| M | 2 |
| M. | 1 |
| Mabee | 1 |
| Mabus | 5 |
| Macchia | 1 |
| MacCorkle | 24 |
| Mace | 2 |
| MacKey | 5 |
| Macmillan | 2 |
| Madden | 2 |
| Maddox | 3 |
| Maddux | 2 |
| Mades | 1 |
| Madison | 4 |
| Magan | 1 |
| Magby | 1 |
| Magie | 1 |
| Magnus | 1 |
| Magnuson | 2 |
| Mahl | 1 |
| Mahorney | 1 |
| Mains | 1 |
| Major | 1 |
| Majors | 1 |
| Mallory | 2 |
| Malone | 11 |
| Maloy | 1 |
| Malta | 1 |
| Manifold | 2 |
| Manis | 1 |
| Manley | 1 |
| Mann | 3 |
| Manning | 13 |
| Mantz | 4 |
| Manwarren | 1 |
| Marble | 2 |
| March | 1 |
| Mardick | 1 |
| Margach | 3 |
| Margrave | 1 |
| Marin | 1 |
| Markham | 10 |
| Markovich | 1 |
| Marlow | 1 |
| Marquess | 1 |
| Marquis | 1 |
| Marsh | 1 |
| Marshall | 13 |
| Marshburn | 1 |
| Martens | 1 |
| Martin | 82 |
| Martindale | 7 |
| Martucci | 1 |
| Mascisak | 1 |
| Mason | 19 |
| Massenburg | 1 |
| Massey | 4 |
| Masters | 2 |
| Mastiss | 1 |
| Masuicca | 1 |
| Matheney | 1 |
| Matheny | 1 |
| Matherly | 1 |
| Mathews | 2 |
| Mathison | 1 |
| Matthews | 11 |
| Mattison | 10 |
| Matz | 1 |
| Mauck | 9 |
| Mauk | 1 |
| Mauldin | 6 |
| Mauzy | 1 |
| Maxwell | 1 |
| May | 10 |
| Mayer | 1 |
| Mayes | 6 |
| Mayfield | 4 |
| Mayhall | 3 |
| Maynard | 3 |
| Mays | 42 |
| Mazyck | 1 |
| McAfee | 2 |
| McAndrew | 16 |
| McAtee | 2 |
| McBain | 1 |
| McBee | 1 |
| McBride | 3 |
| McCain | 3 |
| McCaleb | 1 |
| McCall | 3 |
| McCame | 1 |
| McCan | 1 |
| McCann | 3 |
| McCarroll | 1 |
| McCarthy | 3 |
| McCartney | 1 |
| McCarty | 7 |
| McCauley | 1 |
| McCay | 4 |
| McChesney | 10 |
| McClanahan | 8 |
| McClanahon | 1 |
| McClaran | 1 |
| McClellan | 3 |
| McClendon | 17 |
| McCleskey | 1 |
| McClintock | 1 |
| McCloud | 1 |
| McClung | 3 |
| McClure | 6 |
| McColum | 1 |
| McComb | 1 |
| McCombs | 3 |
| McConnell | 1 |
| McConnico | 3 |
| McCord | 3 |
| McCorkle | 54 |
| McCormack | 4 |
| McCormick | 65 |
| McCormick-Goodhart | 8 |
| McCourtney | 1 |
| McCown | 1 |
| McCoy | 11 |
| McCracken | 1 |
| McCrary | 1 |
| McCready | 2 |
| McCreary | 1 |
| McCright | 1 |
| McCue | 2 |
| McCullar | 1 |
| McCulley | 2 |
| McCulloch | 1 |
| McCullough | 3 |
| McDaniel | 16 |
| McDonald | 10 |
| McDonnel | 1 |
| McDowell | 2 |
| McElroy | 2 |
| McElwee | 1 |
| McEntire | 1 |
| McEwan | 1 |
| McFarland | 1 |
| McFetridge | 1 |
| McGaughey | 2 |
| McGeath | 1 |
| McGee | 4 |
| McGinnis | 2 |
| McGinniss | 4 |
| McGlothlin | 1 |
| McGough | 1 |
| McGrann | 2 |
| McHenry | 8 |
| McInnis | 5 |
| McIntire | 8 |
| McIntosh | 10 |
| McIntyre | 4 |
| McKaig | 1 |
| McKann | 1 |
| McKasson | 1 |
