"M" Bobs
- Robert Macfarlane - Author
- Bobby Mack - Blues Guitar
- Bob Mackie - Fashion Designer
- Robert MacNeil - Journalist
- Robert MacPherson - Photographer
- Roberto Magris - Jazz Piano
- Robert Maguire - Artist
- Robert Malley - Lawyer
- Robert Malthus - Author
- Robert Mandan - Actor
- Robert Mandel - Film Producer
- Bob Mankoff - Cartoonist
- Bob Manley - Business
- Robert Manning - Ohio House of Representatives
- Robert D. Manning - Economist
- Robert Manning - Engineer
- Robert Manning - Journalist
- Bob Manning - Pop Singer
- Bob Manning - Soul Singer
- Robert Mannyng - Author
- Robert Marble - Artist
- Robert Marchand - Bicycle Racer
- Bob Margolin - Blues Guitar
- Bob Marley - Reggae
- Robert Marshall - Author
- Rob Marshall - Film Director
- Robert Marshall - Playwright
- Robert Marshall - Wilderness Activist
- Bob Marshall - Kansas State Senate
- Bob Marshall - San Bruno, CA Mayor
- Robert Marshall - Canadian Politician
- Robert Marshall - Icelandic Politician
- Robert Marshall - Judge
- Bob Marshall Wilderness - Things
- Bob Marshall - Australian Rules Football
- Robert Marshall - Cricket
- Robert Marshall - Lawn Bowler
- Robert Marshall - Snooker
- Robert C. Marshall - Canadian Politician
- Robert C. Marshall - Football
- Robert G. Marshall - Virginia House of Delegates
- Robert G. Marshall - Soccer
- Robert I. Marshall - Delaware Senate
- Robert J. Marshall - Clergyman
- Robert J. Marshall - Billiards
- Robert L. Marshall - Educator
- Robert N. Marshall - Actor
- Robert O. Marshall - Business
- Robert S. Marshall - Soccer
- Robert W. Marshall - Football
- Robert W. Marshall - Soccer
- Bob Marshall-Andrews - British Politician
- Bob Martin - Actor
- Bob Martin - Singer
- Bob Martin - Singer / Songwriter
- Bobby Martin - Jazz Trumpet
- Bobby Martin - Songwriter
- Robert Martin - Singer / Songwriter
- Robert Martin - Audio Engineer
- Robert Martin - Cinematographer
- Robert Martin - Magazine Editor
- Robert Martin - Tuskegee Airman
- Bob Martin - Australian Politician
- Robert Martin - Oklahoma Governor
- Bob Martin - Basketball
- Robert Martin - Basketball
- Bob Martin - Football
- Bobby Martin - Football
- Bob Martin - Golf
- Bob Martin - Boxer
- Bob Martin - Rower
- Robert Anthony Martin - Political Activist
- Robert Bernard Martin - Author
- Robert C. Martin - Author
- Robert fitz Martin - Knight
- Robert J. Martin - New Jersey Senate
- Robert Montgomery Martin - Author
- Robert N. Martin - US House
- Robert S. Martin - Librarian
- Bob Martinez - Florida Governor
- Roberto Martinez - Soccer
- Roberto Martinez - Soccer
- Roberto Martinez - Soccer
- Roberto Martinez - Soccer
- Roberto Martinez - Soccer
- Roberto Martinez - Soccer
- Roberto Burle Marx - Architect
- Bobbie Ann Mason - Author
- Bob Massey - Tsunami Band
- Robert Massey - Football
- Bob Massie - Cricket
- Bobby Massie - Football
- Robert G. Massie - Australian Politician
- Robert K. Massie - Author
- Robert K. Massie - Activist
- Bob Mathias - Track & Field
- Robert Mathis - Football
- Robert Martinez - Artist
- Roberto Matta - Artist
- Bobby Matthews - Baseball
- Bob McAdoo - Basketball
- Robert T. McCall - Artist
- Robert McCall - Figure Skater
- Robert A. McCall - Lawyer
