Overview
Uko Fockena (also known as: "Uko of Oldersum"; , Oldersum (uncertain) – 13 June 1432 near Suurhusen) was an East Frisian chieftain of Moormerland and Emsigerland.
Life
Uko was one of the sons of the East Frisian chieftain Focko Ukena (born: around 1370; died: 29 August 1436) and his wife Theda of Rheide (born ; died: before 1411).
In 1424 Uko acquired together with Udo Poppinga the farm tor Brake (also spelled to Brahe / Brae) in the Emsland region from the Squire Ecerd von der Bele. His brother-in-law Ocko II tom Brok (Ocko to Broke), chief of the Brokmerland asked the abbot of Werden, in a letter dated 17 September 1424, to enfeoff Uko with this farm and confirmed that Uko was by birth a free man, honest and genuine, with four free-born grandparents.
Between 1425 and 1427 Uko married Hebe (or Heba) of Dornum, a daughter of Lütet Attena of Dornum and Nesse and Ocka tom Brok, a daughter of Ocko I tom Brok. Documentary evidence exists that the heiress of this marriage was Theda Ukena (born: before 1432; died 17 September 1494), who married in 1455 Ulrich I Cirksena who was stadtholder of East Frisia and became the first Count of East Frisia in 1464.
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