Bezos was 30.
38
Bezos was born in 64, he's a year older than I am and Amazon was started in 1993.
You can do the math for yourself.
Bezos once said in an interview that he was 38 when he started Amazon, after leaving DEShaw as a manager.
Jeff Bezos?
This is a myth. It is purported because most of the 30+ entrepreneurs are not vocal about their successes.