Grandparent: CONFIRMED!! (Father of Santa, Agatha and Lex): Mephisto
Location of Home: North Pole
Father: Santa Claus
Mother: Evelyn Quan Wang (Everything Everywhere All at Once)
Son: Pinocchio
Daughter: Eleven (Stranger Things)
Family Pet: Harry (Harry and the Hendersons)
Grandparent: Mephisto
Three unsorted kin (cousins, in-laws, other grandparents. etc):
1. Agatha Trunchbull (Sister of Santa Claus/Aunt)
2. Lex Luthor (brother of Santa Claus/Uncle)
3.
Option #1: Buffy the Vampire Slayer
Option #2: