5
Wexford: Bannow: 1
Wexford: Barronstown: 1
Wexford: Bolaboy: 6
Wexford: Bree: 4
Wexford: Cahore: 1
Wexford: Carrick: 1
Wexford: Castle Ellis: 5
Wexford: Castle Talbot: 6
Wexford: Clonroche: 2
Wexford: Courtown: 2
Wexford: Duncormick: 1
Wexford: Edermine: 9
Wexford: Enniscorthy Rural: 5
Wexford: Enniscorthy Urban: 14
Wexford: Fethard: 2
Wexford: Ford: 5
Wexford: Gorey Urban: 1
Wexford: Kilcormick: 1
Wexford: Kilcowan: 1
Wexford: Kilgarvan: 1
Wexford: Kilgorman: 3
Wexford: Killann: 3
Wexford: Killincooly: 2
Wexford: Killmallock: 1
Wexford: Killurin: 1
Wexford: Kilmokea: 2
Wexford: Kilrush: 2
Wexford: Kilscoran: 2
Wexford: Marshalstown: 3
Wexford: Mayglass: 1
Wexford: Monamolin: 3
Wexford: Moyacomb: 1
Wexford: New Ross: 1
Wexford: New Ross, Urban: 5
Wexford: Newtownbarry: 1
Wexford: Rathaspick: 1
Wexford: Rosslare: 1
Wexford: Taghmon: 1
Wexford: Templeludigan: 1
Wexford: Templetown: 2
Wexford: The Harrow: 3
Wexford: The Leap: 2
Wexford: Tinnacross: 3
Wexford: Wells: 2
Wexford: Wexford No. 2 Urban: 5
Wexford: Wexford No. 3 Urban: 4
Wexford: Wexford Rural: 2
Wexford: Wexford Urban No 1: 7
Wexford: Whitechurch: 4
Wicklow: Altidore: 1
Wicklow: Arklow Rural: 1
Wicklow: Arklow Urban No. 1: 15
Wicklow: Aughrim: 3
Wicklow: Avoca: 1
Wicklow: Ballinaclash: 3
Wicklow: Ballincor: 2
Wicklow: Ballingate: 1
Wicklow: Ballinglen: 1
Wicklow: Ballyarthur: 1
Wicklow: Baltinglass: 7
Wicklow: Bray No. 2: 3
Wicklow: Bray No. 3: 6
Wicklow: Bray No.1: 10
Wicklow: Burgage: 1
Wicklow: Coolattin: 1
Wicklow: Cronebane: 4
Wicklow: Cronelea: 1
Wicklow: Dunganstown: 4
Wicklow: Dunganstown East: 2
Wicklow: Dunganstown South: 3
Wicklow: Ennereilly: 1
Wicklow: Greystones: 1
Wicklow: Hartstown: 1
Wicklow: Hollywood: 2
Wicklow: Humewood: 3
Wicklow: Imael North: 1
Wicklow: Kilbride : 1
Wicklow: Kilcoole: 1
Wicklow: Kilmacanoge: 2
Wicklow: Kilpipe: 1
Wicklow: Knockrath: 1
Wicklow: Newcastle Lower: 2
Wicklow: Powerscourt: 3
Wicklow: Rathdangan: 7
Wicklow: Rathdrum: 7
Wicklow: Shillelagh: 2
Wicklow: Stratford: 1
Wicklow: Togher: 1
Wicklow: Trooperstown: 1
Wicklow: Wicklow Urban: 8

Click on the red marker on the map below for a link to the full 1911 census entry.

For background on how the map was made (and its flaws), see the relevant blog entry.

Surname Dictionary

Breen Very numerous: Fermanagh & Ulster generally, Dublin, South East, Mid-West. Ir. Mac Braoin, a sept of Kilkenny and Ó Braoin, septs of the Midlands & Roscommon.This name occurs as O'Brien and Bruen in some areas. Braon, an early personal name. IF.
Brian rare: Down etc. Ir. Ó Briain, but in this case, Scottish. The personal name Brian was popular amongst the Normans who got it from their Breton allies and so it found its way to Scotland independently of its Irish currency. SS & GPN.
Brien fairly numerous: Dublin etc. See Bryan and O'Brien.
Bryan numerous: Ulster, Dublin, Cork, South East. Anglo-Norman associated with Kilkenny. The prevalence in Fermanagh suggests Mac Braoin, a branch of Mac Manus, but the large numbers in the Belfast area are likely to be of Scottish origin.
Mac Braoin Breen, Mac Brien: Is deacair idirdealú le Ó Braoin ach bhí clann Mac Braoin in Osraí agus is cosúil gur leo-san a bhaineann na Braonaigh san Oir-Deisceart. Bhí dream eile i bhFear Manach. Bhí clann bheag in oirthear Luimnigh sa 16 céad. IF.
Ó Braoin Very rare: Ir.Lang. See Breen.
Ó Braoin Breen, Bruen: an-líonmhar ar fud na tíre: Fear Manach, Oir-Deisceart & Meán-Iarthair ach go h-áirithe; Bruen i gConnachta. Luann de Bhulbh ceithre chlann in áiteanna éagsúla - an dream ba mhó suite gar d' Áth Luain. Bhí clann eile bunaithe i Ráth Bhoth, Tír Chonaill. An bhrí atá aige ar an ainm Braon ná "brón".
Ó Briain Quite numerous: Dublin etc. Ir.Lang. See O'Brien.
Ó Briain O'Brien: an-líonmhar ar fad, go h-áirithe sa Chlár agus Luimneach. Shíolraigh an Brianaigh ó Bhrian Bóirmhe, "Imperator Scotorum". Ceann de chlanna móra na h-Éireann a bhí pháirteach i stair na tíre (ní i gcónaí ar an dtaobh cheart) ó Chath Chluain Tarbh go dtí an lá inniu. Ceiltis, Brigonos, uasal. GPN, SGG, IF &MIF.
O'Brien Very numerous: all areas, most in Munster and Leinster. Ir. Ó Briain. Leading sept of Thomond (Clare-Limerick), owing prominence to Brian Boru, High-King 1002-1014 A.D. The first name Brian is an old Celtic one, meaning perhaps "noble". GPN.
O'Bryan rare: Ulster. Variant of O'Brien, q.v.
 

Variants in 1911, with total occurences

Breen: 441
Brian: 13
Brians: 3
Brien: 658
Brine: 15
Bryan: 160
Bryans: 51
Bryne: 20
Brynes: 2
O brein: 10
O Brian: 4
O brien: 486
O bryan: 3
O' brien: 139
O'Breen: 1
O'Brein: 7
O'Brian: 6
O'Brien: 1199
O'Briene: 2
O'Briens: 1
O'Brin: 3
O'Brine: 22
O'Brion: 2
O'Bryan: 2
O'Bryen: 4

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