- Robert R. McCammon - Author
- Robert McCann - Business
- Bob McCann - Basketball
- Robert P. McChesney - Artist
- Robert W. McChesney - Author
- Bob McChesney - Jazz Trombone
- Robert D. McChesney - Scholar
- Bob McChesney - Football
- Bob McChesney - Football
- Bobby McClure - Soul Singer
- Robert R. McCormick - Newspaper Publisher
- Robert McCraken - Boxer
- Robert McCraken - Soccer
- Robert M. McCraken - US House
- Bobby McDermott - Basketball
- Bob McDonald - US Secretary of Veterans Affairs
- Bob McDonnell - Virginia Governor
- Robert M. McDowall - Ichthyologist
- Robert M. McDowall - Cricket
- Robert B. McDowell - Historian
- Robert M. McDowell - Federal Communications Commission Chairman
- Bob McEwen - US House
- Bob McFadden - Singer
- Bobby McFerrin - Vocals
- Robert McGinnis - Artist
- Bob McGrath - Actor
- Robert McGrath - Professor
- Robbie McGrath - Rugby
- Bob McKillop - Basketball
- Robert McKinley - Tennis
- Bobb McKittrick - Football
- Bob McLeod - Cricket
- Bob McNair - Business
- Robert McNamara - US Secretary of Defense
- Bobby McNeal - Soccer
- Robert H. McNeal - Author
- Bob McNeil - Soccer
- Robert Duncan McNeill - Actor
- Bob McNeill - Basketball
- Robert McNeill - Soccer
- Robert Medley - Artist
- Bob Melvin - Baseball
- Bob Menendez - US Senate
- Robert Menzies - Australian Prime Minister
- Robert Mercer - Business
- Bob Merrick - Sailor
- Rob Merrifield - Canadian Politician
- Robert B. Merrifield - Nobel Laureate in Chemistry
- Robert Merry - Author
- Robert Merry - Journalist
- Robert C. Merton - Nobel Laureate in Economics
- Robert K. Merton - Sociologist
- Robert Messenger - Journalist
- Robert Messenger - Australian Politician
- Robert Metcalfe - Inventor
- Robert Michael - Australian Rules Football
- Robert Michaels - Guitar
- Bob Michel - US House
- Robert Michels - Physician
- Robert Michels - Sociologist
- Robert Mickens - Journalist
- Microsoft Bob - Things
- Robert Warren Miller - Business
- Bob Miller - Nevada Governor
- Bob Miller - Baseball
- Bob Miller - Sportscaster
- Robert A. Millikan - Nobel Laureate in Physics
- Bob Milloy - Football
- Robert Mills - Architect
- Robert Mills - Physicist
- Bob Miner - Business
- Bobby Mitchell - Football
- Bobby Mitchell - Golf
- Robert Mitchum - Actor
- Robert Mnuchin - Art Dealer
- Robert Moline - Anglican Bishop
- Robert Mondavi - Winemaker
- Bob Monkhouse - Actor
- Bob Montana - Comics
- Robert Montgomery - Author
- Robert Moog - Creator Moog Synthesizer
- Bobby Moore - Soccer
- Robert Moran - Composer
- Robert Moran - Seattle, WA Mayor
- Robert L. Moran - Bronx, NY Alderman
- Robert Moray - Scottish Politician
- Bobby Moreno - Actor
- Bobby Moresco - Author
- Robert Hilton Morey - Baseball
- Robert Morey - Rower
- Robert Morgan - Author
- Robert Morgenthau - Lawyer
- Robert Morin - Director
- Robert Morin - Librarian
- Robert Morin - Physician
- Robert Morris - Artist
- Robert Morris - Author
- Robert Morris - Author
- Robert Morris - Actor
- Bob Morris - Singer / Songwriter
- Robert Morris - Composer
- Robert Morris - Lawyer
- Robert Morris - Founding Father of United States
- Robert Morris - Mayor of Denver
- Robert Morris - Basketball
