Individual Details

Sir William de Marmion Knight, son of Robert 'The Younger' Marmion, VI of Winteringham, Magna Carta Surety and Avice/Alice de Tanfield, was born in 1212 and died aged 64 years, by 1276, at Chilham Castle, Kent, England.
Before June 7, 1248, at same location alluded to above, he got married aged 36 years, with Lorette/Laurette/Lora de Dover, born in 1222, daughter of Richard Fitz Roy also known as Richard de Warenne and Richard de Chilham and Rohese/Rhoysia/Rose de Dover. 
They had at least one child: John de Marmion.
He was under age in 1243 and in the custody of William de Cauntelo. On 30 Apr 1251 he quit claimed to the Prioress of Fosse the advowson of the church of Willingham in county Lincoln. He was knighted, apparently at the occasion of the knighting of Prince Edward. 
He was in the service of the King in 1259 in France. He took the side of the Barons against Henry III, and, as a supporter of Simon de Montfort, was summoned to Parliament 24 Dec 1264. He was among the "disinherited" who were admitted to the Kings peace July 1, 1267, and pardoned for their trespasses. 
He was deceased by 1276, when his son, John, did homage to the Abbot of Peterborough.

Birth	1212	Kent, England
Marriage	1248	Lorette de Dover
Death	27 Jul 1275	Chilham, Ashford Borough, Kent, England
Burial		St Mary Churchyard, Chilham, Ashford Borough, Kent, England

Spouse	Lorette de Dover (1222 - 1275)
Child	Sir John Marmion I (1262 - 1322)

Notes