John III, Duke of Saxe-Lauenburg
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| John III Johann III. von Sachsen, Engern und Westfalen (de) | |
|---|---|
| officially: Duke of Saxony, Angria and Westphalia colloquially: Duke of Saxe-Lauenburg or Duke of Saxe-Bergedorf-Mölln | |
| Duchy of Saxe-Bergedorf-Mölln | |
| Reign | 1343 – 1356 |
| Predecessor | Albert IV of Saxe-Lauenburg |
| Successor | Albert V of Saxe-Lauenburg |
| House of | Ascania (by birth) |
| Father | Albert IV of Saxe-Lauenburg |
| Mother | Beata of Schwerin |
| Religion | Roman Catholic |
John III of Saxe-Lauenburg John III of Saxe-Lauenburg (*mid-1330s–1356*) was the eldest son of Duke Albert IV of Saxe-Lauenburg and Beata of Schwerin (*?–before 1341*), daughter of Gunzelin VI, Count of Schwerin. John III succeeded his father in 1343 as Duke of Saxe-Bergedorf-Mölln, a branch duchy of Saxe-Lauenburg. He died without an heir and was succeeded by his younger brother Albert V.
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