Much like Kramer, Newman is addressed by last name. His first name is never mentioned. In the episode "The Bottle Deposit, Part 2" a character (the farmer's daughter) shouts "Goodbye, Norman," but this was a mistake on the part of the actress (Karen Lynn Scott). It was left in because it was considered funny (and it could be taken as a joke about her having slept with him without even knowing his name).
Kramer's first name is Cosmo, making him Cosmo Kramer.
I believe Newman was his last name. He's usually (invariably?) called by that, much like Kramer (whose first name is actually Cosmo).
Wayne Knight
his first name is never actually said
Ralph
His last name was Kramer, which was usually the name they called him.
Everyone knows on the show his mothers name is Helen Seinfeld. In real life his mothers name is Betty Seinfeld.
Elaine's first and last name are Elaine Benes.Middle name is Marie
David Puddy's (From Seinfeld) real name is Patrick Warburton.
1998
His last name was Kramer, which was usually the name they called him.
Jerry Seinfeld
Abbado
Jerry Seinfeld's birth name is Jerome Allen Seinfeld.
His real name is Jerome Seinfeld.
Everyone knows on the show his mothers name is Helen Seinfeld. In real life his mothers name is Betty Seinfeld.
Elaine's first and last name are Elaine Benes.Middle name is Marie
True
Lyda D. Newman's father's name was George W. Brown.
On Seinfeld, the cleaning womans name was Evie
Jessica Seinfeld's birth name is Nina Danielle Sklar.
David Puddy's (From Seinfeld) real name is Patrick Warburton.