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The O'Neil family is an important part of Teenage Mutant Ninja Turtles lore, with most incarnations hosting one or more characters with that surname.
You may be looking for:
- April O'Neil, the Ninja Turtles' best human friend and sister/mother figure in many incarnations.
- Robyn O'Neil, April's sister
- Mrs. O'Neil, April's mother
- Mr. O'Neil or Dr. O'Neil, April's father
- Augustus O'Neil, April's uncle
- Cody Jones, Casey Jones and April's great-grandson, who was also known as Cody O'Neil and ran O'Neil Tech.