- MacDermott
- Machell
- Mackenzie
- Mackinnon
- Madgewick
- Madgwick
- Magilton
- Mahomet/Mahomed
- Mahon
- Maloney
- Malthouse
- Mann
- Manning
- Mant
- Mantell, Gideon Algernon
- Manwood
- Marchant
- Margary, Ivan Donald
- Marinus
- Markwick
- Marsh
- Marshall
- Martin/Marten
- Martlew
- Martyr
- Mascall
- Mason
- Mason, Charlotte Maria Shaw
- Matcham
- Maxse
- May
- Maycock
- Maycote
- Mayfield/Maghfeld/Mawefeld/Maufeld
- Maynard
- McBride
- McIndoe, Sir Archibald Hector
- McMahon
- Meade
- Medhurst
- Medley
- Medsted
- Medwin
- Meek
- Meeres
- Mellersh
- Mellon
- Meopham
- Mercer
- Meres/Meeres
- Merrick
- Merrifield
- Mervyn
- Mesley
- Methold
- Michelborne
- Michell/Machell/Mitchell
- Middleton
- Midmore
- Migeod
- Miles
- Millais
- Miller
- Mills
- Milne, Alan Alexander
- Mitford
- Mitson
- Moleyns
- Mollen
- Molson
- Montacute
- Montague
- Montgomery
- Moon
- Moore
- Morden
- More
- Morgan
- Morley
- Morris
- Mortimer
- Mossop
- Mowcomber
- Mugridge
- Murdock
- Murray
- Mustchin
