Cassin | fairly rare: Waterford-Kilkenny etc. Ir. Mac Caisín. But Woulfe mentions Ó Caisín as as a variant in Munster. A connection with Ó Casáin is possible. See Cashin. However the English name, also, is honoured in a great theatrical family of 20 cent. MIF. |
Casson | rare: Ballymena, Derry etc. English, "son of Cass"; possibly synonym of Cassin. |
Parishes where Cassan and a second surname are found together
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