In high school I knew a Jim Garner.
My cousin is Jeff Hostetler.
In my previous job, I worked with a research scientist named Steve Miller. Lots of jokes about his prodigious work in control systems since leaving the band…
Oh, and in a previous job several years ago, I knew a guy named Mike Hanks who had a little boy named Tom. Mike’s BiL is a radio personality in Indianapolis, and one day interviewed (3 y. o.) Tom Hanks on the air…
Went to high school with John Lennon.
I went to college with Richie Cunningham. Yes, he insisted on going by “Richie,” but got really mad when anybody said, “Where’s Potsie?” Dude, you’re kind of asking for it . . .
My wife went to high school with a Michael Jackson (one of many, judging by this thread).
Have a student here called Samuel Johnson, studying English too. I expect he’ll get a first!
Also know of a solicitors nearby called William Hague Solicitors. Probably only makes sense to UK dopers, that one!
Mr. Stuff works with Jerry Springer. 
He’s actually older than the famous one, though, so it isn’t his parents’ fault.
He has heard so many jokes that he is completely immune to them, although he has a remarkable talent for turning them into free beer. He’s a hoot.
I once dated John Paul Jones.
I went to high school with a guy named Kenneth Lay. Much younger than the famous one and (last I heard) still alive.
My sister went to high school with George Harrison and Elizabeth Taylor; I went to camp with Drew Pearson; and there’s a TV reporter here in the NY area named Vivien Li, which I find hilarious. “And here’s Vivien Li with the traffic report!”
I’m an Eddie Murphy (as is Dad, and his father was one as well).
The best man at my wedding was Matthew LeBlanc.
I work with a Clarence Thomas.
My girlfriend married Bill Murray.
I knew a Michael Bolton and a Chris Robinson (from the Black Crowes).
In college, Scott Wolfe had a huge crush on me. It got kind of creepy when he kept sending me “secret admirer” gifts. I ended up breaking the poor guy’s heart.
I once worked with a Scottish guy called Ronald McDonald. I’m surprised that that the burger company didn’t sue him for using their trademark . He would be in his thirties now, so I don’t know if he was born and christened before the clown character was invented.
I used to know a guy named Andy Taylor. I have a co-worker named John Holmes.
I took a work seminar from a Chinese guy named Bruce Lee. He was really young too, so it had to have been homage or obliviousness.
Oh yeah, my brother has played music for something like 15 years with an upright bassist named Ron McDonald. He doesn’t like to go by Ronald, but I don’t think that stops anybody from making jokes. Maybe that explains his demeanor.
I think we all knew a Jim Davis in high school.
I also know a Grace Kelly. She had no idea who the other one was until the car accident. After a while, she took to introducing herself as “Grace Kelly, who is not dead.”
I went to college with a Sarah Connor. She freaked out when she saw Terminator. Gave her nightmares for months.
I also worked with a Michael Jackson (he preferred Mike). I have phone conversations regularly with Kenny Rogers (a sales rep for the company where I work). My brother-in-law’s brother is Matthew Brady, although the Civil War-era photographer spelled it with only one “T”.