What names of people have become nouns, verbs, or other forms of speech?

Orwellian.

Nixonian was a popular American adjective some years back.*
Sandwich and Boycott have been discussed here before.

*For that matter, we also have the “Americas” themselves.

Booze

Crapper

Benjamin

Freudian slip

Kubrickesque

Burtonesque
Benedict Arnold

Are we talking just famous people here or just names in general? Cause if its the latter I can think of a huge list of names.

I believe there’s a whole book devoted to eponyms out there somewhere by one of those people who earn a livelihood by writing about language for a popular audience. Here’s a starter list. Follow the links for more.

Jack, Peg, Pierce, Grace, Sue, Hope, Dawn, Will, Josh, Mark, Candy, Dot, Chuck, Pat, Ralph, Carol, Peter, May, Drew, Bob, Jimmy, Rose, Grant, Bill, Rob, Wade, Dick, Luke,Drew, May, Chase, Lance,Roger, Stu, Ray, Tom, Rush, Jimmy, Max

@uberbatman : I guess I’m thinking of famous people whose names have made their way into common usage.

MacGyver

“From this day forth, all the toilets in the kingdom shall be known as… Johns!”

He pulled a Clavin.

Boycott.

Cheating a little, but here are some examples used in cockney rhyming slang…..
Mae West – Best
Mariah Carey – Scary
Marilyn Manson – Handsome
Meryl Streep – Cheap
Michael Caine – Pain
Mork & Mindy – Windy

Hasslehoff

Arnold Palmer