Ah, that's different: Fermat's Last Theorem was called a theorem because Fermat claimed to have proved it. Taking him at his word, it's been a theorem since 1637.
Probably not. In mathematics you can't call things after the people who have invented it, or solved it. (At least that's what my professors said when they had to explain why stuff has strange names. Often the guy who popularizes something gets the name, but fights it.)