Clovis Quimby

Clovis Quimby is Joe Quimby's brother who is an alcoholic. Although he has never been seen, Lisa claimed that he was the one who ran over Snowball I.

The Simpsons: Tapped Out
Clovis is said to be Freddy Quimby's father; during a conversation with his uncle Joe Quimby, Freddy says: "Don't worry, Uncle. I've learned the Quimby code of discretion from my father, Clovis. He's the master! So discrete we haven't even seen him since he boarded that small plane years ago."