My mother was a Gallogly.My grandfather was William Gallogly who was from Ballinamore, Co Leitrim Ireland.He was one of 19 children and one of his brother's was Felix.Felix came to the US arriving in Providence, RI but I'm not sure of the year.
Rev. Daniel Gallogly wrote a book about Ballinamore and the Gallogly's some years back and perhaps you could get some info about that.The Gallogly family was a large family in that area. Father Dan was a teacher at St. Patrick's (I think) in Cavan for many years.He passed away about 10 years ago.
I'm happy to share any information about them if I can and I do hope this helps!