Phineas and Ferb Theories Wiki
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This is the list of possible familial relationships which appear in Phineas and Ferb.

Parent-child[]

The Missing Parents of the Flynn-Fletcher Family[]

Main article: Phineas and Candace's biological father
Main article: Ferb's biological mother

Major Monogram[]

Isabella Garcia-Shapiro[]

Major Monogram might be Isabella's father or stepfather, in actual Danville universe. Monogram's wife is all about Mexico and stuff. In "Doof Dynasty", Major Monogram is also depicted as Isabella's father. However, Isabella met Major Monogram many times without mentioning that he's her father.

Siblings[]

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