To raise funds for this he was betrothed to Philippa, daughter of the count of Hainaut.
By Mary Bohun Henry had four sons: his successor Henry V., Thomas, duke of Clarence, John, duke of Bedford, and Humphrey, duke of Gloucester; and two daughters, Blanche, who married Louis III., elector palatine of the Rhine, and Philippa, who married Eric XIII., king of Sweden.
In 1373 to his grand-daughter Philippa, wife of Edmund Mortimer, and confirmed to Richard, duke of York, by Henry VI.
While residing here he captivated and seduced the beautiful daughter of the prince, Philippa, sister of the empress Maria.
Queenborough Castle was built about 1361 by Edward III., who named the town after Queen Philippa and made it a free borough, with a governing body of a mayor and two bailiffs.