John P Ravilious gave the following summary. [1]
1.5.1a.1 Thomas de la Hay[6]
Death: aft 1 Jul 1426, d.v.p.[9] of Spaldington, East Riding, co.Yorks.in re: the will of his father, the editor of Testamenta Eboracensia wrote,
'(Sir) Thomas De la Hay, the eldest son of the testator, married a daughter of Sir William Babthorpe of Babthorpe, by whom he left five daughters and coheirs, who carried the representation of his house into the families of Vavasour, Hildyard, Knight, and Thwaites. From the date of his own will, and the absence of his name in the present document, he probably had died just before the date of his father's will. By his will, dated July 1, 1426, in which he calls himself Thomas del Hay, son of Peter del Hay de Spaldyngton, he directs his body to be buried in the conventual church of Ellerton, near Elizabeth his mother. He mentions his brother Robert del Hay, and Joan his own wife, and his children.' [Test. Ebor. II:11, note[9]] evidently d.v.p. before 8 Aug 1426 [Test. Ebor. II:11-12[9]]GENEALOGICS I00198971[10]
concerning the family of Thomas de la Hay, Douglas Richardson provides the following extract: "Deed whereby Robert Hilyerd knight, son and heir of Katerine one of the daughters and heirs of Thomas de la Haye, esquire, Elezabeth Knyght, widow, the third of the daughters and heirs of Thomas, and Alice Thwaytes widow, fourth daughter and heir of Thomas, release and quit-claim to John Vavasour junior, serjeant-at-law, and his heirs, all their right in the manor of Spaldyngton and Willytofte, and 20 acres of land in Holme. Habendum to releases in fee, with warranty. Last day of August, 21 Edward IV. (1481)." [The Proceedings of the Society of Antiquaries 2nd ser. 4 (1869): 79]. [11]
Spouse: Joan Babthorpe [elsewhere called Elizabeth] [6] [9] [17]
Death: aft 6 Oct 1433[1]
Father: Sir William (or Ralph) Babthorpe
Mother: NN (possibly Maud Hildyard)
Children: Isabel (-<1481), Katherine (-<1481), Elizabeth, Alice (-1485), Dorothy6. George Poulson, Esq., "The History and Antiquities of the Seigniory of Holderness," Hull: Thomas Topping, and W. Pickering, 1840 (Vol I) 1841 (Vol II), pp. 197-198, pedigree of Hilton of Swine.
9. "Testamenta Eboracensia [A Selection of Wills from the Registry at York]," The Surtees Society, Durham: Andrews & Co., Part II (Vol. 30, Surtees Society publications), pp. 11-12 will of Peter de la Hay, proved 11 Apr 1431.
10. "Genealogics," website by Leo van de Pas, http://www.genealogics.com
11. Douglas Richardson, "Heirs of Thomas de la Haye, Esquire, of Spaldington, Yorkshire," 31 August 2005, GEN-MED...@rootsweb.com, cites Sir Henry Vavasour, The Proceedings of the Society of Antiquaries 2nd ser. 4 (1869): 79, and other sources.
[1] Genealogy Medieval, [URL].