Growing up on Smallville, I had always assumed Lex Luthor's father had a canon name of Lionel. Recently, Supergirl also featured a Lionel Luthor, which helped to further this belief. Then the linked question happened. Then I started looking at
With addition of a little more research bringing up older names for him, including Jules Thorul, or Alexander Luthor, I'm questioning if "Lionel" was his actual comic-canon name, or if it was just cemented due to Smallville and later adopted in comics.
Inspired by: What is the origin of the name Lexcorp?