Conversation so far:
What does the show Seinfield  tell us about Cosmo Kramer's family?
Cosmo Kramer does not have a well-developed network of family members shown in the sitcom. Kramer was estranged for a long period from his mom, Babs Kramer.

Question: Is his father shown or mentioned?
Self-contained rewrite: Is Cosmo Kramer's father shown or mentioned in the show Seinfield?