List of nicknames of European royalty and nobility: N-O
- Napoleon I of France Boney, Corporal Violet, Father Violet, Jupiter Scapin, Napoglione Paille au Nez (Napoleon Straw-in-the-Nose) , That Corsican Ogre, the Armed Soldier of Democracy, the Corsican General, the Emperor of Elba, the Enlightened Despot, the Great, the Horse Thief of Berlin, the Little Corporal, the Little Corsican, the Little General, the Man of Destiny , the Modern Alexander, the Modern Hannibal, the Nightmare of Europe, the Ogre, the Representative (of) Men, the Straw-in-the-Nose (Fr. Paille au Nez), the Victor of Marengo 1 2 3 45 6 7 8
- Napoleon II of France the Baby Eagle, the Eaglet
- Napoleon III of France Boustrapa Comte d'Arenenberg Conscience Tranquelle, Little Napoleon the Small, Grosbec (Nosey), Ratipole, Ratipol, Verhuel, the Arbiter of Europe, the Arch-monarch of the World, Badinguet, the Little, the Small, the Man of December , the Man of Sedan, the Sedantaire , the Man of the Third Republic, the Man of Silence the Socialist on Horseback
- Napoleon Joseph Charles Paul Bonaparte Craint Plomb (Fear-Lead), Plon-Plon 9
- Natasha the Old the Old 10
- Naya of Malaga the Usurper 11
- Nell Gwyn Madam Gwyn, Old Madam Gwyn, Pretty, Witty Nell (Samuel Pepys), the Most Famous Restoration Actress of All Time (Elizabeth Howe), the Protestant [...] 12
- Nero the Olympic Champion 13 14
- Nero Claudius Drusus the Elder
- Neri the vice
- Nerva the Adoptive Emperor
- Nest verch Rhys the Helen of Wales, the Helen of Troy of Wales
- Nevşehirli Damat İbrahim Pasha Nevşehirli (From Nevşehirli")
- Niall of the Nine Hostages Niall of the Nine Hostages (Noiggiallach) 15
- Niall III of Ailech, 36th King of Ireland Caille
- Niall Glúndub Black Knee, Glundubh
- Niall, King of Ulster, 1364–1394 the Big
- Niall, King of Ulster, 1394–1403 the Younger
- Niall More O'Neill, Lord of Tyrone the Destroyer of the English, the Exalter of the Church, the Uniter of the Irish
- Niall Frossach of the Showers
- Niall O'Neill, King of Ulster, 1230 the Red
- Niall of the Nine Hostages the Great
- Nicephorus I the Alarmed, the General, the Great Logothete, the Logothete
- Nicephorus II, Byzantine Emperor Nikfour, the Artisan of Good Victories (Gr. Killinikos), the Pale Death of the Saracens
- Nicephorus III, Byzantine Emperor Botaniates
- Nicholas I of Montenegro the Father-in-law of Europe
- Nicholas I of Russia the Don Quixot of Russian Absolutism, the Iron Czar, the Iron Hand. the Policeman of Europe, , the Iron Emperor <!--"...He was a great adherent of various court entertainment; for him it was part of the image of the powerful and prosperous Empire, where the Court had to amaze with brilliance, elegance, luxury and grandeur...."--
- Nicholas II of Russia Bloody Nicholas, the Martyr
- Nicholas III Radziwill, Prince of Goniadz and Medely Poland's Darling (Amor Poloniae):
- Nicholas, Lord of Avesnes the Handsome 18
- Nicholas, Duke of Mecklenburg in Rostock, 1282–1314 the Child
- Nicholas of Silesia "The Little", "Small"
- Niccolò II d'Este the Cripple, the Lame 19
