Tommy is a toddler with blonde hair like his mother and brown eyes like his father. He is always doing cute stuff with Cosmo.
- 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".
Tommy is behind in his language skills, as stated in "A Tommy Tale".