Henry IV the Faithful

Henry IV the Faithful (c. 1292–1342), eldest son of Henry III of Głogów, ruled Żagań from 1309, first with his brothers. In 1310 he married Matilda of Brandenburg, but the alliance did not save the family's Greater Poland lands, which Władysław I had largely seized by 1314.

The 1321 partition made him sole duke of Żagań, and in 1329 he had to do homage to John of Luxembourg. He died in 1342 and was succeeded by his son Henry V of Iron.