Tommy is the youngest son of D.J. Tanner Fuller and the late Tommy Fuller, Sr.
Tommy is a baby, with blonde hair like his mother and brown eyes like his father.
- D.J. Tanner-Fuller: mother
- Tommy Fuller, Sr.: father (deceased)
- Jackson Fuller: brother
- Max Fuller: brother
- Danny Tanner: grandfather
- Pamela Tanner: grandmother (deceased)
- Teri Tanner: step grandmother
- Stephanie Tanner: aunt
- Michelle Tanner: aunt
- Claire Tanner: great-grandmother
- Wendy Tanner: great-aunt
- Jesse Katsopolis: great-uncle
- Rebecca Katsopolis: great-aunt
- Nicky Katsopolis: first cousin, once removed
- Alex Katsopolis: first cousin, once removed
- Nick Katsopolis: great-grandfather
- Irene Katsopolis: great-grandmother
His first word was "Steph".