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John IV, Duke of Mecklenburg (before 1370 – 16 October 1422) was sole ruler of the Duchy of Mecklenburg from 1384 to 1395 and co-regent from 1395 to 1422. Life. John IV was the only son of the Duke Magnus I of Mecklenburg and his wife Elisabeth of Pommern-Wolgast.
- John Iv, Duke of Brittany
John IV the Conqueror KG (in Breton Yann IV, in French Jean...
- Henry Iv, Duke of Mecklenburg
Henry IV, Duke of Mecklenburg (1417 – 9 March 1477) was from...
- John IV
John IV, Duke of Mecklenburg (died 1422) John IV, Count of...
- John Iv, Duke of Brittany
15 mar 2024 · Role In: Hundred Years’ War. War of the Breton Succession. John IV (or V) (born c. 1340—died Nov. 1, 1399, Nantes, Fr.) was the duke of Brittany from 1365, whose support for English interests during the Hundred Years’ War (1337–1453) nearly cost him the forfeit of his duchy to the French crown.
15 mar 2024 · Role In: War of the Breton Succession. John (IV) (died 1345) was a claimant to the duchy of Brittany upon the death of his childless half brother, John III. He was the only surviving son of Arthur II.
John VI, Duke of Mecklenburg (1439–1474) was a Duke of Mecklenburg. Life. John was the second son of Henry IV, Duke of Mecklenburg, and his wife Dorothea, daughter of Elector Frederick I of Brandenburg. His earliest documented official act (jointly with the father) was in 1451.
