Laverne Frensky (sister or sister-in-law)
Oliver Frensky (brother or brother-in-law)
Bubby (mother or mother-in-law)
Bubby's husband (father or father-in-law; deceased)
Grandpa Frensky (father or father-in-law)
Francine's cousin (possibly niece)
|Cartoon debut||Arthur's Perfect Christmas|
Seth's father is the unnamed father of Francine's cousin Seth. He first appears as an unnamed relative in Arthur's Perfect Christmas. In the TV series, he appeared in "Francine's Split Decision" at Seth's bar mitzvah, and again in "Francine's Pilfered Paper."