Background
At the time of her birth, Henry was only Earl of Derby and, thanks to his marriage, Earl of Northampton and Earl of Hereford. As the only surviving son of John of Gaunt and Blanche of Lancaster, he was the heir of the Duchy of Lancaster.
At the time of her birth, Henry was only Earl of Derby and, thanks to his marriage, Earl of Northampton and Earl of Hereford. As the only surviving son of John of Gaunt and Blanche of Lancaster, he was the heir of the Duchy of Lancaster.
Three years later, in 1402, her father was remarried, to Joanna, daughter of King Charles II of Navarre and widow of Duke John V of Brittany. They had no children.