The 194 most-researched names
- Ma Chinese
- Macdonald Scottish
- Machado Portuguese
- Macias Spanish
- Mack Scottish
- Mackey Scottish
- Madden Irish
- Maddox Welsh
- Madison English
- Madrid Spanish
- Madrigal Spanish
- Magana Spanish
- Magee Irish
- Maher Irish
- Mahoney Irish
- Major English
- Maldonado Spanish
- Malone Irish
- Maloney Irish
- Manley English
- Mann German
- Manning English
- Mansfield English
- Manuel
- Marin Spanish
- Marino Italian
- Marks English
- Marquez Spanish
- Marrero Spanish
- Marroquin Spanish
- Marsh English
- Marshall English
- Martin English
- Martinez Spanish
- Mason English
- Massey English
- Masters English
- Mata Spanish
- Mathews
- Mathis French
- Matos Portuguese
- Matthews
- Maurer German
- Maxwell Scottish
- May English
- Mayer German
- Mayes English
- Mayfield English
- Maynard English
- Mayo English
- Mays English
- McAllister Scottish
- McBride Scottish
- McCabe Irish
- McCain Scottish
- McCall Scottish
- McCann Irish
- McCarthy Irish
- McCarty Irish
- McCauley Irish
- McClain Scottish
- McClellan Scottish
- McClendon Scottish
- McClure Scottish
- McCollum Scottish
- McConnell
- McCormick Scottish
- McCoy Irish
- McCracken Scottish
- McCray Scottish
- McCullough Scottish
- McDaniel Scottish
- McDermott Irish
- McDonald Scottish
- McDonough
- McDowell Scottish
- McElroy Irish
- McFadden Scottish
- McFarland Scottish
- McGee Irish
- McGhee Scottish
- McGill Scottish
- McGinnis Irish
- McGowan Irish
- McGrath Irish
- McGraw Irish
- McGuire Irish
- McHugh Irish
- McIntosh Scottish
- McIntyre Scottish
- McKay Scottish
- McKee Irish
- McKenna Irish
- McKenzie Scottish
- McKinley Scottish
- McKinney Scottish
- McKnight Scottish
- McLaughlin Irish
- McLean Scottish
- McLeod Scottish
- McMahon Irish
- McManus Irish
- McMillan Scottish
- McMullen Scottish
- McNamara Irish
- McNeal Scottish
- McNeil Scottish
- McNeill Scottish
- McPherson Scottish
- McQueen Scottish
- McRae Scottish
- McWilliams Scottish
- Mead English
- Meade Irish
- Meadows English
- Medeiros Portuguese
- Medina Spanish
- Medrano Spanish
- Meeks English
- Meier German
- Mejia Spanish
- Melendez Spanish
- Melton English
- Melvin Scottish
- Mena Spanish
- Mendez Spanish
- Mendoza Spanish
- Mercado Spanish
- Mercer English
- Meredith Welsh
- Merrill
- Merritt English
- Messer German
- Metcalf English
- Metz German
- Metzger German
- Meyer German
- Meyers German
- Meza Spanish
- Michael Jewish
- Michel French
- Middleton English
- Miles English
- Miller English
- Milligan Scottish
- Mills English
- Milton English
- Mims English
- Miner English
- Minor English
- Miranda Spanish
- Mitchell English
- Mobley English
- Mohamed Arabic and Persian
- Molina Spanish
- Mondragon Spanish
- Monroe Scottish
- Montalvo Spanish
- Montano Italian
- Montes Spanish
- Montgomery Scottish
- Montoya Spanish
- Moody English
- Moon English
- Mooney Irish
- Moore English
- Mora Spanish
- Morales Spanish
- Moran Irish
- Moreno Spanish
- Morgan Welsh
- Morin French
- Morris English
- Morrison Scottish
- Morrow
- Morse English
- Morton English
- Moser German
- Moses Jewish
- Mosley English
- Moss English
- Moyer German
- Mueller German
- Muhammad Arabic and Persian
- Mullen Irish
- Muller German
- Mullins Irish
- Muniz Spanish
- Munoz Spanish
- Murdock Scottish
- Murillo Spanish
- Murphy Irish
- Murray Scottish
- Myers German
Every name starting M
The census file has many more. Choose the first two letters.