Quote from Chandler in The One with Rachel's Date
Chandler: Hey, Bob. Bob: Hey, Toby. Have a good night. Ross: Did that guy just call you Toby? Chandler: Yeah, he thinks that's my name. Ross: Well, why don't you correct him? Chandler: Oh, it's been going on way too long now. I mean, the first time he said it, were just passing in the hallway so I didn't say anything. Then the next time he said, "Hey, Toby, you want a doughnut?" And I wanted the doughnut. And now it's five years later, the doughnut's gone and I'm still Toby.