JOHN CLIFFORD, 7th Baron de Clifford, was born in 1389 and died March 13, 1422 in Siege of Meaux https://en.wikipedia.org/wiki/John_Clifford,_7th_Baron_Clifford#Marriage_and_issue
He Married ELIZABETH PERCY in 1426. She was born 1395 and died October 26, 1436
Children of JOHN CLIFFORD and ELIZABETH PERCY are:
I. THOMAS CLIFFORD 8th Baron de Clifford
b. March 26, 1413
d. May 22, 1455
m. JOAN DACRE
b. 1418
d. bef 1455
II. MARY CLIFFORD
b. 1416
d. October 4, 1478
m. PHILIP WENTWORTH
b. 1424
d. 1464
III. HENRY CLIFFORD
b. 1418
d. aft 1460
John Clifford, born about 1389, was the only son of Thomas Clifford, 6th Baron Clifford, and Elizabeth de Roos, daughter of Thomas de Roos, 4th Baron Roos of Helmsley, by Beatrix Stafford, daughter of Ralph de Stafford, 1st Earl of Stafford. He had a sister, Maud Clifford, who married firstly, John Neville, 6th Baron Latimer, and secondly, Richard, 3rd Earl of Cambridge.
At his father's death on 18 August 1391, Clifford, then aged about three, inherited the title and the position of hereditary High Sheriff of Westmorland. He was summoned to Parliament from 21 September 1411 to 26 February 1421.
He took part in a great tournament at Carlisle between six English and six Scottish knights, and in the war in France. He was at the Siege of Harfleur and at the Battle of Agincourt, where he was indented to serve Henry V with 3 archers. He accepted the surrender of Cherbourg.[citation needed] He was made a Knight of the Garter on 3 May 1421. He was a legatee in the will of his cousin, Henry V.
He was slain at the Siege of Meaux on 13 March 1422, and is said to have been buried at Bolton Priory. His widow, who died 26 October 1436, is buried at Staindrop, Durham.
https://en.wikipedia.org/wiki/John_Clifford,_7th_Baron_de_Clifford