| McKee | 1 |
| McKeen | 1 |
| McKenzie | 5 |
| McKinney | 13 |
| McKinnin | 1 |
| McKinzie | 1 |
| McKissack | 2 |
| McKnight | 1 |
| McLarry | 2 |
| McLaughlin | 2 |
| McLean | 1 |
| McLendon | 1 |
| McLeod | 1 |
| McLin | 2 |
| McLouth | 1 |
| McMahan | 3 |
| McMann | 1 |
| McMichael | 2 |
| McMillan | 3 |
| McMillon | 2 |
| McMinn | 1 |
| McMurry | 1 |
| McNally | 1 |
| McNeely | 2 |
| McNeilly | 2 |
| McNew | 1 |
| McNutt | 30 |
| McPherson | 4 |
| McQueen | 3 |
| McRae | 11 |
| McRaney | 2 |
| McRay | 1 |
| McReynolds | 1 |
| McSpadden | 1 |
| McSweeney | 1 |
| McWhirt | 1 |
| McWhorter | 2 |
| McWilliams | 7 |
| McWillie | 1 |
| Mead | 6 |
| Meador | 9 |
| Means | 1 |
| Mecke | 1 |
| Medhurst | 1 |
| Medill | 1 |
| Medlock | 1 |
| Meehan | 1 |
| Meek | 1 |
| Meeker | 1 |
| Meeks | 1 |
| Mees | 1 |
| Meharg | 1 |
| Meisel | 1 |
| Melby | 1 |
| Mellinger | 3 |
| Melton | 1 |
| Melvin | 1 |
| Menick | 1 |
| Mercer | 2 |
| Meriwether | 2 |
| Merriman | 1 |
| Merser | 1 |
| Messer | 4 |
| Metcalf | 1 |
| Metters | 1 |
| Metzger | 2 |
| Meyer | 4 |
| Meyers | 2 |
| Michael | 1 |
| Middlebrook | 1 |
| Middleton | 1 |
| Miers | 3 |
| Miffleton | 2 |
| Milanovich | 4 |
| Milbank | 1 |
| Miley | 1 |
| Millar | 2 |
| Miller | 69 |
| Milligan | 1 |
| Millikan | 1 |
| Mills | 2 |
| Milner | 1 |
| Miltimore | 1 |
| Minden | 1 |
| Minge | 3 |
| Mingea | 1 |
| Minnick | 4 |
| Minniece | 1 |
| Minor | 2 |
| Mish | 3 |
| Miskolczy | 2 |
| Mitchell | 25 |
| Mixon | 1 |
| Mize | 1 |
| Mizell | 1 |
| Mock | 3 |
| Moeller | 1 |
| Moench | 1 |
| Moffatt | 1 |
| Moffett | 6 |
| Moffit | 1 |
| Mogila | 1 |
| Mohler | 4 |
| Mohon | 2 |
| Monarch | 1 |
| Monday | 5 |
| Monighan | 1 |
| Monroe | 1 |
| Monteith | 5 |
| Montgomery | 26 |
| Montogmery | 1 |
| Moody | 12 |
| Moon | 1 |
| Mooney | 2 |
| Moor | 1 |
| Moore | 46 |
| Moores | 2 |
| Moorhead | 1 |
| Moorman | 2 |
| Moothart | 1 |
| Morancy | 1 |
| Morehouse | 1 |
| Morgan | 19 |
| Moriarty | 1 |
| Morley | 1 |
| Moroney | 1 |
| Morris | 15 |
| Morrison | 13 |
| Morrow | 4 |
| Mortimer | 5 |
| Mosby | 3 |
| Moseley | 5 |
| Mosey | 1 |
| Mosier | 3 |
| Mosier-Dalton | 1 |
| Mosley | 1 |
| Moss | 4 |
| Mott | 2 |
| Mottley | 7 |
| Moulder | 1 |
| Mouritz | 1 |
| Mowat | 1 |
| Mudd | 1 |
| Muehl | 1 |
| Muir | 1 |
| Mulkey | 1 |
| Mull | 1 |
| Mullen | 3 |
| Muller | 2 |
| Mullican | 1 |
| Mullinax | 1 |
| Munday | 2 |
| Munger | 3 |
| Munson | 2 |
| Murfee | 1 |
| Murphee | 4 |
| Murphy | 10 |
| Murray | 3 |
| Murzyn | 1 |
| Mydleton | 1 |
| Myers | 31 |
updated - GMB 06/16/07