Johann I Count of NASSAU-DILLENBURG
He married Margarethe Countess of the Mark 30 Nov 1357 at Werden, Rheinland, Prussia . Margarethe Countess of the Mark was born at of Mark Kr Hamm, Westfalen, Prussia Abt 1340 .
They were the parents of 5
children:
Adolf Count of Nassau-Dillenburg
born 1362.
Johann II Count of Nassau
born Abt 1364.
Engelbert I Count of Nassau-Dillenburg
born Abt 1370.
Heinrich Count of Nassau
born Abt 1376.
Johann III Count of Nassau
born Abt 1382.
Johann I Count of Nassau-Dillenburg died 4 Sep 1416 at Herborn, Hessen-Nassau, Prussia .
Margarethe Countess of the Mark died 29 Sep 1409 .