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.
[3] In 1424 Uko and his father opposed the tom Brok family of East Frisian chieftains, who had transferred the village and castle of Oldersum to them in 1413.
Ocko II tom Brok demanded from Focko the return of the castle and won a court case to that effect in the city of Groningen dated 6 June 1426.
[citation needed] From the spoils of war Uko Fockena kept the Lordship of Oldersum, including the parishes of Gandersum, Rorichum, Tergast and Simonswolde.
[6] In 1430, Uko was besieged in his Oldersum castle by a group of Frisian chieftains who had joined forces under the leadership of the Cirksena family and who opposed Ukena's Lordship.