Possible Clues:

• "Great Jewish Joke Book" writer
• Big name in Borscht Belt comedy
• Longtime comic with a "Great Jewish Joke Book"
• Longtime comic with a 'Great Jewish Joke Book'
• Comic who said 'If you want to read about love and marriage, you've got to buy two separate books'
• "Matzo Balls for Breakfast" author
• *Billy Crystal's 'Memories of Me' co-star
• Comic who said 'A short summary of every Jewish holiday: They tried to kill us. We won. Let's eat'
• He said 'Marriage is nature's way of keeping us from fighting with strangers'
• Comic born Irwin Kniberg