1. Newman doesn’t have a first name (surprise). A common speculation is that his first name is “Norman,” because in the episode “The Bottle Deposit, Part 2,” (season 7, ep. 2) the farmer’s daughter shouts, “Goodbye, Norman!” This was actually the actress’s mistake — she mistook “Newman” for “Norman” in the script. Seinfeld‘s producers found the mistake funny, so they kept the error. Newman is elsewhere ‘officially’ considered only “Newman” when he goes to court and the judge refers to him as Mr. Newman. In the episode “The Package,” (season 8, ep. 5) his business card is shown — it reads, simply, “NEWMAN.”
2. Technically, Newman made his debut appearance in the seventh episode of the second season, but the role was voice only, and was portrayed by series co-creator Larry David. Newman first appeared in physical form in the episode “The Suicide,” which aired as the fifteenth episode of the third season.
3. Festivus was actually not created by George’s father, Frank Costanza. The fake holiday was created well before the series was even conceived, in 1966, by an editor of Reader’s Digest named Dan O’Keefe, who created it to celebrate the anniversary of his first date with his wife. Festivus came to the script of Seinfeld by way of O’Keefe’s son, who was working as a writer of the show. The aluminum pole was the writer’s own artistic spin on Festivus.