Theo Inigratte (born April 6, 2007) is one of the adoptive sons of Orla and John Inigratte and the quindecaplet brother of Blaine, Austin, Lindsay, Tara, Avril, Charlene, Lisa, Elena, Tyler, Kalan, Craig, Andy, Kim and Greg. He and the rest of his quindecaplet siblings were born in Vancouver, Canada.
- Father: John Inigratte
- Mother: Orla Inigratte
- Brothers: Tyler Inigratte, Kalan Inigratte, Craig Inigratte, Andy Inigratte, Greg Inigratte, Blaine Inigratte, Austin Inigratte
- Sisters: Elena Inigratte, Kim Inigratte, Lindsay Inigratte, Tara Inigratte, Avril Inigratte, Charlene Inigratte, Lisa Inigratte
- His full name is Theo Preston Inigratte
- His favorite color is white
- His favorite movie is Dude Where's My Car?
- His favorite food is avocado Reuben
- His favorite TV program is Futurama