Household numbers by county in Griffith's (1847-64), as on the map

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Surname Dictionary

Cassidy Very numerous: Ulster, N Leinster, Dublin etc. Ir. Ó Caiside. Physicians to the Maguires of Fermanagh, they were dispersed in the Plantation of Ulster. IF.
Ó Caiside Cassidy: an-líonmhar in Ultaibh, Laighin Thuaidh & rl. Ó thús, clann léannta a bhain le Mag Uidhir Fhear Manach.IF.
O Casaide rare: Dublin etc. Ir.Lang. See Cassidy.


  • Cassidi in 1659.
  • Cassidi births mapped 1864-1913
  • Cassidi 1911 census map
  • Cassidi Roman Catholic baptisms

Parishes where Cassidi and a second surname are found together


Variants in Griffith's
& total households

Click here to see all variants on a single map

Click on a name to see it on the map.

Non-Griffith's Variants

Click here for all variant sources.

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