Our St. Clair / Sinclair DNA members have thousands of different surnames in our SNP matches. But only one Sinclair DNA Lineage that i know of has the surname Mandeville in their matches - the Herdmanston St Clairs.
Why this is important
The Mandeville family were associated with the following priories”
Eye Priory - William de Mandeville (d.c. 1130) married Margaret, daughter of Eudo Dapifer. Most of you will be very familiar with the relationship between Eudo and the St. Clair family in England and Normandy. Loyd (p. 88) has “William de St. Clair gave the church of Hamerton, co. Huntingdon, to St. John’s abbey at Colchester, and also his ‘tenura’ in Greenstead, Essex, for the health of Hamo de St. Clair his brother, mentioning his lord Eudo dapifer.” Just above that, Loyd says this branch of the family are of Saint-Clair-sur-Elle in the department of Manche, arrondissement of St-Lo, the canton of Saint-Clair.
Hurley Priory - Hurley Priory was founded circa 1087 by Geoffrey I de Mandeville. Hurley was located far from the Mandeville seat of power, Pleshey, in the heart of Essex, 14 kilometers north-west of Chelmsford. Mandeville had received Pleshey, in the parish of High Easter (southwest of Braintree), from William the Conqueror after Mandeville’s help leading the Norman Conquest. Unfortunately, Pleshey was far enough away that Hurley didn’t receive the attention that such priories expected from wealthy benefactors.
Hurley was a cell of Westminster Abbey.
Wethered (p. 229) has Henry de Ver (Vaux) witnessing a chatter of William de Mandeville, 3rd Earl of Essex (1166 - 1169) to Hurley. In this charter, he granted his entire rent in Hurley and property in Little Waltham to the monks. Some other witnesses of interest were William, Abbot of Mortemer; Richard de Monteinni; and Robert de Luuetot.
That Vaux witness is of interest because they later gave land to Dryburgh Abbey in the Borders of Scotland, built by Hugh de Morville, whose descendant (Richard de Morville) gave the St. Clairs their land of Herdmanston.
Westminster Abbey - Geoffrey de Mandeville granted the estate of Eye to Westminster Abbey c. 1085 x ‘97 (Wareham p. 118).
William Martel’s father, Geoffrey, was a tenant of Geoffrey de Mandeville in Essex in 1086 (Brown p. 27). I’ve done a lot of digging into the Martel family. You don’t have to dig far before you get back to Charlemagne. This is very interesting.
Geoffrey I de Mandeville and his first wife were buried at Westminster Abbey.
Walden Monastery (c. 1190)
Earl Geoffrey de Mandeville II (d. 1144) founded Walden. Wareham (p. 118) uses the Mandeville relationship with Walden Monastery as an example of how the powerful people of the 12th century had changed their attitudes about supporting religious houses. Mandeville didn’t grant them many churches or great farm land.
Plympton Priory, founded in 1121, was a priory in Devon, England which was important to bother Devon and Cornwall. It was a house of Augustinian canons (Fizzard, p. 15). There was a collegiate church at Plympton in the 11th century. Henry II gave Plympton priory a confirmation charter in 1158.
By the early 12th century, Plympton benefited from the arrival of the Redver family of Devon. Richard de Redvers received the Honour of Plympton from Henry I. Redvers granted the priory lands of Ridgeway in Plympton, and an aqueduct. Baldwin de Redvers also was a benefactor of Plympton. Given the Redvers connection to the Morville family, and thus the St. Clairs of Herdmanston, this does not surprise me.
Stephen de Mandeville, lord of the Honour or Erlstoke in Somerset, was associated with Baldwin de Redvers. Stephen also gave land to Plympton - specifically, the manor of Strete.
During the reign on Henry II, Roger de Mandeville (son of Stephen) confirmed the gift of the church of Avetona (Blackawton) to Plympton priory. William Fitz Stephen may have given the church of Dean (Fizzard p. 61).
In her footnotes on page 79, Fizzard mentions a confusing fragment referring to Wimundus and “Claritia de Vaus.” As explanation, she mentions that Hubert de Vaux was a tenant of the Redvers family who left England in 1149. (Her source Bearman, p. 38). This makes a great deal of sense given what we’ve discovered about the de Vaux connections to the Herdmanstons in Scotland both at Fidra Island and at Dryburgh Abbey.
Brown, Vivian, “Eye Priory Cartulary and Charters, Part 2,” The Boydell Press 1994 ISBN 0 85115 347 X
Fizzard, Allison D., “Plympton Priory: A House of Augustinian Canons in South-Western England in the Late Middle Ages,” Hotei Publishers, 2008. ISSN 1572-4107, ISBN 978 90 04 16301 0
Heale, Martin, “The Dependent Priories of Medieval English Monasteries,” The Boydell Press, Woodbridge, 2004. ISBN 1 84383 054 X
Loyd, Lewis C. “The Origins of Some Anglo-Norman Families,” Genealogical Publishing Company, 1951 ISBN 0806306491
Lee, Frederick George, “The history, description and antiquities of the prebendal church of the Blessed Virgin Mary of Thame, in the county and diocese of Oxford” Mitchell and Hughes, 1883
Tanner, Heather J., “Families, Friends, and Allies: Boulogne and Politics in Northern France and England, c. 879 - 1160,” Koninklijke Brill NV, Leiden, The Netherlands 2004 ISBN 90-04-13243-0
Vincent, Nicholas, “Warin and Henry Fitz Gerald, the King’s Chamberlains: The Origins of the Fitzgeralds Revisited,” a paper published in “Anglo-Norman Studies XXI: Proceedings of the Battle Conference 1998,” Edited by Christopher Harper-Bill, The Boydell Press, Woodbridge 1999 ISBN 0 85115 745 9
Wareham, Andrew, “Lords and Communities in Early Medieval East Anglia,” Boydell Press, Jan 1, 2005 ISBN 1 84383 155 4
Wethered, Reverend F.T., “St. Mary’s, Hurley, in the Middle Ages: Based on Hurley Charters and Deeds,” Printed at the Bedford Press, 1898