On a somewhat related note, I actually ran into someone with the username 'The Great Papyrus' While playing prop hunt last night. He did a pretty good voice impression too (I assume anyways, I've never played Undertale and I'm pretty sure there's no voice acting, but he sounded like I would imagine the character should sound). I'm pretty sure there was a player named Sans as well.
Just kinda thought it was neat to meet someone who managed to grab the original character name first, and also played the part.