The tom Brok (also: tom Broke, tom Brook, tom Broek, ten Brok, ten Broke) family were a powerful East Frisian line of chieftains, originally from the Norderland on the North Sea coast of Germany. From the second half of the 14th century, the tom Broks tried to gain control of East Frisia over the other chieftain families. The line of tom Brok died out in 1435.
- Coldewey, Dettmar, Heimatkundliche Daten. Wilhelmshaven 1960
- Houtrouw, Ostfriesland. Eine geschichtlich-ortskundige Wanderung gegen Ende der Fürstenzeit. Aurich 1889
- Wiarda, Ostfriesische Geschichte, 11 Bde., Aurich 1791–1819
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