Friedrich XI, Count of ZOLLERN
He married Adelheid Countess of FÜRSTENBERG-Haslach Bef 12 Jan 1377 . Adelheid Countess of FÜRSTENBERG-Haslach was born at of Haslach, Schwarzwaldkreis, Württemberg Abt 1356 daughter of Hugo Count of FÜRSTENBERG and Adelheid von Krenkingen .
They were the parents of 4
children:
Friedrich XII Count of Zollern
born Abt 1379.
Eitel Friedrich I, Count of Zollern
born Abt 1383.
Friedrich, Count of Zollern
born Abt 1386.
Anna, Countess of Zollern
born Abt 1390.
Friedrich XI, Count of Zollern died 26 Nov 1401 .
Adelheid Countess of FÜRSTENBERG-Haslach died 19 Mar 1413 .