Abraham is Mona's grandfather/husband
husband
Ling is Maggie's cousin/sister
cousin
Patty is Bart's aunt/mother
aunt
Clancy is Lisa's granfather/uncle
grandfather
Homer and Marge are Maggie's parents/grandparents
parents
Marge is Homer's wife/husband
wife
Lisa is Homer and Marge's daughter/grandmother
daughter
Herb is Bart's brother/uncle
uncle
Bart is Herb's son/nephew
nephew
Bart is Homer's father/son
son
Ling is Marge's daughter/niece
niece