From Pam Wilson, Curator: It appears that it is not entirey clear whether Raoul/Ranulf de la Haye was the son of Thurstan Haldup (who was Baron of La Haye-du-Puits) or if Raoul married into the family and gained the title through his wife. Cawley claims the latter, while Davies, a local historian from the Cotentin in Normandy, positions Raoul as Thurstan's son. Here are my notes from Davies' book (which is in French):

In "Les Barons du Cotentin", Alan Davies lists four sons as the children of Turtain Gotz (Thurstan le Goz) and Judith de Monterolier:

• Renouf (mort avant 1090)
• Turstin (Turtain) Haldup, ancestre des barons de La Haye-du-Puits
• Gislebert d'Avranches
• Richard Gotz, dit RIchard d'Avranches (1024-1082), vicomte de lieu en 1050, epousa Emma de Comteville demi-soeur du duc Guillaume

Davies says that Thurstan Haldup was Baron of La Haye-du-Puits et du Plessis; possessed numerous domaines in the Cotentin and Calvados and was the founder of the Abbaya of Lessay in 1056, with the accord of the bishop of Coutances (Geoffroy de Montbray). He died before 1080. From his marriage with Emma/Anne of Normandie, daughter of Richard II, he had notably two sons:

• Raoul, senechal for Count Robert de Mortain, died on crusade. Father of Robert, who became seigneur de La Haye following the death of his uncle Eudes.
• Eudes-au-Capel, baron of La Haye, senechal of Normandy.

Eudes appeared in many charters around 1080, and undertook to resolve the disputes of his office. Benefactor of the Abbey of Lessay, Eudes was buried there 3 Feb 1098, leaving the barony without posterity (no offspring).

His successor was his nephew, Robert de la Haye (Senior), son of Raoul, who inherited the seigneurie and died before 1154. From his marriage with Muriel de Colswein de Lincoln was born

• Richard, baron de La Haye, and
• Raoul, seigneur de Montchaton (on the Seine River, next to the chateau de Regneville), who had many offspring.

The brothers were at the defense of Cherbourg against Geoffroy Plantagenet. Richard, constable of Normandy, baron de la Haye, died in 1169. In 1154 he founded the Abbey of Blanchelande. From his marriage in 1140 with Mathilde de Vernon dame de Varenguebec, were born three daughters, of whom Gillette, who married Richard II du Hommet. Thus the barony of La Haye-du-Puits entered into the Hommet family.

Please note that Davies' account contrasts with that of Cawley in that Davies names Raoul (Ranulf) as the son of Thurstan while Cawley posits that it was in fact Thurstan's daughter who was married to Raoul/Ranulf.

Since the material Cawley cites can be interpreted either way, I am positioning Raoul as Thurstan's son at the moment, pending further research that may resolve the issue.

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Vital Statistics Married Ranulf, Seneschal of Robert de Mortain. They had a son, Robert de la Haye, Her parents were Thurstan (Richard) Haldup and his wife Emma.

Sources and Notes

http://fmg.ac/Projects/MedLands/NORMAN%20NOBILITY.htm#_Toc279557133

1. THURSTAN [Richard] Haldup (-after 1079). "Richardus qui vocatur Turstinus Haralduc cum Emma uxore sua, Eudoque filius eorum" founded the abbey of Essay by undated charter, dated to [1079/87][66]. Henry I King of England confirmed the possessions of Holy Trinity, Lessay, including the donations by "Ricardus qui vocatus est Turstinus Haldup et Eudo filius eius", by charter dated 1126[67]. Henry II King of England confirmed the possessions of the abbey of Lessai, including donations by "Turstini Haldup et Eudonis filii eius" confirmed by "Roberti de Haia et Murielis uxoris sue et Richardi et Radulfi filiorum eorum", by charter dated [1185/Jan 1188][68]. m EMMA, daughter of --- (-after 1079). "Richardus qui vocatur Turstinus Haralduc cum Emma uxore sua, Eudoque filius eorum" founded the abbey of Essay by undated charter, dated to [1079/87][69]. Thurstan & his wife had four children:

a) EUDES

b) EMMA (-[1090/95]).

c) daughter . Her parentage and marriage are confirmed by the foundation charter of the priory in which her son Robert de La Haye names himself "son of Ranulf the seneschal of Robert de Mortain" and "nephew of Eudo dapifer" [son of Thurstan Haldup][77]. m RANULF, son of ---. Seneschal of Robert de Mortain.

d) ADELAIDE .