Hi, Olivia -
I don't know much about the exact origin of the Cassidys, other than that
James Cassidy and his wife Ellen Dourish emigrated from Enniskillan to
Fredericton, NB in 1847. One of their sons, John, married Anne Jane Gallagher, a
g-g-aunt. I have not been to Enniskillan, which I hope to do soon, since I have
members of another family branch, Gillogly, who emigrated from Ederny.
Sorry that I can't shed much light on the subject.