I also am searching for my McCarthy relatives, Julie. I'm sorry to say, I know nothing about them other than my Great-Great Grandfather was Joseph McCarthy, born in Ireland in 1837, died 1906, Butte, Montana. He and his brother, Simon McCarthy, came to the U.S. around 1865.
He married Kate Shea in 1867, and they lived in Ironwood, Gogebic Co., Michigan. In 1900, they were living in Butte, Montana. My Great-Grandfather John McCarthy,a widower, was living with them in 1910.
Do you think they're the same McCarthys?
Loretta McDermott McGinn