Like you mean DC characters? They’re not real people dude. Just so you know. Technically though there are 6 “people” to have actively played a role as Robin, only 5 in canon though. Dick Grayson was the first and the original, still operates now as Nightwing, shortly as Batman himself. Then there was Jason Todd who was killed by the Joker, but brought back as The Red Hood. Then there was Tim Drake, who is now Red Robin. Then there was Stephanie Brown, who was formerly The Spoiler and later became Batgirl, but she served mostly as a pain in Batman’s ass. Finally is Damian Wayne, Batman’s bastard son with Talia al’ Guhl and the current Robin. The sixth is non-canonical and is Carrie Kelly and only appeared in Frank Miller’s The Dark Knight Returns. I’d really recommend you use this new thing called “Google” though in the future as you’ll find many comic book sites that are willing to give you these characters’ full histories.
how many people had the name robin