For background on how the map was made (and its flaws), see the relevant blog entry.
|Cashin||Quite numerous: Laois, Tipperary, Kilkenny etc. Ir. Mac Caisín. Originally a family of hereditary physicians in Laois, the anglicised versions vary and there seems to be confusion with Ó Caisín which relates to Munster. See also Cassin. MIF.|
|Mac Caisín||Cashin: cuíosach líonmhar: Laois, Tiobraid Árann, Cill Chainnigh. Clann leighis in Osraí ab'ea iad. Brí: díspeagadh ar an ainm Cas a chiallaíonn catach nóaoibhinn. Deineadh Ó Caisín díobh uaireannta sa Mhumhain.MIF.|
|MacCashin||fairly rare: Down, Dublin etc. Ir. Mac Caisín, from first name Cas, curly. This name was associated with a medical family of Ossory but was also in Antrim.|
|Ó Caisín||Cashin, Cassin, Cassion. Féach Mac Caisín.|