On "Seinfeld", what is Uncle Leo's wife's name?

On "Seinfeld," Uncle Leo’s wife is named Stella. She appears in the third-season episode "The Pen," when Jerry visits his parents in Florida and meets Leo and Stella at the Pines of Mar Gables retirement community.

Stella is notable because Jerry introduces her as his aunt, even though the series otherwise focuses far more on Uncle Leo than on his marriage. The character is associated with the memorable name-shouting joke built around "Stella," a reference that also evokes the famous cry from Tennessee Williams’s play "A Streetcar Named Desire."

The show later creates some uncertainty about Stella’s fate. By the seventh season, Uncle Leo is living as though he is single, and the series does not clearly explain whether Stella died or the couple divorced. That continuity gap can make the answer feel less certain, but it does not change the fact that Stella is identified as Leo’s wife in "The Pen."