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Tacine Grey

Also Known As: "Tacy", "Thomasine Beaufort", "Tacine of Somerset", "Tacina", "Mary", "not Tacinda Tudor"
Birthplace: probably France
Death: after May 24, 1469
Immediate Family:

Daughter of John Beaufort, 1st Duke of Somerset; John Beaufort, Duke of Somerset and mistress of John Beaufort
Wife of Reynold Grey, 7th Baron Grey of Wilton
Mother of John Grey, 8th Baron Grey of Wilton and Sir John Grey
Sister of John of Somerset
Half sister of Margaret Beaufort

Managed by: Private User
Last Updated:

About Tacine Grey

Thomasine (Tacine) of Somerset

  • b. between 1421 and 1438, d. after 24 May 1469
  • Father: Sir John Beaufort, Duke & 3rd Earl Somerset, Earl Kendal b. b 25 Mar 1404, d. 27 May 1444
  • Mother: unknown

not to be confused with Tacinda Tudor.


  1. Sir John Grey, 8th Lord Grey of Wilton ( d. 3 April 1499) married Anne Grey, daughter of Sir Edmund Grey and Katherine Percy, married before 1466

Brief Biography

From "Margaret Beaufort's illegitimate sister"

"John Beaufort was held captive in France from 1421, when he was captured at the Battle of Bauge, until he was ransomed in 1438 and it was during this time that he fathered two illegitimate children by unknown French women. The son was called John and the daughter was called Tacine or Thomasine. .... Tacine was born in about 1434 in France, this date is the one most commly attributed to her, however it seems that she would then be only about twelve or thirteen when she married which seems very young. Due to the age of her husband, a date of 1425 seems more likely for a birth date.

Tacine received denization from the Privy Council to become a citizen of England on the 20th June 1443:

“Also the Kyng graunted at the same time and place that Tacyn doughter bastard to my said Lord of Somerset and her heires of her body lawfully begotten deniszeins …”

"This act indicates that she must have been living in England before this date and probably returned to England with her father in 1438. It appears that her father John accepted her as his daughter and welcomed her into his family. Tacine had made a good marriage by the end of 1446 to Reginald Grey, Lord of Wilton (b.1421). The couple had one son; John Grey. The funeral of William Grey, Lord Wilton on 22nd December 1562 lists his family as;

“the greate-graundfather and greate-graundmother to the defuncte...Reygnolde lorde Grey and Thomasyn or Thasyna base daughter to John duke of Somerset"

"In October 1447 Reginald and Tacine gave the manors of Yelling, Acresfleet, Snoreham and Weldbarnes and Shirland and a moity of Vaches Manor to Thomas Grey and his wife Margaret - Reginald's step-mother - for the remainder of their life. On 24th May 1469 Reginald and Tacine, with the agreement of their son John, sent a message called Stabullers along with various areas of land to William Danyell and Eleanor his wife and their heirs. This is the last written record containing Tacine.

"Reginald Grey died on the 22nd February 1493 and was buried at Bletchley.

supporting data


She was illegitimate, fathered during John's long captivity (17 years between 1421-1438) in France after the Battle of Beauge.6,2,4,10 She was born between 1421 and 1438; Foreign born.4 She married Sir Reynold Grey, 7th Lord Grey of Wilton, son of Sir Richard Grey, 6th Baron Grey of Wilton and Blanche de la Vache, before 29 September 1447; They had 1 son (Sir John, 8th Lord Grey of Wilton).3,4,5,10 Thomasine (Tacine) Beaufort died after 24 May 1469.2,4,10

Natural daughter of John Beaufort (161-18), Duke of Somerset

The Complete Peerage vol.XIIpI,p.48,note a. Alternate death 1494.


Reynold [Grey], 7th Baron Grey of Wilton born c. 1421 mar. bef. 6 Oct 1447 Tacyn/Thomasine, illegit. dau. of John [Beaufort], 1st Duke of Somerset, and half-sister of Lady Margaret Beaufort, mother of King Henry VII

only child 1. John Grey, later 8th Baron Grey of Wilton died 22 Feb 1493/4 (bur. in Bletchley Church, co. Buckingham) suc. by son

note fought on the Yorkist side at the Battle of Mortimer's Cross 1460/1


  • Birth: BEF 25 MAR 1404 1 2
  • Death: 27 MAY 1444 1 2
  • Reference Number: GAV
  • Occupation: Duke of Somerset 28 AUG 1443 2
  • Burial: Wimborne Minster, England 2
  • Occupation: Captain General Aquitaine and Normandy, France 2
  • Father: John DE BEAUFORT KG, 1st Earl of Somerset b: BETWEEN 1370 AND 1372
  • Mother: Margaret DE HOLAND

Marriage 1 Spouse Unknown [not married]


  • 1. Tacine BEAUFORT

Marriage 2 Margaret DE BEAUCHAMP b: ABT 1410 in Bletsoe, co. Bedford, England Married: 1439 2 1 3


