Adolph I, Count of Nassau-Wiesbaden-Idstein

Adolph I, Count of Nassau-Wiesbaden-Idstein (1307 – 17 January 1370) was a son of Count Gerlach I and Agnes of Hesse. In 1344, his father abdicated in favor of his sons. They ruled jointly until 1355, then divided their inheritance:
 * Adolph I inherited Nassau-Wiesbaden-Idstein (this line died out in the male line in 1605)
 * John I inherited Nassau-Weilburg (this line died out in the male line in 1912)
 * Rupert inherited Nassau-Sonnenberg (he died childless in 1390)

Marriage and issue
In 1322 Adolph married Margaret, the daughter of Frederick IV, Burgrave of Nuremberg. They had the following children:
 * Gerlach II (1333–1386), inherited Nassau-Wiesbaden
 * Frederick (d. 1376) was minister in Mainz
 * Agnes (d. 1376), married Werner IV, Count of Wittgenstein
 * John
 * Margaret was abbess of Klarenthal Monastery
 * Elisabeth (d. 1389), married in 1361 to Diether VIII, Count of Katzenelnbogen
 * Adolph I of Nassau (1353–1390), Archbishop of Mainz from 1379
 * John II (1353–1420), Archbishop of Mainz from 1397
 * Anna was abbess of Klarenthal Monastery
 * Walram IV (1354–1393), inherited Nassau-Idstein
 * Catherine (d. 1403), married in 1373 to Reinhard IV, Count of Westerburg
 * Frederick
 * Walram II
 * Joanna