Welcome to my site which started out as research into my own Cass ancestors who were originally from Thurles, Co Tipperary.  However, over time, I became interested in the history of the surname and where the surname was most prominent in Ireland.

My research does not only include Ireland. My study also developed into a search for those individuals with the Cass surname who migrated or emigrated to UK or Canada and USA and I hope to create  family trees from some of these emigrants.