"Henry IV, Duke of Mecklenburg (1417 – 9 March 1477) was from 1422 to 1477 Duke of Mecklenburg." - (en.wikipedia.org 22.03.2020)
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| father of | Magnus II, Duke of Mecklenburg [son of], Dorothea of Brandenburg, Duchess of Mecklenburg [mother of] ↓ |
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| son of | John IV, Duke of Mecklenburg ↓ |
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