Kirwan

I am researching thomas Kirwan J.P 1772- 5th June 1852 a wealthy dublin Merchant, he was connected to the Cregg and castle hackett Kirwans. His family made a fortune in the west Indies, I am not sure which island but I know there were Kirwans on antigua and would be interested in any information you could give me
yours sincerely
Aoife FitzGerald

Sometime last year a family member did a family tree of gradnfather that included his parents. His mother name was Sarah Kirwan. She was born in Antigua in 1904 and died in Toronto, Canada in 1977, She was married to my great-grand father Raymond Lewis. I dont know if this helps you in any way.