“For one year, I was Keith Mitchell Coogan on my headshots. The next year, I was just Keith Coogan. And I have gone by that ever since, maybe 1984 or 1985. That is my mothers maiden name, and it was out of reverence for my grandfather.”
Source : "EXCLUSIVE: Keith Coogan Talks The Fox and the Hound 30th Anniversary Blu-ray". Interview with B.Alan Orange, movieweb.com. August 15, 2011.