This name I am told came from a French name which was spelled Reuhl or something like that. They settled in Gaspe Quebec and later came to Washington, stopping for a time in South Dakota,where some still live. I do have just a bit of the family info, however my husband was adopted by them so I have not traced them very much.I would share what I do have if interested.
I think the name can have several nationality backgrounds. I live in Spokane Wa and the other Rail family here are Italian.