Margaret de Botreaux
- Born: 1292-1297
- Marriage: Sir John de Dinham Knight about 1310 141,193
- Died: 28 Nov 1361 at age 69
Noted events in her life were:
• Background Information. 141
Sir John de Dinham married, in or before 1310, Margaret. He died on or just before 14 April 1332, aged 36. His widow's dower, and the knights' fees and advowsons of her dower, were ordered to be assigned, 16 July 1332. She died 28 November 1361.
~Cokayne's Complete Peerage, 2nd Edition, Vol. IV. pp. 372-373
• Background Information: From GEN-MEDIEVAL-L Archives. 193
Subject: CP Correction: Margaret, wife of Sir John de Dinham (d. 1332)
Date: Sat, 1 May 2004 12:29:30 EDT
The account for Sir John de Dinham (d. bef 15 April 1332) in CP provides no positive identification for his wife, stating in the text (and notes):
" He m., in or before 1310, Margaret (b).... She d. 28 Nov. 1361 (e). "
" (b) Joan, their firstborn da., was born a few weeks before 7 July 5 Edw. II [sic, but 1311 is meant]. (Ch. Inq. p.m., Edw. III, file 37, no. 3). It is usually stated that the wife of this John de Dynham was Joan or Margaret, da. of Sir Guy de Briene, but this is an error, arising from the fact that a Joan de Briene married Oliver de Dynham (Close Roll, 26 Edw. III, m. 29; Patent Roll, 42 Edw. III, p. 2, m. 30), which Oliver, who died 29 June 1351 (Ch. Inq. p.m., Edw. III, file 113, no. 10), was s. and h. of another Oliver, yr. br. of the said John de Dynham. " 
Dr. Hannes Kleineke had advised previously that she was in fact Margaret Botreaux, or de Botreaux, as evidenced by certain documents in the Cornwall Record Office. Dr. Kleineke advised this morning that this identification is documented in his thesis, 'The Dinham Family in the Later Middle Ages' (London Univ. Ph.D., 1998), p. 27, n. 99. One specific example which Dr. Kleineke gave evidencing this identification is Lady Margaret Dinham's seal attached to CRO AR 1/397 , which seal " a tree surmounted by two shields of arms, one of the Dinham arms, the other 'chequy, a bend', which obviously matches the Botreaux arms of 'chequy or and gules, a bend vair' admirably." 
As Dr. Kleineke also noted, the close association of Lady Margaret Dinham to Sir Reginald de Botreaux and his son Sir William is this particular document points further to a familiar relationship. Based upon Lady Margaret's likely range of birth dates between say 1292 [her husband born 14 Sept 1295] and no later than 1297 [her daughter Joan being b. in 1331 - CP IV:373(b)], I would place her as a daughter of William de Botreaux of Boscastle, d. ca. 1342 [son of William de Botreaux and Dionisia de Champernoun] and sister of
(A) Sir Reginald de Botreaux of Boscastle, who d. 1346 [the supporter in her plea of 'amesurement', in note  below], and
(B) Dionisia, wife of Sir William Basset of Terhidy (fl. 1300- 1340) .
 CP IV:373, sub _Dinham_, and note (b).
 PRO, Cornwall Record Office: Arundell of Lanherne and Trerice [AR/1/1 - AR/1/527] , AR/1/397:
: Lady Margaret 'de Dyneham' entered into Agreement for adjustment of dower with her son John, 29 Mar 1343 [Saturday after Annunciation, 23 Edw III ]:
' Agreement for adjustment of dower Lady Margaret who was wife of Sir John de Dyneham, knight (1) Sir John [de Dyneham], son and heir of Sir John (2) Recites: plea of 'amesurement' [assessment?] of dower betweeen (1) and (2) at Launceston in the church of St Stephen, by Sir Reginald de Botriaux, Sir William de Botriaux, Oliver de Carmynou, Sir John Petit, knights, Master Walter de Botriaux and others on the part of (1), and Sir Roger abbot of Hertilond, Sir John de Ralegh de Beaudeport and Oliver de Dyneham on the part of (2); appointment of 4 men to assess the lands of Sir John, and if they could not agree, then Thomas de Crouthorn to be the fifth; if (1) was found to have more than was reasonable, then she should return it to (2), and enjoy the rest peaceably.
' As they could not agree, Thomas appointed a day at Exeter, Saturday 11th Jan 1343 (Saturday after Epiphany 16 Edw III); (1) was found to have £11 2s 8 1/2d more than she ought, so that she made livery of the manor of Bodardel to (2) (its 35 tenants listed), making yearly 102s 8 1/2d; also half the turbary of the moor there, worth £6 yearly, and sale of the moor (la vente de la diste more) to be agreed yearly between them, together with 4s 4d from certain plots of pasture beside the moor in Halgras, Denetz [?] and Henbond and the way beside Halgras, to the share of (2), and the remainder of the pastures, worth 2s 2d, to remain to (1).
[Witnesses : ] Sir Reginald de Botreaux, Sir William de Botreaux, Sir John de Ralegh, knights, Walter de Sutton, John Fraunceys and Walter de Horton. ' Seal of (1) ('Sigill' Marga... ...nham').'
 Dr. Hannes Kleineke, <RE: Dinham - Brightleigh, Devon; and the Botreaux connection>, email dated 1 May 2004.
 Mark Harry, <Re: CP Addition: Ancestry of the Lords Botreaux>, SGM, 30 April 2004.
Margaret married Sir John de Dinham Knight, son of Sir Josce de Dinham Knight and Margaret de Hydon, about 1310 141.,193 (Sir John de Dinham Knight was born on 14 Sep 1295 in Nutwell Manor, Woodbury, Devonshire, England 141 and died on 14 Apr 1332 in England 141.)