I don't know if this will help, but I just recently discovered that my GGGrandmother was Rose Devlin.She was born about 1828 in Co Tyrone. She married a John Hunter, had a daughter Rebecca in 1851, then Hunter died. Rose and Rebecca came to NY in 1852 and Rose re-married to Michael Mohan. I have just gotten into contact with the Mohan's who seem to have some info in regards to the Devlin family. Rose & co. eventually moved to Chicago in 1860, but Rose did have some other family here. Maybe Felix was a brother? Do you think this is a connection?