Frank Hunter is the maternal grandfather of the Thornberrys and Marianne’s dad.
Frank is Sophie’s husband they first appeared in the anniversary. Where they come to selabrate their wedding anaversery. While the Thornberrys film animals.
He and Sophie have been married a few months before Marianne and her sister were born.
His Grandson Tyler Tucker traveled with the Thornberrys for a while. Until birthday quake where his parents come for his birthday.
He did not apear in family tradition for an unknown reason. Even though he is married to Sophie. It could be that he was away for a weekend someplace elsewhere and can't be with his wife.
He is not seen in the origin of Donnie because it was mentioned that he was asleep where he lives. But his wife Came to celebrate Donnie’s birthday. In Borneo as she talks to him on her phone.
He likes to visit the family once in a while and also is fond of his grandkids. and he and his wife send over cheese munchies all of the time for their granddaughters and grandson.
Trivia
his name is very similar to Frank Walker.