  • 1. Margaret BEAUFORT b: APR 1441 in Bletsoe, co. Bedford

Note: Faris (1999) p. 360: [quote] JOHN BEAUFORT, K.G., second son, was born before 25 Mar. 1404. He was taken prisoner at the Battle of Bauge in Anjou on 22 Mar. 1420/1, and was not released till 1438. His base-born daughter Tacy was probably born during this period, and was made a denizen on 20 June 1443. He was married in or about 1442 to MARGARET BEAUCHAMP, widow of Oliver Saint John, Knt., and daughter and heiress of John Beauchamp, Knt., of Bletsoe, co. Bedford (of Magna Carta Surety descent and descendant of Charlemagne), by Edith, daughter of John Stourton, Knt. He was created Duke of Somerset on 28 Aug. 1443. He was Captain-General in Aquitaine and Normandy, and returned to England disgraced after the failure of French campaign, and died soon after testate on 27 May 1444 s.p.m., buried Wimborne Minster. His widow was married for the 3rd time, about April 1447, as second wife, to LIONEL WELLES, 6th Lord Welles (descendant of King Edward I), slain at Towton 29 Mar. 1461) [see WELLES She died at a great age shortly before 3 June 1482. D.N.B. 3:48 (1908) ("died by his own hand it is said being unable to brook the disgrace of banishment from court"). CF. 4:207 (1916). CF. 6:180 (1926). CF. 12(l):46-28 (1953).

Child of John Beaufort, by Margaret Beauchamp:

i. MARGARET BEAUFORT [see next].

Child of John Beaufort, by an unidentified mistress:

ii. TACINE BEAUFORT, married REYHOLD GREY [see WILTON 7]. [end quote]


1. Title: The Lives of the Kings & Queens of England (revised & updated). Abbrev: Fraser [1998] "Lives of the Ki[ngs]". Author: ed. Antonia Fraser. Publication: University of California Press, Berkely, 1998. Page: p. 137

2. Title: Plantagenet Ancestry of Seventeenth-Century Colonists: The Descent from the Later Plantagenet Kings of England, Henry III, Edward I, and Edward III, of Emigrants from England and Wales to the North American Colonies before 1701, English Ancestry Series, Volume 1, Second Edition. Abbrev: Faris, "Plantagenet Ancestry". Author: David Faris. Publication: New England Historic Genealogical Society, Boston, Boston, MA, 1999. Page: p. 360

3. Title: The Magna Charta Sureties, 1215 : The Barons Named in the MagnaCharta, 1215 and Some of Their Descendants Who Settled in AmericaDuring the Early Colonial Years, Fifth Edition. Abbrev: Weis [1999] Magna Charta Suret. Author: Frederick Lewis Weis, with additions and corrections by Walter Lee Sheppard Jr. & William R. Beall. Publication: Baltimore, Genealogical Publishing Co., 1999.

Note: Royal Families. Repository: Name: Unknown. Repository: Name: Unknown. Page: line 161-19, p. 191



  • Name: Tacine BEAUFORT
  • Death: AFT MAY 1469
  • Father: John BEAUFORT KG, Duke of Somerset b: BEF 25 MAR 1404

Marriage 1 Reynold DE GREY 7th Lord Grey of Wilton b: ABT 1421 Married: BEF 29 SEP 1447 2


  • 1. John GREY Knt., 8th Lord Grey of Wilton

Natural daughter of John Beaufort (161-18), Duke of Somerset

Reynold (or Reginald) Grey, 7th Baron Grey of Wilton, married Tacinda (Thomasine) Beaufort, one son, John, 8th Baron of Wilton.

From "Magna Carta Ancestry: A Study In Colonial And Medieval Families, 2Nd Edition, 2011". 2017. Google Books. Accessed April 15 2017. page 556

"" ... modern research has proven that Lady Tacine Grey was actually an illegitimate daughter of John Beaufort, Duke of Somerset, for whom see WILTON 9."


Notes about "Tacinda Tudor"

  • Not shown by Weir.
  • from RBH Biography: Owen Tudor (1400-1461) "They certainly had a daughter who died young, but suggestions that Thomasina, the wife of Reynold, Lord Grey of Wilton, was their daughter are incorrect." (Heavily Edited from Sidney Lee's 'Dictionary of National Biography' (1899))
  • from Catherine of Valois' Children 06/29/2013 "Tacinda Tudor was born sometime around the end of 1432 or the beginning of 1433. She married Reginald Grey, Baron Grey of Wilton. Unfortunately, that is about as much as we known of Tacinda. Her husband died in 1492." [incorrect]
  • from "The Large Version of the Chew Family Tree" The only evidence as to her parentage is in William's funeral ceremonial, which says (in part) that, of the gentlemen holding banners, "the iiij th Henrye Brereton, bearing the banneroll of the armes of the greate-graun dfather and greate-graundmother to the defunct in pale, Reygnolde lorde Grey, and Thomasyn or Thasyna base Unknown to John duke of Somersett." Vincent's Baronage, in the College of Arms, calls her Thaceta, Unknown of Owen Unknown of Tudor, but Vincent's source for this isn't known. See the second edition of Cokayne's *Complete Peerage*, vol. VI, pp. 180-187, paying special attention to the footnotes.


  1. The Complete Peerage vol.XIIpI,p.48,note a.


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Tacine Grey's Timeline

probably France
Age 23
Wilton, Herefordshire, England
May 24, 1469
Age 44