Jeff 'Swampy' Marsh
- Anniversaire:
- 12/09/1960
- Lieu de naissance:
- Santa Monica, California, USA:
 | Phineas and Ferb the Movie: Candace Against the Universe (2020) Major Monogram (voice) |
 | TV's Funniest Animated Stars: A Paley Center for Media Special (2015) Self |
 | Phineas and Ferb: The O.W.C.A. Files (2015) Major Monogram / Additional Voices (voice) |
 | Phineas and Ferb: Last Day of Summer (2015) Major Monogram (voice) |
 | Phineas and Ferb: Night of the Living Pharmacists (2014) Major Francis Monogram (voice) |
 | Phineas and Ferb: Star Wars (2014) Major Hologram / Imperial Officer Jeff / Additional Voices |
 | Phineas and Ferb Save Summer (2014) Major Francis Monogram / Additional Voices (voice) |
 | I Know That Voice (2014) Self |
 | Phineas and Ferb: Mission Marvel (2013) Francis Major Monogram / Gordon Gutsofanemu / Additional Voices |
 | Phineas and Ferb: The Perry Files - Animal Agents (2013) Major Monogram (voice) |
 | Phineas and Ferb: The Daze of Summer (2012) |
 | Phineas and Ferb The Movie: Across the 2nd Dimension (2011) Major Francis Monogram / Monogram-2 (voice) |
 | Phineas and Ferb: Summer Belongs to You! (2010) Major Francis Monogram (voice) / Additional Voices |
 | Phineas and Ferb Christmas Vacation! (2009) Major Monogram (voice) |
