Henry of Lancaster, earl of Derby, earl of Lancaster, first duke of Lancaster (d. 1361)

Son of Henry, earl of Lancaster, and Maud Chaworth.

Poitou

France, region in the west bounded by Anjou and Touraine to the north, Berry and Limousin to the east, Angoumois to the south, Aunis, La Rochelle and the Atlantic to the west, and Saintonge to the south-west; ceded to the English crown in 1360 under the Treaty of Brétigny; reconquered by Du Guesclin and granted as an apanage to the duke of Berry in 1372.

Calais

Henry of Lancaster, earl of Derby, earl of Lancaster, first duke of Lancaster (d. 1361)

Son of Henry, earl of Lancaster, and Maud Chaworth.