John IV the Conqueror KG (in Breton Yann IV, in French Jean IV, and traditionally in English sources both John of Montfort and John V) (1339 – 1 November 1399), was Duke of Brittany and Count of Montfort from 1345 until his death and 7th Earl of Richmond from 1372 until his death. == Ordinal number == He was the son of John of Montfort and Joanna of Flanders.
John IV the Conqueror KG (in Breton Yann IV, in French Jean IV, and traditionally in English sources both John of Montfort and John V) (1339 – 1 November 1399), was Duke of Brittany and Count of Montfort from 1345 until his death and 7th Earl of Richmond from 1372 until his death. == Ordinal number == He was the son of John of Montfort and Joanna of Flanders.
Source: Wikipedia "John IV of Brittany" · CC BY-SA 4.0
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