John Mery
don't think that the case was of John Mery being Stefon Hajdu's (my grandfather) biological father is really in question, because on his Last Will and Testament he listed (K)Clara Hajdu as his loyal friend and faithful housekeeper. I think it is probably more likely that he MIGHT have been Hungarian though and changed his name. My grandmother told me that he before he came to America he was invovled in a duel and killed someone, but I don't know if there is any truth to that, or if it would have been any reason for him to change his name. She told me that he spoke and wrote fluently in eleven different languages, so he probably spoke Hungarian even if Clara didn't speak whatever his native language was. My grandmother also told me that John Mery lived in France, but none of US census records I found ever mention France. There is one census record that says that he filed a Declaration if Intent, but I'm not sure how to request a copy of something like that since I have no idea what year he would have filed it.
I do know that he was married to a lady named Blach(e) Seurat (Seraut), not sure of the spelling, but she is listed as my grandfather's brother's mother on his application for a Social Security number.
Sincerely, John Fisher