Seth McFarlane IS the main writter.
Larry King Live - 1985 Seth McFarlane was released on: USA: 4 August 2010
i have always wondered if they are the same person. good question! i think they are probably not.
Iconoclasts - 2005 Seth McFarlane and Norah Jones 6-3 was released on: USA: 23 October 2012
Seth McFarlane. He also does most of the voices in the show.
Seth McFarlane and the people who made Family Guy
Yes !! Guess where !! Hint: Pond.
Kevin Pollak's Chat Show - 2009 Seth McFarlane 1-21 was released on: USA: 30 August 2009
No
Yes, and they are going at like wild bunnies.
Considering Todd's last name is McFarlane & Seth's is MacFarlane, and Todd is not married to Seth's sister & Seth is not married to Todd's sister (if he has one), it would be rather hard for two people with different last names to be related.
Seth McFarlane does the voice for Brian on the cartoon Family Guy. McFarlane also does the voices for Peter Griffin, Stewie Griffin, and Glenn Quagmire.