Okay, so I know this has been discussed a thousand times before. But I'm not posting this just to say "It's Roderick." Here are some clues as to what the name might be.
Idea #1: The name must be embarrassing enough that he would rather go by "Dipper".
- "Mabel" is a pretty old-fashioned name. Maybe Dipper's name is equally old fashioned, but much weirder ("Algernon")
- Or maybe their parents wanted to rhyme their names or make them similar, giving Dipper an awkward name. ("Glabel")
- 2: One of Dipper's friends, or someone he knows has the same name as him, so he changed it so they wouldn't get confused.
Any ideas?