John became Sheriff of Bedfordshire in 1501, a position requiring not only physical vigor but mature judgment, so assuming he was age 30 at the time, his birth year would be 1471.
He was a knight Bachelor in 1497 before the Battle of Blackheath. If he were aged 25 at the time, his birth year would be 1472.
His children are shown [by Lewis, but not sourced] to be born beginning in 1480. This would suggest a marriage year of 1479, and if he were 21 at the time, a birth of 1458. An age of 25 at his marriage would place his birth year at 1453.
The birth year [currently was] shown on WikiTree [as] 1450. While there is no documentation for this year, it is not unreasonable if the children's dates are approximately correct. [Except they are not. Therefore, the 1450 birth year guess was changed to "about 1465" (closer to the 1471/2 estimates but not close enough to trigger database errors of "father too young", but making 1462 an unlikely birth year for his wife, Sibyl).]
The name Sibyl is of Anglo-Norman extraction, while Margred is Welsh. A reasonable surmise would be that her birth name was the Welsh Margred, but when she began to move in English circles, she adopted the name Sibyl.
Sir John married "Sibyl (or Margaret) ferch Morgan ap Jenkin ap Philip, daughter of Morgan ap Jenkin ap Philip, Esq., of Langstone, Monmouthshire, by his 2nd wife, Margred, daughter of Dafydd Matthew, Knt."
Sir John St. John of Bletneshoe, Knight, sonne & heire m. Sibell, daugher of [Rice ap] Morgan ap Jenkyn ap Philippe. Father of Sir John St. John of Bletneshoe, Knight, sonne & heire. m. Margaret, dau of Sir William Walgrave of Smallbridge (Buers St. Maryes) in com. Suffolk, Knight. Liaison with Anne, dau of Thomas Nevell, of Cotterstock in com. Northampton 2 sonne of William Nevell of Holte in Com. Lester.
Margred ferch Morgan had a sister Elizabeth, born to Morgan's first wife Elsbeth ferch Sir Richard Vaughan. Elizabeth married Thomas ap Lewys (his sister married John ap William Herbert).
↑ 1.001.011.021.031.041.051.061.071.081.091.10 Douglas Richardson. Royal Ancestry: A Study in Colonial and Medieval Families, 5 vols, ed. Kimball G. Everingham (Salt Lake City: the author, 2013), volume IV, pages 533-535 SAINT JOHN 16, 17.
↑ Esq., not K.B. (from an update to information published in Richardson's Royal Ancestry IV:533 SAINT JOHN 16, posted by Richardson in 2014: see details on John St John, Esq's profile).
↑ Richardson, Royal Ancestry, IV:523-536 SAINT JOHN.
↑ 4.04.1 Douglas Richardson. Magna Carta Ancestry: A Study in Colonial and Medieval Families, 4 vols, ed. Kimball G. Everingham, 2nd edition (Salt Lake City: the author, 2011), volume III, pages 478-479 SAINT JOHN 12.
↑ 6.06.16.2 Dates for the children previously listed in this profile were sourced to Richardson, but the only birth date that Richardson gives for any of his children is "before 1495" for his "son and heir", John (Royal Ancestry, I:384-387 BLETSOE 18 [John], III:56 GAMAGE 18 [Margaret], IV:534 SAINT JOHN 18 [Alexander], IV:533 SAINT JOHN 17 [others]).
↑Her father is described as "of Langstone, Monmouthshire", but Richardson does not mention where, or when, they married (Royal Ancestry, IV:533 SAINT JOHN 17).
↑ Richardson, Royal Ancestry, I:384-387 BLETSOE 18.
↑ Richardson, Royal Ancestry, IV:534 SAINT JOHN 18.
Richardson, Douglas. Royal Ancestry: A Study in Colonial and Medieval Families, 5 vols, ed. Kimball G. Everingham. Salt Lake City: the author, 2013. See also WikiTree's source page for Royal Ancestry.
Richardson, Douglas. Magna Carta Ancestry: A Study in Colonial and Medieval Families, 4 vols, ed. Kimball G. Everingham. 2nd edition. Salt Lake City: the author, 2011. See also WikiTree's source page for Magna Carta Ancestry.
Shaw, William Arthur & Burtchaell, George Dames, The Knights of England. A complete record from the earliest time to the present day of the knights of all the orders of chivalry in England, Scotland, and Ireland, and of knights bachelors, incorporating a complete list of knights bachelors dubbed in Ireland (1906)
Weis, Frederick Lewis. The Magna Charta Sureties, 1215, 4th ed., Baltimore, MD: Genealogical Publishing Co., Inc., 1991
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