Keeper of the Wicket
A white rabbit who guards the entrance to Bunnybury
First named in The Emerald City of Oz, ch. 19
answered the rabbit, "I'm merely the Keeper of the Wicket, and a person of little importance, although I try to do my duty.
As the books describe them
He was a good sized white rabbit with pink eyes, much like all other white rabbits. But the astonishing thing about him was the manner in which he was dressed. He wore a white satin jacket embroidered with gold, and having diamond buttons. The Emerald City of Oz, ch. 19