Bart Cumberdale

Bart Cumberdale is a boy who appears in "Bart of Darkness".

History
When the Simpsons bought a pool, Bart Simpson invited hundreds of children over to swim. Among them was Bart Cumberdale, whom some of the other guests apparently thought was the host, as they addressed him as "Bart" and one greeted Marge with "Hello, Mrs. Cumberdale".