- Norton (continued)
- Norwood
- Nothnagle
- Nycholls
- Odell
- of Acre
- of Anjou
- of Antwerp
- of Aquitaine
- of Brittany
- of Brotherton
- of Caen
- of Castile
- of Clarence
- of England
- of Flanders
- of Guelders
- of Hainault
- of Huntingdon
- of Lancaster
- of Lens
- of Luxembourg
- of Normandy
- of Northumberland
- Alice

(Est 1074-Aft 1126)
- of Provence
- of Salisbury
- of Scotland
- of Woodstock
- Oldfield
- Olney
- Joan

(Abt 1628-1709)
- Osborn
- Otis
- Owens
- Packard
- Palmer
- Patching
- Patten
- Patterson
- Pawley
- Paxton
- Payne
- Pearce
- Peck
- Pedmore
- Percy
- Perkes
- Perry
- Person
- Peterson
- Peverell
- Phelps
- Pickett
- Pierce
- Plantagenet, Count of Anjou
- Platt
- Plumb
- Plympton
- Pomeroy
- Ponthieu
- Porter
- Portler
- Post
- Potter
- Powell
- Prentice
- Preston
- Prichard
- Prideaux
- Prince
- Prudden
- Pugh