MA ———
Maas MacAdam MacAllen MacCrimmon(/McCrimmon) MacDonald(/McDonald) MacGregor Machuca MacIntyre Mack MacKay MacKenzie Mackey Mackin MacKintosh MacLaren MacLean MacLennan MacMurtrie MacPherson(/McPherson) MacRae MacTaggart Macumber Madaris Madden Maddern Maddox Madole Madore Magee Magill Maher Mailly Maines Maitland Major Mallory Malone Malloney Mangifesta Mankiller Manley(/Manly) Manning Manno Manry Mansker Mantavoni Mantesso Marchant Marker Markland Marks Marlia Marlo Marquis Marriott Marsal Marsee Marshall Marston Martin Martyr Maskell Mason Massey Mather Matheson Mathews(Matthews) Mathieu Matlock Matteson Matthews Mattia Mault Maurath(/Maurat Marat Morat Murat Myrot) Mayes Mayfield Maynarich Mays Maxon Mazza Mazzetti

MC ———
McAdam McAleavy McAllister McAllen McAlpin McAlpine McAndrew McArdle McAvan McAvoy McBain(/McBean) McBee McCabe McCall McCallum McCandless McCann McCarthy McCartney McCaskey McClain McClelland McCloud McClure McClurken McConnell McCord McCoy McCraken McCullough McCurdy McDaniel McDonald McElhaney McElhone McElron McEwan McFadden McGee McGillis McGowan McIlvaine McInnish McIntire(/McIntyre McIntyre MacIntire MacIntyre McIntier) McIntosh McIver McKain McKean McKee McKelvey McKemie (/McKamiie, McKamy, McKemmie, MacKymmie) McKenney McKenzie McKie McKiernan McKenney McKibben McKinley McKinnon McLeaird McLeod McLellan McLennan McLinden McMahan McManigle McManus McMillan McMillin McMills McNamara McNutt McPherson McPheters McVay(/McVey/McVeigh) McWilliams

ME ———
Mead/(Meade) Meadows Mears Meddemmen Medders Meeboer Meeker Mefflin Mefford Mehringer Meise Meiser Meisser Melon Melton Melvin Menary Mendenhall Mendes Mentzer Memheld Menzak Menzies Meredith Merideth Meroney Merrifield Merrill Merritt Merry Merys Meserole Meshekinoquah Messemer Messenger Messer Messersmith Metcalf Metz Meyer

MI ———
Michael Michaels Michaelis Michels Michell Miesterfeld Mieur Middlebrooks Mileski Millard Miller Millet Milliken Millirons Mills Milstead Minder Minerd Minge Minor Miranda Mischler Miser Misner Mitchell Mittendorf Mittge Mix Mixer Mizer

ML ———
Mlejnek

MO ———
Mobley Mock Moe Moeller Moellinger Mohan Mole Molgaard Moller Molyneux Monaghan Monroe Montgomery Moody Moon Moor Moore Moorehouse Moorer Moquin Moran Moreau Morey Morgan Morelock Morkill Morris Morrison Morrow Morse Morton Moseley Moseley Mosely Mosher Moss Mothershead Mould Moule Moulton Mount Mountfort Moyer Mozhayski(/Mozarowski)

MU ———
Mudge Mueller Muench Muir Muller Mullins Mulloy Multer Mulvihil Mumma Munn Munoz Munro Munsell Munson Murchison Murdock Murphy Murray Murrow Murry Musetti Mutchler Muth

MY ———
Myatt Myers Myzer