Hi Terry,
Please read my previous posts on this subject.
Flower's Visitation (250 years after the events) and Foster are wrong.
William and Anthony de St. Quintin never existed.
The facts in a nutshell are:
Sir Thomas de St. Quintin, possibly a younger son of Sir Geoffrey de
St. Quintin of Harpham was born about 1310. He married, before October
1330, Margaret, daughter and heir of Robert de Hornby of Hornby,
Yorkshire and his wife Christian. They had one son, John who married
before May 1378, Elizabeth de Swinhoe, daughter of William de Swinhoe
(died before March 1368) of Scremerston and Rock, Northumberland and
his wife Elizabeth. John de St. Quintin died about 1380, leaving a
daughter Margaret, heiress of her grandfather Sir Thomas de St.
Quintin who died before August 1391. Elizabeth, widow of John de St.
Quintin married secondly about 1381, Thomas son of Laurence
Mountforth, of Hackforth, Yorkshire, Nunney, Somerset and Riby
Lincolnshire. Thomas died before February 1392, leaving four children
by Elizabeth; Alexander, Thomas, John and Elizabeth. Elizabeth, widow
of Thomas Mountforth married thirdly, William Bishopdale, Mayor of
Newcastle-upon-Tyne, Northumberland who died s.p. in 1398, She married
fourthly, in or before 1399 Richard Clitheroe, later (1403-1405)
escheator of Northumberland. Elizabeth died before 1410 when Richard
Clitheroe was married to Margery Sulney, widow of Sir Nicholas
Longford of Derbyshire. Richard Clitheroe and Margery were divorced
about 1425 and Richard died s.p. before 11 June 1431.
Regards,
John