Hermann I, Count of KASTL
He married Haziga, Countess of Diessen . Haziga, Countess of Diessen was born at of Diessen, Oberbayern, Bayern, Germany 1042 daughter of Friedrich II, Count of Diessen and Irmgarde, Countess of Gilching .
They were the parents of 3
children:
Mathilde, Countess of Kastl
born 1036.
Hermann II, Count of Kastl, Margrave of Banz
born 1041.
Friedrich, Count of Kastl
born 1041.
Hermann I, Count of Kastl died 27 Jan 1056 .
Haziga, Countess of Diessen died 17 Oct 1100 .