Barnim III the Great, Duke of Pomerania

Barnim III (c. 1300–1368) was a Griffin duke of Pomerania-Stettin. He became his father Otto I's co-regent in 1320 and fought Brandenburg, beating its forces near Prenzlau in 1329. Emperor Louis IV recognized Pomerania-Stettin's imperial immediacy in 1338 and Charles IV confirmed it in 1348.

In 1348 Barnim conquered the eastern Uckermark backing the False Waldemar, and in 1351 he defeated the Mecklenburgers at Schoppendamm. He was also the first Griffin to style himself Duke of the Kashubians. He ruled alone from 1344 until 1368.