If your brother or sister have a son or a daughter they are your:
THE SIMPSONS FAMILY TREE
LET’S SEE THEIR RELATIONSHIP! *Homer is Lisa 's father AND Lisa is Homer 's daughter. * Marge is Bart 's mother AND Bart is Marge 's son. *Maggie is Bart 's sister AND Bart is Maggie 's brother. *Herb is Lisa 's uncle AND Lisa is Herb 's niece. *Selma is Bart 's aunt AND Bart is Selma 's nephew. *Abraham is Maggie 's grandfather AND Maggie is Abraham 's granddaughter. *Abraham and Mona are Bart 's grandparents AND Bart is Abraham and Mona 's grandson. .