Otto II, Count of Waldeck
Otto II, Count of Zutphen
Otto II, Count Palatine of Mosbach-Neumarkt
Otto II, Duke of Brunswick-Göttingen
Otto II, Duke of Brunswick-Harburg
Otto II, Duke of Brunswick-Lüneburg
Otto II, Duke of Brunswick-Osterode
Otto II, Duke of Pomerania
Otto II, Duke of Swabia
Otto II, Holy Roman Emperor
Otto II, Margrave of Brandenburg
Otto II, Margrave of Meissen
Otto II, Marquess of Montferrat
Otto II, Prince of Anhalt-Aschersleben
Otto III of Hachberg
Otto III of Northeim
Otto III of Ravensberg
Otto III van Holland
Otto III, Count of Burgundy
Otto III, Count of Rietberg
Otto III, Count of Waldeck
Otto III, Count of Weimar-Orlamünde
Otto III, Duke of Bavaria
Otto III, Duke of Brunswick-Harburg
Otto III, Duke of Brunswick-Lüneburg
Otto III, Duke of Carinthia
Otto III, Duke of Pomerania
Otto III, Duke of Swabia
Otto III, Holy Roman Emperor
Otto III, Margrave of Brandenburg
Otto III, Prince of Anhalt-Bernburg
Otto Ilenfelda
Otto Inkermann
Otto Ipinge
Otto Isakower
Otto Ites
Otto IV of Schaumburg
Otto IV, Count of Burgundy
Otto IV, Count of Ravensberg
Otto IV, Count of Rietberg
Otto IV, Count of Waldeck
Otto IV, Count of Wittelsbach
Otto IV, Duke of Brunswick-Lüneburg
Otto IV, Duke of Lower Bavaria
Otto IV, Holy Roman Emperor
Otto IV, Margrave of Brandenburg-Stendal
Otto IV, Prince of Anhalt-Bernburg
Otto I͡Ulʹevich Shmidt
Otto J Scott
Otto J. Discher
Otto J. Helweg
Otto J. M. Smith
Otto J. Maenchen-Helfen
Otto J. Mileti III
Otto J. Roos
Otto J. Wolff
Otto J. Zahn
Otto Jacob
Otto Jacobs
Otto Jaekel
Otto Jaffe
Otto Jäger
Otto Jägersberg
Otto Jahn
Otto Jaindl
Otto Jaksch
Otto James
Otto Jelinek
Otto Jensen
Otto Jeremiassen
Otto Jespersen
Otto Jesperson
Otto Jindra
Otto Jírovec
Otto Joachim
Otto Joachim Løvenskiold
Otto Joachim Moltke
Otto Jochum
Otto Johannes Adriaan de Haart
Otto Johannesen
Otto Johannessen
Otto John
Otto Johnson
Otto Jones
Otto Jongerius
Otto Joschko
Otto Josef Hofer
Otto Jr.
Otto Julius Bierbaum
Otto Julius Klotz
Otto Julius Zobel
Otto Junge
Otto Jungtow
Otto Junkermann
Otto Jürgen Hofmann
Otto Justice Baab
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