My great grandfather was Patrick Mannix. He was born somewhere between 1837-1848. According to his death certificate he was born in County Cork. His parents were John and Margaret Mannix. He came to America about 1860. He settled in upstate New York. He was married to Julia Falvey. They had 14 children. Several died as children. Does any of this fit into your information? Thank you.
Cathe Mannix Casey