Biography of William Mowbray 6th Baron Thirsk 1173-1224

Paternal Family Tree: Daubigny

Around 1173 William Mowbray 6th Baron Thirsk was born to [his father] Nigel Mowbray 5th Baron Thirsk (age 27) and [his mother] Mabel Clare Baroness Thirsk (age 17).

Around 1175 [his father] Nigel Mowbray 5th Baron Thirsk (age 29) and [his mother] Mabel Clare Baroness Thirsk (age 19) were married. She by marriage Baroness Thirsk. She the daughter of [his grandfather] Roger Clare 2nd Earl Hertford and [his grandmother] Maud St Hilary Countess Hertford. They were half fourth cousin once removed.

In 1188 [his grandfather] Roger de Albini (age 68) died in Palestine. His son [his father] Nigel (age 42) succeeded 5th Baron Thirsk.

Around 1191 [his father] Nigel Mowbray 5th Baron Thirsk (age 45) was killed in Acre [Map]. His son William (age 18) succeeded 6th Baron Thirsk.

In 1204 [his mother] Mabel Clare Baroness Thirsk (age 48) died at Axeholme.

In 1208 [his son] William Mowbray was born to William Mowbray 6th Baron Thirsk (age 35) and [his future wife] Avice D'Aubigny Baroness Okehampton Baroness Mowbray (age 12). He a great x 4 grandson of King Henry I "Beauclerc" England.

Before 1209 William Mowbray 6th Baron Thirsk (age 35) and Avice D'Aubigny Baroness Okehampton Baroness Mowbray (age 12) were married. She by marriage Baroness Thirsk. The difference in their ages was 23 years. She the daughter of William D'Aubigny 3rd Earl Lincoln 3rd Earl of Arundel (age 29) and Mabel Gernon Countess Lincoln and Arundel. They were third cousins. She a great x 3 granddaughter of King Henry I "Beauclerc" England.

Chronicle of Abbot Ralph of Coggeshall

The Chronicle of Abbot Ralph of Coggeshall (Chronicon Anglicanum) is an indispensable medieval history that brings to life centuries of English and European affairs through the eyes of a learned Cistercian monk. Ralph of Coggeshall, abbot of the Abbey of Coggeshall in Essex in the early 13th century, continued and expanded his community’s chronicle, documenting events from the Norman Conquest of 1066 into the tumultuous reign of King Henry III. Blending eyewitness testimony, careful compilation, and the monastic commitment to record-keeping, this chronicle offers a rare narrative of political intrigue, royal power struggles, and social upheaval in England and beyond. Ralph’s work captures the reigns of pivotal figures such as Richard I and King John, providing invaluable insights into their characters, decisions, and the forces that shaped medieval rule. More than a simple annal, Chronicon Anglicanum conveys the texture of medieval life and governance, making it a rich source for scholars and readers fascinated by English history, monastic authorship, and the shaping of the medieval world.

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Before 2nd October 1209 [his son] Roger Mowbray was born to William Mowbray 6th Baron Thirsk (age 36) and [his wife] Avice D'Aubigny Baroness Okehampton Baroness Mowbray (age 13). He a great x 4 grandson of King Henry I "Beauclerc" England. He married before 1254 his half fourth cousin once removed Maud Beauchamp and had issue.

In 1214 [his wife] Avice D'Aubigny Baroness Okehampton Baroness Mowbray (age 18) died.

Magna Carta

                    On 15th June 1215 King John of England (age 48) met with his Baron's at Runnymede [Map] where he agreed to the terms of the Magna Carta which attempted to reduce the King's authority through political reform. Those who signed as surety included:
                
                    Roger Bigod 2nd Earl Norfolk (age 71)
                
                    his son Hugh Bigod 3rd Earl Norfolk (age 33)
                
                    Henry Bohun 1st Earl Hereford (age 39)
                
                    [his uncle] Richard Clare 3rd Earl Hertford (age 62)
                
                    his son Gilbert Clare 5th Earl Gloucester 4th Earl Hertford (age 35)
                
                    William "The Younger" Marshal 2nd Earl Pembroke (age 25)
                
                    William Mowbray 6th Baron Thirsk (age 42)
                
                    Saer Quincy 1st Earl Winchester (age 45)
                
                    Robert Ros (age 43), Richard Percy 5th Baron Percy Topcliffe (age 45)
                
                    Robert de Vere 3rd Earl of Oxford (age 50)
                
                    Eustace Vesci (age 46)
                
                    John Fitzrobert 3rd Baron Warkworth (age 25)
                
                    John Lacy Earl Lincoln (age 23).
                
                    William de Albini (age 64), Geoffrey Mandeville 2nd Earl Essex (age 24)
                
                    Robert Clare Fitzwalter                

                    William Forz 3rd Earl Albemarle                

                    William Hardell
                
                    William Huntingfield
                
                    William Llanvallei
                
                    William Malet 1st Baron Curry Mallet
                
                    Roger Montbegon, Richard Montfichet
                
                    Geoffrey Saye (age 60) signed as surety the Magna Carta.
                
                    Ranulf de Blondeville Gernon 6th Earl Chester 1st Earl Lincoln (age 45) witnessed.

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Second Battle of Lincoln

                    On 20th May 1217 William Marshal 1st Earl Pembroke (age 71) and Ranulf de Blondeville Gernon 6th Earl Chester 1st Earl Lincoln (age 47) fought at Lincoln, Lincolnshire [Map] during the Second Battle of Lincoln.
                
                    Rebels William Mowbray 6th Baron Thirsk (age 44) and William Ros (age 17) were captured. William de Albini (age 66) fought for the rebels. Thomas Chateaudun I Count Perche (age 22) died fighting for the rebels.
                
                    Bishop Peter de Roches led a division of the royal army and earned some distinction by his valour.