08a. Henry de Grosmont

Henry de Grosmont (c.1310- 1361) was the only son of Henry, 3rd Earl of Lancaster (c. 1281β1345)
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 RoΓ«t, 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, nΓ©e de RoΓ«t. Born out of wedlock circa. 1375 he grew up to become a literate but minor cleric in the church.
12. Henry Beaufort 2

Henry Beaufort was the second child and second son of John of Gaunt, a Plantagenet and Duke of Lancaster, and his mistress Lady Katherine Swynford, nΓ©e de RoΓ«t. Born circa. 1375 he grew up to become a cleric in the Church.
13. Joan Beaufort

Joan Beaufort was the third child and only daughter of John of Gaunt, a Plantagenet and Duke of Lancaster, and his mistress Lady Katherine Swynford, nΓ©e de RoΓ«t.