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Uncle Leo is a fictional character portrayed by Len Lesser in 15 episodes of the American sitcom...

Uncle Leo is a fictional character portrayed by Len Lesser in 15 episodes of the American sitcom Seinfeld. He is Jerry Seinfeld's uncle and Helen Seinfeld's brother. Uncle Leo is very eccentric. When coming across Jerry, he exclaims his catchphrase, "Jerry! Hello!" with his arms wide open (when Jerry has a Cape Fear-esque nightmare about him in "The Bookstore," Leo has the word "Jerry" tattooed on the fingers of his right hand and "Hello" on the fingers of his left one). He often brags about his son (Jerry's cousin Jeffrey, who never appears on the show) and his various accomplishments while working in the Parks Department. Leo is very sensitive about greetings—when Jerry once avoided saying "hello" to Leo on the street, he was offended and complained to Jerry's mother. Uncle Leo's last name is never revealed. In an episode where Leo signs for a package of Jerry's, he actually signs it "Uncle Leo". In "The Bookstore", Jerry mentions "Leo" to Kramer. Kramer is initially confused, but upon remembering he says, "Oh, yeah. Right. Uncle Leo. Forgot his first name." Uncle Leo is retired. His wife Stella is seen in "The Pen," but in "The Shower Head" he dates a woman named Lydia. He