- Nicolas Jean de Dieu Soult Premier Manœuvrier de l'Europe , the Iron-Arm , the Iron Hand 20, the Iron Marshal , the Duke of Damnation 21, le Roi Nicolas
- Nicolas Oudinot the Marshal With Thirty-Five Wounds , the Modern Bayard , the Most Wounded Marshal 22, the Bayard of the French Army 23
- Nicolas of Estouteville (d.1416), Lord of Torcy Colart 24
- Nigel d'Aubigny (1066–1129) Scutifer Conquestoris
- Nikola Zrinski the Poet-Warlord 25
- Nikolaus II Priscus Radziwiłł Mathusalem 26
- Nikolaus III Radziwiłł Amor Poloniae 27
- Nikolaus Esterházy the Lover of Splendor 28, the Magnificent 29 30
- Nino Visconti the Brigand 31
- Nithard Nithard of Ponthieu, the Chronicler, the Historian
- Nivelon I, Count of Autun (d.768) the Historian
- Nuño González, Lord of Lara (d.1275)
- Nuño Nuñez of Castile He of Brasera, He of Branosera (Sp. El de Brasera, El de Branosera) 32
- Nuño Nuñez, Count of Castile He of Castrogeriz (Sp. El de Castrogeriz) 33
- Nuno Álvares Pereira the Constable-Saint, the Count-Saint, the Holy Constable, the Portuguese Cid 34 35
- Nuño Nuñez of Castile He of Roa, Rasura 36
- Nuño Nuñez of León, Count of Amaya, c.954 Rasura
- Nuño of Leon Belchides, son of Ordoño I of Leon
- Nuno Álvares Pereira the Great Constable
O
- Oberto, Margrave of Massa and Corsica Brattoporrata, Brotoporrada 37
- Obizzo, Margrave, c1108 Malnitpore 38
- Ocko I of East Frisia the Elder
- Ocko II, Count of East Frisia the Younger
- Odet de Coligny Cardinal de Chatillon, the Protestant Cardinal 3940 41
- Odette de Champdivers la Petite Reine
- Odo II of Blois le Champenois 42
- Odo, Count of Paris Capet
- Odo, Count of Valois (d.c.1085) the Mad
- Odo of Apulia the Good Marquis
- Odo of Aquitaine the Great
- Oddone (d.1104) Altasapada 43
- Olaf I of Denmark le Famelique, Olaf Hunger
- Olaf I of Norway the Sleeper, the Sleeping Hero, the Sleeping King
- Olaf I of the Isle of Man Morsel, the Dwarf
- Olaf II of the Isle of Man the Black 44
- Olaf Cuaran Hairy Brogues, Sandals 45
- Olaf Haraldsson Geirstadalf Olaf II, King of Vestfold and Jutland, the Elf of Geirstad (Nor. Geristad-alf, Geirstada-Alf, Geirstadaalf)
- Olaf Ingjaldsson, King of Dublin (835–871) the White
- Olaf of Denmark the Mild
- Olav I, King of the Isle of Man, 1097–1153 the Red
- Olav II of Norway the Big One, Digera, the Chapman, the Fat, the Saint, the Seaman
- Olav III of Norway the Mild, the Pacific 46
- Olav IV of Norway Harefoot
- Olav V of Norway the People's King
- Oleg I, Prince of Novgorod-Severskiy, 1097–1115 the Infamous
- Oleg I, Prince of Riazan, 1252–1258 Krasniy, the Fair, the Handsome 47
- Oleg II, Prince of Riazan, Grand Prince of Riazan, 1389–1402 the Great
- Oleg of Novgorod the Knowing, the Seer, the Wise
- Oleg Svyatoslavich, Prince Chernigov Gorislavich 48 4950 51
- Olga of Kiev Preskasa, the Beauty, the Saint 52 53
- Oliver Cromwell Crum-Hell, Ironsides , Nosey, Old Ironsides, Old Noll, Ruby Node, the Almighty Nose, the Archangel Who did Battle with the Devil, the Lord Protector of the Commonwealth 54 55
