Dan Povenmire, the co-creator of the show.
No, Heinz Doofenshmirtz is a character on Phineas and Ferb. Maybe he will, if your talking about the person who plays the voice of him. But, I dont know who he is.
Vanessa Doofensmirtz
"Chez Platypus"
It's 'My name is Doof and you do what i say' and it's in Musical Cliptastic Countdown.
No. Dr. Heinz Doofenshmirtz is the main antagonist of Phineas and Ferb.
Vincent Martella plays Phineas and Thomas Sangster plays Ferb.
Maulik Pancholy plays Baljeet on Phineas and Ferb.
Mitchell Musso plays jeremy on Phineas and ferb!
Allyson Stoner voices Isabella on Phineas and Ferb.
Phineas is voiced by Vincent Martella.
The series never says, but there are many fan theories. Most of them think that Dr. Doofenshmirtz is their real father. Here are some theories related with with their real father: http://disappearedflynn.wordpress.com/ in one of Dr. Doofenshmirtz flash backs the one where the phineas and ferb reverse engineer Dr. Doofenshmirtz inventions he was dating Linda (Phineas's blood mom) so that might mean that he had Phineas with her.
Allison Stoner plays Isabella's voice in Phineas and Ferb.