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o, Count of Ballenstedt Otto I, Duke of Carinthia Otto Kleemann Otto, Count of Savoy Otto I, Duke of Saxony Walter F. Otto Otto Porter Jr. Ottó Hátszeghy King Otto (film) Otto IV, Duke of Brunswick-Lüneburg Otto IV (disambiguation) Operation Otto Otto II, Margrave of Brandenburg Frank Otto Ottó Korvin Otto Šimánek Otto. Otto II, Duke of Brunswick-Lüneburg Otto Vellingk Bill Otto (Missouri politician) Otto Ackermann Otto; or, Up with Dead People Richard Otto Archduke Otto Franz Joseph of Austria Michael Otto John Otto Frank Otto (academic) Otto of Wittelsbach Otto V, Duke of Bavaria Otto I, Duke of Merania Otto Bütschli Otto Grün Otto Sibum O