Gerlach I of Nassau-Wiesbaden

Gerlach I of Nassau (between 1275 and 1283 – 7 January 1361), Count of Nassau in Wiesbaden, Idstein, Weilburg, and Weilnau.

He was a son of Emperor Adolf of Nassau-Weilburg and Imagina of Isenburg-Limburg. In 1344 he abdicated.

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, and hence a granddaughter of Landgrave Henry I "the Child" of Hesse and had the following children:

Second, he married before 4 January 1337 Irmgard of Hohenlohe-Weikersheim, daughter of Kraft II of Hohenlohe-Weikersheim and had the following children:

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