~1170, William born in England, heir & s/o 94562560. Nigel de Mowbray & 94562561. Mabel de Clare.
~1182, Agnes born in England, d/o 94562562. William D’Aubeney & 94562563. Maud de Saint Hilary.
9/18/1180, Philip Augustus succeeded as King of France.
1191, William succeeded his father.
11/20/1193, at Spiers, Germany, William witnessed a charter of King Richard I while in his 2nd year of captivity.
1/17/1194, William went to Vienna as 1 of 67 hostage for the release of King Richard I.
3/1194, King Richard was back in England.
12/31/1194, King Richard’s captor, Lepold V, died, renouncing the last 4000 marks of ransom and promising to release his hostages.
1195, On payment of £100 William had livery of his lands. (S) Historical Essay on the Magna Carta, Thomson, 1829, P293.
9/1197, Confederation between Richard of England and Baldwin, count of Flanders and Hainaut, against Philip, king of England. … William de Mowbray … The above witnesses were sworn in Normandy, before the king of England and the Count of Flanders … (S) Life of Philippe Auguste, Rigord, 1826.
4/1199 at Northampton, William Marshall, having returned to England, assembled barons to address their grievances, including William de Mowbray. [Those assembled held over 850 knights’ fees.] William swore fealty to King John after an agreement on the rights of each.
5/27/1199, John crowned king of England.
4/1200, King John issued a charter to William de Stutville [who gave 3000 marks] promising justice for his ancestral claim to William de Mowbray’s barony. William offered 2000 marks for justice.
1/21/1201, William lost in his suit and had to give Stutville the manor of Brinklow and 9 knights’ fees to renounce his claim. [William de Stutville died in 1203.]
1201, William attended King John on his expedition in France. (S) Medieval Prosopography, Vs18-19, 1997, P12.
4/12/1201, King John at Gournay, France.
1201, King John seized the country of La Marche on behalf of his new Queen Isabella; attacking Lusignan castles in Aquitane.
7/1201, Arthur of Brittany led a force into the Norman territory of King John, and was captured. [Arthur was the son of King John’s older deceased brother Geoffrey, who was the most direct heir of King Henry III.]
10/8/1201, King John back in England for the coronation of Queen Isabella.
[––William & Agnes––]
By 1202, William married Agnes.
1203, King Philip attacked King John’s lands in Normandy and Angiers, capturing Chateau-Gaillard and the city of Rouen.
4/3/1203 at Rouen, King John killed his prisoner Arthur of Brittany, age 16, rightful heir to the throne of England. [Note that no other rulers of England would be called “John”.]
1203, King Philip of France attacked King John’s lands in Normandy and Angiers, capturing Chateau-Gaillard and the city of Rouen. [Many of King John’s barons were losing their Norman holdings.]
2/24/1204, Adam de Staveleia and William de Mowbray. … Final concord concerning the forest of Burton in Lonesdale and the forest of Mewid; Adam has released his right in the forests to William. (S) UKNA.
1204, King Philip of France conquered Poitiers and the region between it and the border of Touranine.
1205, After the loss of Normandy, which included lands of William at Montbrai, William continued to support King John.
1206, William refused to attend the crossing of King John, who landed at La Rochelle.
1206, John de Daiville gave 40s. for a writ that William de Mowbray should restore Langford to him, a knight's fee. (S) Early Yorkshire Charters, V9, 1952, P98.
10/26/1206, King John and King Philip agreed to a truce. The French held Anjou, Brittany, Maine and Normandy, leaving Aquitain in southern France to John. Most of the English baronial lands on the continent had been lost.
1207, William still owed 1940 marks from his 2000 marks fine of 4/1200.
1209, Because William stilled owed £1200, King John ordered the exchequer to collect William’s debts from his vassals; the largest sum coming from Nicholas de Stutville [brother of William of the suit.]
1210, William de Mowbray a witness to the official account written by King John of his quarrel with William de Briouse.
1212, William still owed £773, owing £400 for his Jewish debts taken into the King’s hands. (S) Struggle for Mastery, Carpenter, 2003, P273.
5/1213, King John signed a concession to the Pope in which he swore allegiance to the Vatican, making England a fief of the Pope, and agreeing to pay tribute.
1213, William joined other barons in opposing overseas service and payment of scutage for not attending.
2/9/1214, King John and 12 of his barons sailed for Poitou. William was one of multiple Northern barons that refused to attend the king on the crossing.
1215, King John ordered the constable of the castle of York to deliver it to William.
5/5/1215, Revolting Barons formally renounced their allegiance to King John and invited the King of France to invade England. [The barons in revolt together held more castles and knights fees than John did as King. Intervention by the King of France prevented by the Pope.]
1215, William joined the confederacy of barons against King John.
1215, Convention between the King and William de Mowbray and certain other Barons of England.
6/19/1215 at Runnymede near Windsor, King John forced to agree to the terms of the Magna Carta. William, 1 of 25 Barons, selected by the rest, to enforce the Magna Carta.
7/7/1215, Robert fitz Walter, the earl of Winchester, the earl of Clare, the earl of Gloucester, Eustace de Vescy, Richard de Percy, John, constable of Chester, William de Albini and William de Mowbray excommunicated by a letter of the Pope written at Ferentino, Italy. (S) UKNA.
11/20/1215 at Bury St. Edmunds, William elected as one of the 25 to guarantee observance of the Magna Carta. (S) History, Gazeteer and Dir. of Suffolk, 1874, P565.
5/20/1216, Prince Louis of France crossed to England in 10 warships, with 1200 knight and 900 troops. Louis quickly captured all the Cinque Ports except Dover, and the town of Lincoln, but not the castle.
7/1216, William de Mowbray 1 of 13 baronial leaders selected to hold London until August 15th as the King’s custodians.
10/18/1216, King John died.
10/28/1216, Henry III, age 9, crowned king of England.
5/20/1217, William, supporting Prince Louis, taken prisoner at the battle of Lincoln [released for ransom.]
9/12/1217, For 10,000 marks and some land exchanges, Prince Louis forfeited his claim to the English crown.
1220, Wm. de Mowbray confirmed to the monks of Fountains what they had in Carlesmore. (S) Yorkshire Archaeological Journal, V8, 1884, P281.
1220, William heir to his younger brother Roger. (S) Transactions Leicestershire, V1, 1866, P243.
1221, William with King Henry III at the siege of Bytham castle, Lincolnshire.
1223, Messenger sent to the bishop of Winchester, William de Mowbray, and others.
Bef. 3/25/1224, Willielmus de Mowbray, of Thirsk, Yorkshire died at Epworth; seisin given to Nigel de Mowbray.
11/11/1232, Agnes a nun at Buckland [Oxfordshire].
(S) Magna Carta Ancestry, P598. (S) Journal of the House of Lords, V108, P195. (S) Reign of King John, Painter, 1949.
Children of Roger and Agnes:
i. Nigel de Mowbray, born by 1203 in England.
Bef. 3/25/1224, Seisin of his father’s lands given to Nigel de Mowbray for 500£. (S) Transaction of the Leicester Arch., V1, 1866, P264.
Nigel married Maud, heiress & d/o Roger de Camvil. [No children.]
1230, Nigel died at Nantz, Brittany; his brother Roger his heir.
ii. Roger de Mowbray (23640640), born 1219 in Yorkshire, England.