Flynn
Caroline Rhea is the actress that does the voice of Phineas and Ferb's Mother.
Perry the platypus
dave moon
No it is actually their inventions
Ferb is Phineas's stepbrother. Phineas's mom married Ferbs dad.
Phineas is voiced by Vincent Martella. Ferb is voiced by Thomas Sangster.
Because they are step-brothers they have different grandmothers. Phineas' is named Betty-Joe Flynn his grandpa is Clyde Flynn. Ferbs' is Winifred Flecter and his grandpa is Reginald Flecter.
Lawrence Fletcher is voiced by Richard O'Brien.
Grandpa Clyde Flynn and Grandma Betty Jo Flynn are Phineas and Ferb's grandparents.
Phineas is Phineas Flynn and Ferb is Ferb Fletcher.
Ferb is the stepbrother of candace.Phineas and candace are real siblings.