Walram II of Nassau, German: Walram II. von Nassau, was Count of Nassau and is the ancestor of the Walramian branch of the House of Nassau.
Henry II "the Rich" of Nassau, German: Heinrich II. "der Reiche" von Nassau was Count of Nassau. He distinguished himself in particular by his chivalrous and devout spirit. He was charitable and made great donations to the church, so that the monasteries and prayer houses in the area of present-day Nassau experienced the most significant bloom in his time. The greatest favour was the Teutonic Order to enjoy, to which he donated especially for the renunciation of his brother's, upon his entry into the order. Henry participated in the Sixth Crusade. He was the builder of the castles Sonnenberg, Ginsburg and Dillenburg.
Otto I of Nassau, German: Otto I. von Nassau was Count of Nassau and is the ancestor of the Ottonian branch of the House of Nassau.
Dudo of Laurenburg, German: Dudo von Laurenburg, Latin: Tuto de Lurinburg, was probably Count of Laurenburg and is considered the founder of the House of Nassau. The House of Nassau would become one of the reigning families in Germany, from which are descended through females the present-day royals of the Netherlands and Luxembourg, while officially belonging to this House.
Rupert I of Laurenburg, German: Ruprecht I. von Laurenburg, was count of Laurenburg and one of the ancestors of the House of Nassau.
Arnold I of Laurenburg, German: Arnold I. von Laurenburg, was count of Laurenburg and an ancestor of the House of Nassau.
Rupert IV of Nassau, German: Ruprecht IV. von Nassau, was Count of Nassau. He later became a Knight of the Teutonic Order.
Walram I of Nassau, German: Walram I. von Nassau, also known as Walram I of Laurenburg, was Count of Nassau and is the oldest Nassau whose ancestorship is absolutely certain. He managed to expand his territory considerably during his reign. He took part in the Third Crusade.
Rupert III ‘the Bellicose’ of Nassau, German: Ruprecht III. ‘der Streitbare’ von Nassau, was one of the earliest counts of Nassau. He was not without significance for his country. Important government decisions characterize him, but much more important is his more general political activity, making him one of the most striking princes of the House of Nassau. He took part in the Third Crusade.
John of Nassau, German: Johann von Nassau, Dutch: Jan van Nassau was a clergyman from the House of Nassau. From 1267 to 1290 he was Bishop-Elect of the Bishopric of Utrecht as John I. He did not care much for his spiritual functions, and his government also failed due to his weak political and poor financial management. During his reign, the influence of the County of Holland in the Bishopric greatly increased. John's government was one of the worst the Bishopric had to endure; without talent and energy, slavishly surrendering to all sensual pleasures, it was never possible for him to maintain the inner peace, under which the Nedersticht in particular suffered greatly.
Count Adolf I of Nassau-Siegen, German: Adolf I. Graf von Nassau-Siegen, was since 1384 Count of Diez, through his first marriage. With his brothers, he succeeded his father in 1416 as Count of Nassau-Siegen, and also inherited the County of Vianden in 1417. He descended from the Ottonian Line of the House of Nassau.
Rupert II of Laurenburg, German: Ruprecht II. von Laurenburg was count of Laurenburg and one of the ancestors of the House of Nassau.
Henry I of Nassau, German: Heinrich I. von Nassau, was the first person who named himself count of Nassau.
Herman of Nassau, German: Hermann von Nassau, was count of Nassau. He later became a clergyman.
Beatrix of Limburg, was a German noblewoman who probably for a while acted as regent of the county of Laurenburg for her grandsons, who later became counts of Nassau.
Gerhard of Nassau, German: Gerhard von Nassau was a clergyman from the House of Nassau. He was probably the first Nassau in the Netherlands.
Matilda of Guelders and Zutphen, was a countess from the House of Wassenberg and by marriage countess of Nassau. She is a direct ancestor of both the Kings of the Netherlands and the Grand Dukes of Luxembourg.
Rupert was Vogt at Siegen and is one of the eldest known possible ancestors of the House of Nassau.
Elizabeth of Leiningen, German: Elisabeth von Leiningen, was a countess of the House of Leiningen and by marriage countess of Nassau. As widow she used the title countess of Schowenburg.
Countess Adelaide of Vianden was a countess from the House of Vianden, the cadet branch of the House of Sponheim that ruled the County of Vianden, and through marriage Countess of Nassau-Siegen. She acted as regent of the County of Nassau-Siegen for her eldest son in the period 1351–1362.
