Ocko I tom Brok
|Coat of arms|
|Chieftain of Brokmerland||1376–1389|
|Predecessor||Keno I tom Brok|
|Successor||Widzeld tom Brok|
|Noble family||Tom Brok|
|Father||Keno I tom Brok|
According to tradition, he lived in the 1370s in Italy and was knighted by Queen Joanna I of Naples for his military and court services. After the death of his father in 1376 Ocko returned to his homeland in 1378. After heavy fighting against Folkmar Allena, he initially united almost all of East Frisia under his rule. In 1389 he was murdered near the district of Aurich Castle.
- Keno II tom Brok (married Adda Idzinga of Norden),
- Tetta tom Brok (married Sibrand of Loquard),
- Ocka tom Brok (married Lütet Attena of Dornum and Nesse).
His eldest, but illegitimate son was Widzeld tom Brok, (d. 25 April 1399), who succeeded his father as chieftain after he had been murdered.