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| Albert IV | |
|---|---|
| Duke of Saxe-Bergedorf-Mölln | |
| Reign | 1321–1343 |
| Predecessor | John II of Saxe-Lauenburg |
| Successor | John III of Saxe-Lauenburg |
| Born | 1315 |
| Died | 1343 |
| Saxon consorts | (1) Beata of Schwerin (2) Sophia of Werle-Güstrow |
| Issue Detail | John III Albert V Eric III |
| House of | Ascania (by birth) |
| Father | John II of Saxe-Lauenburg |
| Mother | Elisabeth of Schauenburg and Holstein-Rendsburg |
Albert IV of Saxe-Lauenburg (1315 – 1343) was the eldest son of John II of Saxe-Lauenburg and Elisabeth of Holstein-Rendsburg (*ca. 1300–before 1340*), sister of Gerard III the Great. In 1321 Albert IV succeeded his father as Duke of Saxe-Bergedorf-Mölln, a branch duchy of Saxe-Lauenburg, while his mother served as regent, before she remarried Eric Christoffersen (*1307–1331*), a son of King Christopher II and co-ruler in Denmark.