Gerlach I of Nassau (1288 â 7 January 1361), Count of Nassau in Wiesbaden, Idstein, Weilburg, and Weilnau.
He was a son of Adolf of Nassau, elected King of the Romans, and Imagina of Isenburg-Limburg.
He was married two times. First, 1307 with Agnes, a daughter of Agnes of Bavaria, Margravine of Brandenburg-Stendal and her first husband Henry the Younger of Hesse, and hence a granddaughter of Landgrave Henry I "the Child" of Hesse and had the following children:
Second, he married before 4 January 1337 , daughter of Kraft II of Hohenlohe-Weikersheim and had the following children:
2. Pierre Even: Dynastie Luxemburg-Nassau. Von den Grafen zu Nassau zu den GroÃÂherzögen von Luxemburg. Eine neunhundertjährige Herrschergeschichte in einhundert Biographien . Luxemburg 2000, S. 20âÂÂ22.<br>3. Festschrift der Konrad-Duden-Schule in Wiesbaden-Sonnenberg 1904âÂÂ1984.<br>4. Festschrift 875 Jahre Sonnenberg. 1126-2001. Wiesbaden 2001.<br>5. Gerhard Köbler: Historisches Lexikon der deutschen Länder. Die deutschen Territorien vom Mittelalter bis zur Gegenwart. 7., vollständig überarbeitete Auflage. C.H. Beck, München 2007, ISBN 978-3-406-54986-1.