Wiki information Sibet:

Sibet Attena
Noble person, Person, Deceased Person

Sibet Attena was an East Frisian chieftain. He was a son of Sibet of Dornum and Frouwa of Manslagt, a daughter of Enno Cirksena. From his father he inherited the Beninga Castle in Dornum. From his first wife, Onna of Stedesdorf, a daughter of Hero...

Achim Sibeth
Author, Person