Hendrick Frosbythe, also known as Uncle Hendrick, is the great-uncle of Kit Kittredge.
Hendrick is Margaret Kittredge's wealthy and very disapproving uncle; the family refers to him as Uncle Kendrick. Uncle Hendrick disapproves of the way the Kittredges handle money, being especially critical of Jack Kittredge. Margaret's mother (who is deceased) was his sister, though it is not specified if she was the older or younger sister. He often calls upon Kit's mother for "care". Uncle Hendrick is wealthy, hinting that Margaret likely grew up in a higher status than she currently occupies. He never misses a chance to be critical of Kit's parents.
Kit describes Uncle Hendrick as a "sourpuss", Kit and Ruthie claim him to be the ogre of Cincinnati. Uncle Hendrick always greets Kit with sharp brainteasers which leave her feeling flustered and fumbled. She always feels foolish around him. He is a stickler for time.
Uncle Hendrick is a miser and skinflint, who doesn't believe in giving money away or helping others who are struggling, instead thinking people must "earn money" even when it is clear there are few ways to do so. Uncle Hendrick isn't compassionate to those who have lost their jobs and homes, as he is against the Covington hospital being turned into a homeless shelter. Uncle Hendrick also is against FDR, who he calls "that man in the White House". He feels that FDR is milking taxpayers' money to fund his programs. He's exceptionally selfish; when the Kittridges end up behind on the mortgage, he refuses to help and tells Margaret that he won't give them any money, rather deciding that they can move in with him once they lose the house. He considers the family's investment in the car dealership and and their purchase of the house throwing away money and often says he won't "throw good money after bad." He does however, say he doesn't care who does a job as long as it's done to his satisfaction, allowing Kit ti make money by doing his errands.
Even though Kit finds Uncle Hendrick to be "crabby, cranky, and cantankerous", she admits that Uncle Hendrick taught her how to properly write to the newspaper through all of the letters he had Kit write when he was injured. Kit also admires the way Uncle Hendrick puts words together.
He has a black Scottish terrier named Inky who is just as cranky as him.
In the Books
Meet Kit: An American Girl
Kit's Surprise: A Christmas Story
Margaret goes to Hendrick to ask for help to catch up to the mortgage. He refuses, stating that he won't throw good money after bad. He says instead that when the family loses the house, they can instead move in with him.
Changes for Kit: A Winter Story
In The Film
He is played by Kenneth Walsh.