My Honey Bee has been called many things: Bumble Bee, Humble Bee, Rumble Bee. By one person, it was called all three... every time she saw it.
It's called Dotty by one friend.
But, I call it Willard... Someone said the car looked like a mallard, so my brain went to one of my MMO character's named Willard. So it stuck.
Rumble Bee sounds good too!