- Mabry, Margaret
- MacDougal, Bill SEE: Old Fashioned Revival Hour Quartet
- Mace, Lee
- Macedonian Quartet
- Mac-o-chee Valley Folks SEE: Various Artists (Skinners Music Shop)
- Maddox, Rose
- Maddox Brothers & Rose
- Mae, Kennia
- Magic Valley Quartet
- Magness, Tommy
- Magnifiers Quartet
- Mahaffey, Boone
- Maharrey Family
- Mainer, J.E.
- Mainer, Wade
- Majestics Quartet
- Male Quartet
- Mallett Brothers
- Mallie Anne & Slim
- Mani Strings Singers
- Mann, Kitty
- Maphis, Joe
- Maple Leaf Quartet SEE: Harmoneers Quartet
- Maples, Roy SEE: Country Gospel Singers [Michigan]
- Marcell, Sonny
- Marcum Quartet
- Margaret & Spanck SEE: Faith Four
- Mariners Gospel Quartet
- Marion, Rev. C.G.
- Mark IV Quartet
- Marksmen Quartet
- Markwood Brothers
- Marlowe, Edith & Sam
- Marlowe, Sam, Sr.
- Marsh Family Singers
- Marshall, S.
- Marshall, Sonny
- Marshall Family
- Martin, Buddy
- Martin, Carl
- Martin, Dude
- Martin, Ernest
- Martin, Faye SEE: Various Artists (Rubytone Sacred)
- Martin, James
- Martin, Jimmy
- Martin, Slim
- Martin, Zane
- Martin Family
- Martin Sisters
- Mary Ann & All Star Quartette
- Massengale Family
- Massey, Charlie
- Massey, Delbert
- Master-Workers Quartet
- Masters
- Masters Family
- Master's Keys
- Masters Musical Four
- Masters Quartet [Georgia]
- Masters Quartet [Illinois]
- Masters Quartet [Maryland]
- Masters Quartet [North Carolina]
- Master's Quartet
- Masters Three
- Mathias Brothers Trio
- Mathis, Alfred
- Mathis, Johnny
- Matneys SEE: Singing Matneys
- Matthews, Roberta
- Matthew Brothers
- Matthews Brothers Quartet
- Mattsville Quartet
- Mauldin Family
- Maxwell, Henry
- May, Grady
- May, J.R.
- May Sisters
- Maybelle & Burley Trio
- Maynard, Irene SEE: Donna, Jean, & Irene
- Maynard Sisters Trio
- Mays, Jim SEE: Country Four Quartet
- Mays, Wilson, Jr.
- McAn, Tom Dee
- McAuliff, Leon, 11 SEE: Various Artists (Roy)
- McCall, Jim SEE: Various Artists (Skinners Music Shop)
- McCall Family
- McClain, Truzella
- McColl-Gerard Evangelistic Party
- McComas, Kenny SEE: Southland Gospel Trio [California]
- McComas Quartet
- McCool, Billy & Betty
- McCormick, Mac
- McCormick Gospel Singers
- McCoury, Finley & Edith
- McCowan, Homer
- McCoy, Junior
- McCoy, Otis
- McCoy, Red
- McCoy, Tully
- McCrary Trio
- McCravy, Frank & James
- McCravy Brothers SEE: McCravy, Frank & James
- McCraw Family
- McCreary County Travelers
- McCullah, Earl
- McCullough, Marvin
- McDaniels, Elestine
- McDonald Brothers
- McDonald Brothers Stamps Quartet SEE: McDonald Brothers
- McDowell, Charlie
- McDowell, John
- McDuff Brothers Quartet
- McFalls, Fred
- McFarland, Don
- McFarland, Elijah H.
- McFarland, Judy SEE: McFarland, Elijah H.
- McGee, Kirk
- McGee, Ronald
- McGee, Sam SEE: Various Artists (Diplomat); Various Artists (Guest Star); Various Artists (Starday); Various Artists (Wyncote)
- McGinnis, Agnes
- McGlothens
- McGuire, Mac
- McHan, Don
- McKelvey Quartet
- McKendrie, Betty
- McKiney Family
- McKinney Sisters
- McKinnon, Alex
- McManus, Otis
- McManus, Willis
- McNew, Fred
- McQueen, Cager
- McQueen Sisters
- McRae, Arvis & Kathlene
- McReynolds, Jim & Jesse
- Mel & Stan
- Mellotones
- Mello-Tones
- Mellowtones Quartet
- Melody Aires Quartet [Georgia]
- Melody Aires Quartet [Ohio]
- Melody Boys Quartet
- Melody Four
- Melody Four Quartet
- Melody Girls
- Melody Makers Quartet
- Melody Masters Quartet [California]
- Melody Masters Quartet [Kentucky]
- Melody Masters Quartet [Nebraska]
- Melody Masters Quartet [North Carolina]
- Melody Masters Quartet [Ohio]
| - Melody Masters Quartet [loc?]
