Children: at least son John, possibly the daughter Euphemia was already born.
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After the Portuguese Restoration War, during the reign of King John IV, the Counsel of War determined that the demolition of the monastery ruins, and the use of their rocks to build a coastal defense would help protect the coastal settlements; the Fort of São João Baptista das Berlengas was constructed from the remnants of the monastery ruins.
Under this flag, peasants and city dwellers had defeated the troops of the French count of Armagnac along the upper Rhine in 1439, 1443 and 1444.
Charles was born in Strelitz, the only son of the reigning Duke of Mecklenburg-Strelitz, Adolphus Frederick II, and his third wife, Princess Christiane Emilie of Schwarzburg-Sondershausen.
In the same year Eric IV, supported by his sons Eric (later reigning as Eric V) and John (later John IV), captured the pawned lands without making the agreed repayment and before Lübeck could take possession of them.
Brandes had claims due against John IV, Duke of Saxe-Lauenburg from a credit which Brandes had granted earlier.
John IV, Duke of Brittany (1294-1345), contested Duke of Brittany, one of two sides in the Breton War of Succession
He sold all he possessed to the English, and his fief of Fougères to the Duke of Brittany.
John the Fearless, the duke of Burgundy, naturally supported his nephew, as did the States of Brabant.
Joan of Brittany, Baroness of Drayton (1341 – aft. 20 October 1399), married before 21 October 1385 Ralph Basset, 4th Baron Basset de Drayton
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Frans van Mieris the Younger, Groot Charterboek der Graven van Holland, Leiden, 1753
The Pactum Sicardi was a treaty signed on 4 July 836 between the Greek Duchy of Naples, including its satellite city-states of Sorrento and Amalfi, represented by Bishop John IV and Duke Andrew II, and the Lombard Prince of Benevento, Sicard.
Abbot Gerard van Goetsenhoven (1414–34) had much to do with the establishment of the Catholic University of Leuven, and was also delegated by John IV, Duke of Brabant to transact state affairs with the King of England and the Duke of Burgundy.
She was the daughter of Albert of Mecklenburg, King of Sweden and Duke of Mecklenburg, and Richardis of Schwerin.