Helen Seinfeld, played by Liz Sheridan, is a fictional character on Seinfeld. She is Jerry Seinfeld's mother. Her husband—Jerry's father—is Morty Seinfeld. By the time the series opens, the two have retired and live in Florida.
She thinks Jerry is perfect. Helen's catchphrase in the series is her rhetorical question about Jerry, "How could anyone not like him?"
According to Jerry, Helen has never once set foot in a natural body of water.
Anytime Jerry's father is on the phone Helen is always talking with him on the same line.
A blog dedicated to the legality of the issues that arise in Seinfeld episodes, Seinfeld Law, has analyzed many of the classic Helen Seinfeld moments as they might have played out in a court of law.
The gallery page for Helen Seinfeld can be found here.