- Olivier de Clisson the Butcher
- Oliver St John the Dark Lanthorn of the Commonwealth56
- Olof of Sweden the Lap King , the Tax King, the Treasurer'' 57
- Olof Trätälja the Tree-Cutter, the Tree-Hewer, the Tree-Feller, the Wood-Cutter 58
- Olof the Sharp-sighted
- Ordoño IV of Leon the Bad, the Hunchback
- Orhan I the Fighter, the Hero of the Religion, the Leader, the Ruler, the Warrior of the Faith 59
- Orielda of Tirel the Noble Lady, wife of Fulk de Tirel, son of Ralph, Lord of Tirel and Poix
- Orlando of Fidenza the Magnificent
- Orlando Pallavicini (c1393-1457) the Magnificent 60
- Oshin of Armenia the Regent
- Osman I Little Osman, the Black, the Dark, the Fighter, the Founder, the Holy Warrior, the Pride of the Religion 61 62 63 64
- Osman I, King in Bithynia, 1282–1326 the Warrior of the Faith
- Osman II Farisi, the Martyr, the Younger, the Young Osman 65 66
- Oswald of Northumbria the Saint
- Oswine of Deira the Saint
- Ottar of Sweden Wend-crow
- Ottaviano degli Ubaldini the Cardinal 67
- Otto I of Bohemia (d.1091), Duke of Olmutz the Handsome
- Otto I, Count of Guelders (1150–1207) the Great
- Otto I, Duke of Brunswick-Göttingen, 1367–1394 the Evil
- Otto I, Duke of Brunswick-Lüneburg (1204–1252) the Child
- Otto I, Duke of Brunswick-Luneburg, 1434–1445 the Lame
- Otto I, Duke of Saxony the Magnificent
- Otto I, Holy Roman Emperor the Great, the Pious 68
- Otto II, Count of Habsburg
- Otto II (VI), Duke of Brunswick-Göttingen, 1367–1394 the Bad
- Otto II, Duke of Brunswick-Luneburg the Generous, the Liberal, the Magnanimous, the Victorious
- Otto II, Duke of Luneburg, 1464–1471 the Magnificent
- Otto II of Guelders Horsefoot 69
- Otto II, Holy Roman Emperor the Bloody, the Red (Rufus) 70
- Otto II, Margrave of Brandenburg (1147–1205) the Spendthrift, the Extravagant
- Otto II, Marquess of Montferrat, 1372–1378 Secondotto
- Otto II Wittelsbach, Duke of Bavaria the August, the Noble
- Otto III, Duke of Swabia Otto of Schweinfurt, the White
- Otto III, Margrave of Brandenburg, 1220–1267 the Pious
- Otto III, Holy Roman Emperor the Infant, the Wonder of the Age, the Wonder of the World (Lat. Stupor Mundi), the World's Wonder 71 72
- Otto IV of Brandenburg Otto with the Arrow, Sagittarius
- Otto IV, Holy Roman Emperor Otto of Brunswick, the Proud
- Otto IV of Kirchberg the Great
- Otto IV, Duke of Bavaria der Abbacher
- Otto V, Duke of Bavaria, the Bavarian, the Lazy, the Pimple
- Otto of Austria the Well-Beloved, the Merry
- Otto, Duke of Brunswick-Göttingen, 1394–1463 the Blind
- Otto of Austria the Wise
- Otto of Bamberg the Father of Monks, the Saint
- Otto of Nordheim Otto of Northeim
- Otto von Bismarck the Founding Father, the Man of Blood and Iron , the Iron Chancellor
- Otto-Henry, Duke of Burgundy the Great
- Ottokar I of Bohemia the Victorious
- Ottokar II of Bohemia the Iron and Gold King, the King of Gold and Iron 73
- Owain Goch ap Gruffydd the Red
- Owain Danwyn the White Tooth
- Owain ap Thomas, Prince of Gwynedd the Red Hand
- Owain Lawgoch Owain of the Red Hand
