<nowiki>Guillermo de Orange; Guillaume des Pays-Bas; Guillem d'Orange; Guillermu d'Orange; Виллем; Vilém Oranžský; Wilhelm von Oranien-Nassau; Príncipe Guilherme dos Países Baixos; Вілем; ویلیم، شاهزاده اورانژ; 威廉王子; Vilhelm af Nederlandene; Wilhelm, Prinț de Orania; ウィレム・ファン・オラニエ＝ナッサウ (1840-1879); Guilherme, Príncipe de Orange; William, Prince of Orange; וילם, נסיך אורנז'; Wilhelm Holenderski; Wilhelm av Oranje-Nassau; Willem van Oranje-Nassau; Віллем Ніколас Олександр; Guglielmo di Orange-Nassau; William, Prince of Orange; William; William, Prince of Orange; Vilhelmo de Oranĝo-Nasaŭo; Γουλιέλμος διάδοχος της Ολλανδίας; Willem van Oranje-Nassau; principe olandese; オランダのオラニエ公 (1840-1879); Prinz von Oranien-Nassau, Prinz der Niederlande, und ältester Sohn des Königs Wilhelm III.; príncipe de Orange e dos Países Baixos; Dutch and Luxembourger royal heir (1840–1879); Oranje prensi (1849-1879); Heredero al trono de los Países Bajos y Luxemburgo (1849-1879); Prins van Oranje (1840–1879); Willem Nicolaas Alexander Frederik Karel Hendrik de Orange-Nassau; オランダ王太子ウィリアム; ウィレム・ファン・オラニエ＝ナッサウ; Prince Willem, Prince d’Orange; Vilhelm av Nederlandene; Guillermu de los Paises Baxos; Guillermu d'Holanda; Wilhelm Nikolaus Alexander Friedrich Karl Heinrich von Oranien-Nassau; Wilhelm, Prinz zu Orange; Prinz Wilhelm, Prinz zu Orange; Willem, Prinz zu Orange; Prinz Willem, Prinz zu Orange; Guilherme Nicolau Alexandre Frederico Carlos Henrique de Orange-Nassau; Guilherme, Príncipe de Orange; Prince William of the Netherlands; Prince William of the Netherlands, The Prince of Orange; Prince William, The Prince of Orange; Prince Willem, Prince of Orange; Prince Willem of the Netherlands; Prince Willem of the Netherlands, The Prince of Orange; Prince Willem, The Prince of Orange; Willem Nicolaas Alexander Frederik Karel Hendrik van Orange-Nassau; Willem Nicolaas Alexander Frederik Karel Hendrik of Orange-Nassau; Willem, Prince of Orange; Vilhelmo de Nederlando; 奥兰治亲王威廉; prins van Oranje-Nassau Willem</nowiki>
Willem Nicolaas Alexander Frederik Karel Hendrik van Oranje-Nassau (The Hague, 4 September 1840 – Paris, 11 June 1879), is the eldest son of Willem III of the Netherlands and Sophie von Württemberg. He never became king.
