He married Agnes Crophull[1] (1371/3 to 03 Feb. 1436) before November 1382.[17][18] She was the daughter of Thomas Crophull,[19] and granddaughter and heiress of John Crophull[20] and her cousin.
They had children:[d] Sir Walter Devereux his heir (1387).,[1][e][24] Sir Richard Devereux (c. 1389) ),[1][24][25][26] Sir John Devereux (c. 1391),[1][24][26][27][28] Thomas (c. 1393), Margaret (c. 1396), and Elizabeth (c. 1401).[29][30][f]
Agnes survived her husband and was the godmother Humphrey, earl of Stafford in August 1402.[31]She married a second time to John Parr of Kendall about 1403. John Parr died about September 1407, and his heir was a son Thomas (aged 2).[g] By their son, Thomas, John Parr and Agnes were ancestors of the sixth queen consort of King Henry VIII, Catherine Parr.