- Mark Carson -- Mark Castrillon
- Mark Caudery -- Mark Chang
- Mark Chapman -- Mark Christopher
- Mark Christopher Rohrman -- Mark Clarin
- Mark Clark -- Mark Cloutier
- Mark Cocker -- Mark Colby
- Mark Coldberg -- Mark Condon
- Mark Conklin -- Mark Cool
- Mark Coram -- Mark Crawford Williams
- Mark Croft -- Mark Curran
- Mark Currey -- Mark D
- Mark D. -- Mark Dagley
- Mark Dailey -- Mark Dale