|Name||Martha and Beatrice|
Great Aunt Martha and Great Aunt Beatrice are Gramma's sisters and Greg's great-aunts and Susan's aunts. They always arrive at family get-togethers to see who can bring the most insulting gift for each other, such as ketchup packets or even a used bar of deodorant. They are only mentioned in Hard Luck.
- Diary of a Wimpy Kid: Hard Luck (First and only appearance, mentioned)