They're all the first names of guys in goofball knock-knock jokes
Example
Knock Knock. Who's there? Hiawatha. Hiawatha who? Hia-watha teenage werewolf
Also 'Arti-chokes when he eats too much,' 'Whine ott let me in and I'll tell you my real name,' etc.
Actually though, isn't 'Elevator' the name you get when Ella Fitzgerald marries Darth Vader? Hmm, I'll have to give this some more thought.
