Mikey Larkin is the youngest brother of Maryellen Larkin.
- Name: Mikey Larkin
- First Appearance: The One and Only
- Stan Larkin: Father
- Kay Larkin: Mother
- Joan Larkin: Oldest sister
- Carolyn Larkin: Older sister
- Maryellen Larkin: Older sister
- Beverly Larkin: Older sister
- Tom Larkin: Older brother.
- Grandpop: Maternal grandfather
- Grandmom: Maternal grandmother
- Jerry Ross: Brother-in-law