08. John of Gaunt

John of Gaunt (1340-1399 ) was the third son to Edward III of England, 1312-1377,
a Plantagenet, and his spouse Philippa of Hainault (1311-1369

08a. Henry de Grosmont

Henry de Grosmont (c.1310- 1361) was the only son of Henry, 3rd Earl of Lancaster (c. 1281–1345)

08b. Castile & Lancaster

Costanza of Castile was recognized as the de jure Queen of Castile so the arms are shown as Castile impaled by Lancaster ( the kingdom by the dukedom … ).

09. John Beaufort 1

John Beaufort, 1373-1410 was the eldest son, born out of wedlock, to John of Gaunt, Duke of Lancaster by Lady Katherine Swynford his mistress

09a. John Beaufort 2

John Beaufort, 1371-1410 was the eldest son born out of wedlock, of John of Gaunt, Duke of Lancaster