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| Mac Suibhne | Mac Sweeney, Sweeney: an-líonmhar ar fud na tíre (Sweeney in Ultaibh). Ba Gallóglaigh ó Albain iad; d'éirigh trí chlann i dTír Chonaill: Mac S. Fánaid, Mac S. Boghaine & Mac S. na dTuath. Craobh den chéad dream, bhogadar ó dheas sa 16 céad agus shocraigh i Múscraí Uí Fhloinn i seirbhís Mhic Charthaigh. Orthu san, an Corcaíoch, Terence Mac Swiney (1879-1920), Ard-Mhéara Chorcaí, a fuair bás ar stailc ocrais i Londain Shasana. Brí: suibhne = soineanta, lách. Féach Mac Shuibhne, leis. IF. |
| MacSweeney | numerous: most parts, especially Cork and Munster generally. Ir. Mac Suibhne, from first name Suibhne "well-disposed". The name came from Donegal where they were Scottish galloglasses in 14 cent. Ironically, in Donegal, the name is now Sweeney. |
| MacSwiney | Quite numerous: Cork etc. Variant of Mac Sweeney, q.v. |
| Sweeney | Very numerous: all areas, especially Donegal-Derry. Ir. Mac Suibhne (pleasant). They were Scottish galloglasses who establishd three septs in Donegal and a branch in Cork. See also Mac Sweeney and Mac Swiney. IF. |
| Swiney | rare: Belfast, Donegal. See Sweeney. |
Parishes where Swinny and a second surname are both baptised.