- Robert Morris - Cricket
- Rob Morris - Football
- Bob Morris - Motor Sports
- Robert Morris - Soccer
- Colonel Robert Morris - Drummer
- Robert H. Morris - Cryptographer
- Robert Hunter Morris - Governor of Pennsylvania
- Robert Hunter Morris - Mayor of New York City
- Robert J. Morris - Activist
- Robert Lee Morris - Jewelry Designer
- Robert Michael Morris - Actor
- Robert Schofield Morris - Architect
- Robert Tappan Morris - Computer Scientist
- Robert Tuttle Morris - Surgeon
- Rob Morrow - Actor
- Robert Morrow - Irish Military
- Robert Morrow - Texas Politician
- Bobby Joe Morrow - Track & Field
- Robert Morse - Actor
- Bob Mortimer - Comedian
- Bob Moses - Drummer
- Bob Moses - Civil Rights Activist
- Robert Moses - Urban Planner
- Bob Mosley - Bass Guitar & Vocals, Moby Grape
- Robert Moss - Author
- Robert F. Mos - Author
- Robert Motherwell - Artist
- Bob Mould - Guitar
- Bobby Moynihan - Actor
- Robert J. Mrazek - Author
- Robert Mueller - Director FBI
- Robert Mugabe - Zimbabwe President
- Bob Muglia - Business
- Bob Mulder - Soccer
- Robert Mulligan - Director
- Robert S. Mulliken - Nobel Laureate in Chemistry
- Robert A. Mundell - Nobel Laureate in Economics
- Robert Munsch - Author
- Bob Murawski - Film Editor
- Bobby Murcer - Baseball
- Bob Murphy - Jazz Piano
- Robert Murphy - Mathematician
- Bob Murphy - Lakewood, Colorado Mayor
- Robert Murphy - Australian Politician
- Robert Murphy - Australian Rules Football
- Bob Murphy - Baseball
- Rob Murphy - Baseball
- Rob Murphy - Basketball
- Rob Murphy - Football
- Bob Murphy - Hockey
- Robert Murphy - Hockey
- Bobby Murphy - Soccer
- Robert A. Murphy - Sportscaster
- Robert C. Murphy - Business
- Robert C. Murphy - Ornithologist
- Robert C. Murphy - Maryland Attorney General
- Robert D. Murphy - US Diplomat
- Robert F. Murphy - Anthropologist
- Robert F. Murphy - Professor
- Robert F. Murphy - Massachusetts House of Representatives
- Irish Bob Murphy - Boxer
- Robert J. Murphy - Golf
- Robert K. Murphy - Rower
- Robert M. Murphy - Football
- Robert P. Murphy - Economist
- Robert R. Murphy - Hockey
- Robert S. Murphy - Pennsylvania Lieutenant Governor
- Robert Gray Murray - Artist
- Robert Fuller Murray - Author
- Robert P. Murray - Violin
- Robert Murray - Business
- Robert Murray - Business
- Robert Murray - British Navy
- Robert Murray - Scottish Military
- Robert Murray - Educator
- Robert Murray - Scottish Politician
- Robert Murray - Scottish Politician
- Robert Murray - Scottish Politician
- Robert Murray - Hockey
- Robbie Murray - Boxer
- Rob Murray - Soccer
- Robert Murray - Soccer
- Robert Murray - Soccer
- Robert Allan Murray - Hockey
- Robert Charles Murray - US Army
- Robert Cook Murray - Sport Shooter
- Robert E. Murray - Business
- Robert E. Murray - Maine Senate
- Robert Frederick Murray - Hockey
- Robert J. Murray - US Under Secretary of the Navy
- Robert John Murray - Hockey
- Robert Lindley Murray - Tennis
- Robert Maynard Murray - US House
- Robert Sydney Murray - Business
- Robert W. Murray - Australian Rules Football
- Robert Musil - Author
- Bob Myers - Basketball
- Bobby Myers - Motor Sports
- Robert E. Myers - Music Producer
- Robert J. Myers - Social Security Creator