- Melody Men Quartet
- Melody Quartet
- Melody Sisters
- Melody Trio
- Melodyaires Quartet
- Melody-aires Quartet
- Melody-ettes
- Melodymen Quartet
- Melotones
- Mel-o-tones Quartet
- Memphians
- Men From Mars
- Men Of Madison
- Mercer, B.A.
- Merrell, Bob
- Messengers [Ohio]
- Messengers [Oklahoma]
- Messengers [West Virginia]
- Messengers Quartet [Georgia: East Point]
- Messengers Quartet [North Carolina]
- Messengers Quartet [Virginia]
- Messer, Landon SEE: Parsley, Albert
- Messer, Richard
- Messer Sisters
- Messner, Bud
- Metcaff, Rachel SEE: Rocky Ridge Quartet
- Meyers, Willis
- Miami Valley Quartet
- Mickelson, Paul SEE: Hamblen, Stuart
- Mikey & Bobby
- Miles, Charles
- Miles, Phil
- Miller, Bill
- Miller, Dale
- Miller, Darnell SEE: Various Artists (Design); Various Artists (Starday)
- Miller, Ervin L.
- Miller, Flora
- Miller, Frankie
- Miller, Richard
- Miller Brothers [Kentucky]
- Miller Brothers [Michigan]
- Miller Brothers [loc?]
- Miller Family
- Millet, Lou
- Million $ Quartet
- Millner, Welon
- Mills, Oliver SEE: Sanders Family
- Mills, Robert
- Minor, Dave
- Miracle Men
- Mission Covenent Church
- Mission Gospel Singers
- Mission-aires
- Missionaires
- Missionaires Quartet
- Missionaires Quartette
- Missionettes
- Mitchell, Betty
- Mitchell, Brother
- Mitchell Family
- Mizer, Sherman SEE: DeVore, Joyce
- Mobley, Jess
- Mobley Sisters
- Monroe, Bill
- Monroe, Charlie
- Monroe, Smiley
- Monroe Gospel Quartet
- Montgomery, Harold
- Montgomery, Melba
- Montgomery, Paul
- Moody, Clyde
- Moody, Dwight & Cathy
- Moody, W.A.
- Mooney, Clyde SEE: Various Artists (New American)
- Moonliters
- Moore, Arthur
- Moore, Charlie
- Moore, Dennis
- Moore, Doc
- Moore, Lattie
- Moore, Lee
- Moore, Lydia
- Moore, Mel
- Moore, Spencer
- Moore, Ve Ron
- Moore, Willa Jean
- Moore, William
- Moore & Napier SEE: Moore, Charlie
- Moore Brothers
- Moore Family
- Moores
- Moreland Sisters
- Morgan, Billy Don
- Morgan, George
- Morgan, George W., III
- Morgan, June
- Morris, Bob
- Morris, Deacon
- Morris, Jackie
- Morris, Melvin
- Morris, Mildred
- Morris, Stan & Marilyn
- Morris, Sterling
- Morris Brothers
- Morris Family
- Morrison, Eunice
- Morss, Wayne
- Morton Sisters
- Moscheo, Joe, II SEE: Prophets Quartet
- Moseley, Semie
- Moses, Johnny
- Moses Family
- Mounce, Eddie SEE: Various Artists (Broadcast Record Club)
- Mt. Olive Quartet
- Mountain Four
- Mountain State Gospel Trio
- Mountain View Quartet
- Mountaineers
- Mounts Family
- Mulkey Family
- Mullett, Ed & Dora SEE: Copley, Mrs. Milender
- Mullican, Moon
- Mullins, Juanita
- Mullins, Moon SEE: Various Artists (Skinners Music Shop)
- Mullins, Paul
- Mullins, Ted
- Mullins Family
- Mullis, Calvin
- Muncy Brothers
- Murdock Brothers
- Murie, Donna
- Murphy, Clyde
- Murphy, Fred
- Murphy, Jimmy
- Murphy, L. SEE: Murphy Family [Georgia]
- Murphy Family [Georgia]
- Murphy Family [Ohio]
- Murphy Trio
- Murphys
- Muse, Gary
- Music City Trio
- Musical Cudes
- Musical Lewis Family SEE: Lewis Family
- Musical Messengers
- Musical Milbourns
- Musical Millers Quartet
- Myers SEE: Singing Myers
- Myers, Bob
- Mynatt Road Boys & Jean
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