Albert V of SaxeLauenburg was the second son of Duke Albert IV of SaxeLauenburg and Beata of Schwerin , daughter of Gunzelin VI, Count of Schwerin. Albert succeeded his elder brother John III in 1356 as Duke of SaxeBergedorfMlln, a branch duchy of SaxeLauenburg. He died without an heir and was succeeded by his younger brother Eric III.
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Source: Wikipedia