This is what we found on Wikipedia regarding the Mark Nelson:

Mark Nelson or Marc Nelson may refer to:

• Mark Nelson (actor) (born 1955), American theater actor, director, and acting teacher
• Mark Nelson (cricketer) (born 1986), English cricketer
• Mark Nelson (police officer), superintendent of the North Dakota Highway Patrol
• Mark Nelson (artist), artist whose work has appeared in role-playing games and comic books
• Mark Nelson (Chicago artist) (born 1957), artist who has contributed public art to the Chicago area
• Mark Nelson (boxing referee), boxing referee from Maplewood, Minnesota
• Mark Nelson (musician), musician with the band Pan American
• Mark Nelson (Canadian football) (born 1956), defensive coordinator for the Edmonton Eskimos
• Mark Nelson (offensive lineman)
• Mark Nelson (footballer) (born 1969), Scottish former footballer
• Mark Nelson (video game designer), video game designer
• Mark Nelson (scientist), American ecologist
• Mark L. Nelson, American chemist
• Mark T. Nelson, American physiologist
• Mark W. Nelson, American academic, accountant, and dean of Cornell University's Samuel Curtis Johnson Graduate School of Management
• Marc Nelson (singer) (born 1971), American singer-songwriter and former member of R&B group Boyz II Men
• Marc Nelson (entertainer), Australian host in the Philippines