Background
Bogislaw was the eldest son of Duke Barnim I by his first wife, sometimes said to be a daughter of King Eric X of Sweden. He was an adult at his father's death in 1278, having been co-ruler since 1276.
Bogislaw was the eldest son of Duke Barnim I by his first wife, sometimes said to be a daughter of King Eric X of Sweden. He was an adult at his father's death in 1278, having been co-ruler since 1276.
His half-brothers Barnim II and Otto I were still very young and so he was sole ruler in Pomerania during their minority. In the early 1280s Bogislaw was involved in the war in the neighbouring margraviate of Brandenburg. Their son Wartislaw IV would later rule in Western Pomerania and inherit Rügen.
Their daughter Elisabeth of Pomerania (1291–1349) married Duke Eric I of Saxe-Lauenburg ca. 1318. Their daughter Euphemia of Pomerania married Christopher II of Denmark. Barnim II died soon afterwards and Otto ruled Szczecin.
In the 14th century, he was allied with would-be King of Poland Władysław the Short. He was unsuccessfully involved in the opening stages of the decade-long Brandenburg War.
