07. Marital arms of Lady Katherine Swynford

These are the marital arms of Lady Katherine Swynford who married Sir Hugh Swynford circ. 1363. These arms appeared on her seal of circa 1377 which no longer survives.
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. Blanche of Lancaster

Marital arms of Blanche, Duchess of Lancaster, John of Gaunt’s first wife.
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 … ).
08c. Katherine of Lancaster

Marital arms of Katherine, Duchess of Lancaster
08d. The Duchess of Lancaster’s Personal Arms

Katherine (de Roët, Swynford ) of Lancaster was born circa. 1350 perhaps on 25 Nov, the feast day of St. Catherine of Alexandria. She died 10 May 1403, age 52-53
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
11. Henry Beaufort 1

Henry Beaufort was the second child and second son of John of Gaunt, a Plantagenet and Duke of Lancaster ( 3rd son of Edward III ), and his mistress Lady Katherine Swynford, née de Roët. Born out of wedlock circa. 1375 he grew up to become a literate but minor cleric in the church.