| Hermann I Count of Kastl |
| Father: Hermann IV Duke of Swabia | Mother: Meginfred Marchese De Susa |
| Born: abt 1040 of Kastl, Oberpfalz, Bavaria |
Died: Jan 27,1056 |
| Spouse: Hagiza Countess of Driessen | Married: |
| Children:
Mathilde Countess of Kastl Hermann II Count of Kastl Freidrich Count of Kastl | Brothers & Sisters: |