Conversation so far:
Who is Cosmo Kramer based on?
The character of Kramer was originally based on the real-life Kenny Kramer, a neighbor of co-creator Larry David from New York.
Why did co-creator Larry David use Kenny Kramer to base the character of Cosmo Kramer on?

Question: Was Kenny Kramer a friend of Larry David's?
Self-contained rewrite: Was Kenny Kramer a friend of co-creator Larry David's?