John II of Saxe-Lauenburg

John II of Saxe-Lauenburg (c. 1275–1322) was the eldest son of Duke John I. After his father resigned in 1282, he and his brothers were guarded by their uncle Albert II and later ruled jointly with him. In 1296 Saxony was divided into Saxe-Wittenberg and Saxe-Lauenburg; John held the Mölln portion and gained Bergedorf from his brother Eric I in 1321, his branch becoming Saxe-Bergedorf-Mölln.

Though blind from his youth, he claimed the disputed Saxon electoral vote and joined the 1314 imperial election that raised Louis IV of Bavaria to the German kingship. He died on 22 April 1322.