Jacopo Peterman

The television show Seinfeld featured many minor characters.

His first name appears to be unknown by any of the characters, even his employer—in The Package his business card gave his name merely as "NEWMAN". A minor character calls him "Norman" in "The Bottle Deposit", but this is usually assumed to be a mistake on the part of the actress/character, rather than any revelation of Newman's first name. Newman himself is petty and vindictive (and prone to hysteria), and often depicted as a stereotypical "evil genius", which is usually undermined in some way. Though he greatly resents Jerry, he is shown to be willing to work with him at times, but will return later to wreak havoc on his social life, though Jerry often gets the last word. Jerry's exasperation, or epiphany involving Newman will cause him to clench his fist and mutter "Newman!" under his breath.

Newman has been shown to harbor unrequited romantic feelings for Elaine.

Seinfeld at the Internet Movie Database

...
Wikipedia