Below is a list of some of the minor characters in The 39 Clues. They are listed in alphabetical order by last name.
Mrs. Gomez is Nellie Gomez's mother. She is French, and taught French to her daughter.
Cousin Ingrid is a Cahill who was present at the reading of Grace's will in The Maze of Bones. When offered the choice between the first Clue, and $1,000,000, she chose the money. Ingrid was never mentioned again in the books until Rapid Fire Two where a Vesper inpersonated her before the will reading.