This is what we have so far.
Gender: Male
Birth: circa 1380 - Harpham, Yorkshire, England
Death: March 14, 1443 (58-67) York, Yorkshire, England
Son of Sir John St. Quintin of Harpham and Agnes (Warren) Saint Quintin and Agnes Warren (daughter of Robert Warren)
Husband of Elizabeth Gascoigne (daughter of Nicholas Gascoigne & Mary de Clitheroe)
Children
“St. Quintin of Hornby, Yorkshire” John Watson et al. June 3, 2011. < soc.Gen.medieval >
The 14 Mar 1443/44 will of Anthony St. Quintin of Harpham, pr. 3 Jul 1444, portions of it noted in my earlier Hornby post, is in Testamenta Eboracensia Part II; Surtees Soc Vol 30; page 95 @ http://books.google.com/books?id=9oIJAAAAIAAJ&pg=PA95 . It mentions sons Thomas (his heir but dsp 1445), William, Anthony and John, daus Joan and Margaret, and deceased wife Elizabeth. His wife's name is said in a footnote to be Elizabeth Frank of Grimsby, but given the next 2 Gascoigne marriage records this is doubtful unless she were a 2nd wife. There is also NO record of her beyond the visitations. Dodsworth visited Harpham Church 9 Oct 1622, noting several memorials there including Anthony's son Thomas (http://books.google.com/books?id=NmsKAQAAMAAJ&pg=PA1218 ) and several earlier St. Quintins. Despite a 1442 grant of an oratory to Anthony and Joan, Anthony's will makes it unlikely he had a second wife named Joan and suggests she was perhaps the wife of his son Anthony.[3]
Two records have been found that destroy the RD600, page 431 early pedigree, and prove that Anthony St. Quintin and Elizabeth Gascoigne could not be the grandparents of Sir Christopher Conyers b. bef 21 Apr 1402. Their marriage occurred shortly before 1 May 1410, Anthony 'son and heir' of Thomas St. Quintin and Agnes.[4]. Anthony's mother was likely Agnes Warren dau of Robert, 'lord of Newbiggin'.[5]
Clearly, Margaret is not this Anthony’s daughter, and I will detach her.
Attached document to Margaret:
The visitations of Yorkshire in the years 1563 and 1564, made by William Flower, esquire, Norroy king of arms (1881) Vol. 16 Pg. 74
https://www.geni.com/documents/view?doc_id=6000000022149273539
Separated Anthony St. Quintin of Harpham who married Elizabeth Frank
He was the son of Sir Thomas St. Quintin of Harpham & Agnes Anlaby
Separated Margaret St. Quintin, heiress of Swinhoe who married Sir John Conyers, Lord of Hornby as daughter of Anthony St. Quintin of Bradsburton
She was the daughter of John St. Quintin of Hornby and Elizabeth Swynho
The arguments for this pedigree are here:
John Watson, "Margaret Wife of Sir John Conyers of Hornby," 9 June 2017, Genealogical Rambling, found at < John Watson blogspot >.
And in much longer, draft form at John Watson, "John Conyers of Hornby and Margaret de St. Quinton," 17 Jan. 2013, found at Medieval Genealogy Group. < GoogleGroups >