1238, Hugh de Plessetis born in England, s/o 19989516. Earl John de Plescy & 19989517. Christine de Saundford.
~1240, Isabel born in England, d/o 19989518. John Bisset & 19989519. Alice Basset.
1241, Isabel’s father died.
12/9/1241, The king has granted to John de Plessetis the custody of the lands and of Eleanor and Isabella, daughters and heiresses of John Biset, together with their marriage, the custody and marriage of one of whom the king granted to him of his gift and the custody and marriage of the other for the 100m. (S) FRsHIII.
1243, Hugh’s father became Earl of Warwick (for life) on his marriage to Margaret de Beaumont, heiress & sister of Thomas, Earl of Warwick.
By 1252, Hugh married to Isabel …, the niece and heiress of Philippa Basset, Countess of Warwick. (S) 3 Oxford Parishes, 1893. [Philippa a sister of Alice (19989519).]
12/16/1252, Hugh identifed at an inquisition as an heir [with his wife] of Joan de Saunford, who held lands at Dene and Messenden, Bucks. (S) Archaeologia Cantiana, 1859, P310.
1263, Hugh’s father died.
3/7/1264, IPM of John de Plessetis, earl of Warwick. Hugh, his son, aged variously stated as 24 and more, 25 or more, and 26, is his heir. [multiple counties] … Berks: Morton. 5½ virgates land held of the inheritance of Christina daughter of Hugh de Sanford, sometime his wife … (S) CIsPM.
9/1265, Hugh held 1 Kt. Fee at Wike, Northamptonshire.
By 1265, Isabel’s mother died; Isabel receiving a third of Headington. Alice [Isabel’s mother] with her 2 sisters [Margaret & Ela], coheirs of their maternal aunt Philippa, Countess of Warwick. [Hugh exchanged manors with the heir of Margaret to have 2/3rd of Headington. He bought the interest of Ela, thus becoming sole lord the manor.] (S) Headington, A Hist. of the Co. of Oxford, V5, Bullingdon Hundred, 1957. [These records also indicate that William of Wootton, son of Ela, in school at Oxford, was Hugh’s nephew.]
7/17/1272, IPM of John de Dyve. Northampton. Wyke. A capital messuage, 4 carucates land in demesne, meadow and pasture, 8 virgates land in villenage, 6 cottars, 60s. free rent, &c. held of Sir Hugh de Plecy, service unspecified. (S) CIsPM.
11/16/1272, Edward I ascended to the throne while on crusade.
7/4/1273, Hugh granted protection for his lands for travel to France to meet the King [of France].
1277, Hugh dePlescy, [in common with many landlords], attempting to enforce uncustomary services; the men of Headington collectively refered disputes with their lord to the arbitrament of the king's justices. (S) A Hist. of the Co. of Oxford, V5, 1957.
7/5/1277, Hugh given protection for his lands for being called into service in Wales with Roger de Mortimer. [Power to Roger de Mortuo Mari to receive into the king’s peace all the Welsh who may wish to come into the same, …, and to enter in a truce with all Welsh who in the hope of coming to the king’s peace may wish to enter into such truce. (S) CPRs.]
1277, King Edward was in Chester where he cleared a road through a dense forest, and started construction on the castles of Flint and Rhuddlan. King Edward made forays into the Welsh lands of Llywelyn ap Gruffydd, prince of Wales, capturing Snowdonia and the isle of Anglesey.
1278-9, Hundred outside the north gate of Oxford held of Lord Hugh de Plessey. (S) UKNA.
1279, John de Molendino held a mill at Marston of Hugh de Plescy for life at an annual rent of 11s. (S) A Hist. of the Co. of Oxford, V5, 1957, Marston.
1279, Hugh de Plescy, baron of D’Oilli, held a mesne tenure of the earl of Wawick. (S) Collections for a History of Staffordshire, V1, 1880, P184.
1280, Isabel died. (S) A Hist. of the Co. of Oxford, V5, 1957.
1280, Hugh surrendered the manor of Headington to the crown for £200 and the manor of Long Compton, Warwickshire. Hugh de Plessetis to Thomas his son: Grant, in exchange for his right in the manor of Headington which the said Hugh has granted to the King, of the remainder at his death of the manors of Kidlington, Hook Norton and Missenden, part of the barony of Oilly. (S) UKNA.
7/11/1281, King Edward I commits to Hugh for life Compton Manor, Berks., and Hugh grants Headington Manor to the King and Queen. (S) CCRs.
4/13/1282, Order to the treasurer and barons of the Exchequer to cause enrolment to be made pursuant to the king's grant to Hugh de Plessetis that of his debts he pay 100s. yearly for life, in lieu of a grant to him by Henry III that he pay 20 marks yearly. (S) CFRs.
1282, Hugh de Plescy claimed for the Hundred of North Gate that he had the assizes of bread and ale, hue and cry, and bloodshed, saving the pleas of the crown; judgement of thieves taken with the mainour and all waifs. He also had the profits from measures used in the hundred and had them signed with his own seal. (S) Hist. of Oxford, V5, 1957, Bullingdon Hundred.
2/1283, Theobald de Sancto Albino … 24 acres of land in Chalgrave, co. Oxford … vouched to warranty Hugh de Plessetis. (S) CCRs.
6/7/1285, Commission to … touching the persons who at dusk came to the manor of Hugh de Plecetis and Joan his wife, of Henton, broke the houses of the said manor … carried away a charter of the manor of Hedinton granted by the king to the said Joan, and certain other charters of Margaret their daughter whereby the said Hugh enfeoffed her in certain lands in Chalgrave and Wittenham, co. Oxford; … (S) CPRs.
2/19/1286, Order to the treasurer and barons of the Exchequer to cause to Hugh de Plessetis that of his ancient debts he render £10 a year. (S) CFRs.
1292, Hugh died; directing in his will that he should be buried in the conventual Church of Mussenden, next to the monument of his father. (S) Episcopal Registers, Diocese of Worcester, Bund, 1902, P-CI.
7/7/1292, Writ for IMP of Hugh de Plessetis. Buckingham: Messenden. A messuage, a carucate of land … Oxford: Hokenarton and Cudelinton. The manors … together with the barony of Oily which pertains to them … (S) CIsPM.
· There is contemporary  another Hugh de Plessetis, s/o Hugh, with a brother Thomas, who marries a Joan, d/o Hugh de Hoyuill. This contemporary Hugh makes arrangements for his daughter and heiress Margaret to have property in the vill of Chalgrave, Oxfordshire. (S) Feet of Fines, CP 25/1/188/10, number 48.
Children of Hugh and Isabel:
i. Christine de Plesey (4997379), born ~1260 in England.
ii. Hugh de Plessey, born 1267 in England.
Hugh married Margaret ?.
7/7/1292, Hugh, age 25, heir to his father.
2/24/1296, Hugh summoned to parliament at Salisbury.
7/7/1297, Hugh summoned to serve overseas.
3/8/1299, Hugh summoned to parliament.
9/26/1300, Earl Edmund “Crouchback” held of Sir Hugh de Plessy 1 Kt. Fee at Chalgrave, Oxon.
8/1301, Hugh died in Scotland, his son Hugh (d.1337) age 5 his heir. (S) CIsPM, 23 Aug. 29 Edw. I. Hugh’s son Hugh died 1349; his heir his brother John (d.1354) without issue. (S) Hist. of Oxford, V12, 1990, Kidlington.
iii. Thomas de Plessey, born ~1270 in England.