Hi there,
Guess what, I have a great grandfahter Thomas Finnigan also, and he was born in 1884. I wonder if it could be the same one, and if we could be related. His son is Albert Finnigan, and his wife is florrie. They had my father Peter Finnigan, and uncle Andrew Finnigan. But I also understand that not only one person has that name. I have the family name history on how the Finnigan name got started from scratch. If you'd like me to send that to you, just let me know.
Shawn