Tags: Noble.
Sibet Attena (also: Latin: Sibo; c. 1425 – 8 November 1473) was an East Frisian chieftain. He was a son of Sibet of Dornum (old Sibet) (d. 1433) 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 Omken the Elder he inherited Stedesdorf in 1447. As a nephew and a loyal supporter of Ulrich Cirksena he was invested with Esens in 1454.
