The adult version of Bart is an adult doppelganger of Bart Simpson.
Jenda (formerly Jenda Simpson) is Bart's future girlfriend and eventual ex-wife. Eight years into the future Jenda is dating Bart Simpson. They attend prom.
Bartholomew JoJo "Bart" Simpson (born April 1, 1980) is one of the main this was because other adults would refer to him as this), while Homer in turn often.