Jiff Simpson

Bart's Youngest Son is the child of Bart and Jenda.

History
He first arrives with his brother at The Lofts at Springfield Elementary as their mother forces them to associate more with Bart. Bart lies to them by assuring them it will be the best Christmas, but they can read minds and are aware of it. Later Bart becomes jealous after he is told Jenda has re-married. Also, Homer spent time with them, which again made Bart jealous.

Trivia

 * Neither of the children's' names are revealed.