Emicho I, Count of Nassau-Hadamar

On the other hand, a treaty closed in Wetzlar promised an end to the Greinfenstein's resistance to the Nassau expansion in the eastern part of the Westerwald.

In 1299, Emicho acquire considerable properties in the Nuremberg area, when King Albert I of Saxony mortgaged Kammerstein Castle, Schwabach, Altdorf, Kornburg Castle and the town of Kornburg to Emicho and his wife Anna, who was the daughter of Burgrave Frederick III of Nuremberg.

From 1317, Emicho acted as guardian of Count Gottfried V of Dietz (1303–1348), whose bad financial management had caused the decline of his county.

Emicho demanded extended guardianship rights over the County of Dietz, which was already owed him a considerable amount of money.

On 4 April 1334, only two months before his death, Emicho transferred the Court and Castle of Hadamar to Archbishop Baldwin of Trier, who gave it back to him as a fief.

[5] Emicho's younger brother John was captain in the army from Nassau and Mainz that fought in the decisive Battle of Wetzlar that ended the Dernbacher Feud on 10 August 1328.

His widow reached a compromise with her son John in 1336, in which she received the imperial Kammerstein Castle as her jointure, plus several manor in Franconia.