Hiya Cynda,
I looked in Griffith's Valuation of Ireland. The Sneyds in Dublin were there between 1848-51 when
the Valuation was conducted in the city. I'm sorry I did not check for the exact dates of the other
four but they were in Ireland between 1848-61.
Margaret Sneyd, Blessington Street, St. Marys, Dublin
William Sneyd, Esq., Little Forrest, Swords, Dublin
Thomas Sneyd, Monkstown Road, Monkstown, Dublin
James Sneyd, Bellsgrove, Ballymachugh, Cavan
Charles Sneyd, Curran, Clonfeacle, Tyrone
Denis Sneyd, Bellsgrove, Ballymachugh, Cavan
Anne Sneyd, Bellsgrove, Ballymachugh, Cavan
I've not come across the surname Sneyd before so have no idea about the faith of this family.
Patrick McCardle might possibly be a member of the Catholic faith.
Two Sneyds appear in the 1850 Dublin Directory of 1850:
Henry W., 48-49 Sir John Rogerson's Quay (timber merchant)
Miss Margaret, 26 Blessington St (occup not listed)
Henry W puzzles me as he is not mentioned in the Valuation. I would thought his business qualified
as a property and would also have expected him to be a householder.
All the Best, Chris