Stanley Simpson is the second cousin of the Simpson children, who appears when Homer tries to show Lisa how successful the Simpsons are. He shoots birds at the airport. In the image to the right he wears a red jacket and stands just above Lisa's head. On the Simpsons cast poster his hair was mistakenly changed to black.
Given the fact that he is described as a second cousin of Lisa, it is obvious that he is the grandson ofoneofAbe'sbrothers.