Question: Who was a soldier that later achieved several manors as a baron from the first Norman King of England?

full_context: Document 1: Alan Rufus: Alan Rufus (alternatively Alanus Rufus (Latin), Alan ar Rouz (Breton), Alain le Roux (French) or Alan the Red (c. 1040 – 1093), 1st Lord of Richmond, was a relative and companion of William the Conqueror (Duke William II of Normandy) during the Norman Conquest of England. He was the second son of Eozen Penteur (also known as Eudon, Eudo or Odo, Count of Penthièvre) by Orguen Kernev (also known as Agnes of Cornouaille). William the Conqueror granted Alan Rufus a significant English fief, later known as the Honour of Richmond, in about 1071.
Document 2: William the Conqueror: William I (c. 1028 – 9 September 1087), usually known as William the Conqueror and sometimes William the Bastard, was the first Norman King of England, reigning from 1066 until his death in 1087. A descendant of Rollo, he was Duke of Normandy (as Duke William II) from 1035 onward. After a long struggle to establish his power, by 1060 his hold on Normandy was secure, and he launched the Norman conquest of England six years later. The rest of his life was marked by struggles to consolidate his hold over England and his continental lands and by difficulties with his eldest son.
Document 3: Edmund Ironside: Edmund II (died 30 November 1016), usually known as Edmund Ironside, was King of England from 23 April to 30 November 1016. He was the son of King Æthelred the Unready and his first wife, Ælfgifu of York. Edmund's reign was marred by a war he had inherited from his father, his cognomen "Ironside" was given to him "because of his valour" in resisting the Danish invasion led by Cnut the Great.
Document 4: Eustace de Balliol: Eustace de Balliol (or Eustace de Helicourt) (died c. 1209) was the cousin and successor of Bernard II de Balliol, lord of Balliol and Barnard Castle. He was the lord of Hélicourt in Picardy, an estate near the chief seat of the main Balliol line at Bailleul-en-Vimeu; after his cousin died childless, in 1190 Eustace de Helicourt took over those estates and remarried. In 1189–95 he quitclaimed the manor of Long Newton, Durham to Hugh du Puiset, Bishop of Durham, as well as all the land that Bernard de Balliol held in the vill of Newhouse. In 1199–1200, as heir of Bernard de Balliol, he rendered account of 60 marks for his scutage, of which he had paid 10 marks; he also owed £120 for the second and third scutages of King Richard I, which was remitted by brief of King John. Sometime in the period, 1199–1205, he confirmed to St. Mary’s, York the advowsons of the churches of Gainford and Stainton, Durham and Stokesley, Yorkshire and their tithes which Guy de Balliol previously granted them. In 1200 he and his son, Hugh, quitclaimed by fine to Robert, Abbot of York the advowsons of the church of Gainford, Durham, and the chapels of Barnard Castle, Middleton, Denton, Houghton-le-Side, and Snow Hall (in Gainford), Durham.
Document 5: Norman invasion of Wales: The Norman invasion of Wales began shortly after the Norman conquest of England under William the Conqueror, who believed England to be his birthright. Initially (1067–1081), the invasion of Wales was not undertaken with the fervor and purpose of the invasion of England. However, a much stronger Norman invasion began in 1081 and by 1094 most of Wales was under the control of William's eldest son, King William II of England. The Welsh greatly disliked the "gratuitously cruel" Normans and by 1101 had regained control of the greater part of their country under the long reign of King Gruffudd ap Cynan, who had been imprisoned by the Normans for twelve years before his escape. Gruffudd had some indirect help from King Magnus III of Norway (Magnus Barefoot) who attacked the Normans briefly off the Isle of Anglesey in northwest Wales near Ynys Seiriol, killing Hugh of Montgomery, 2nd Earl of Shrewsbury and leaving the Normans depleted and demoralized. Magnus went on to take the Orkney Islands, the Hebrides, and the Isle of Man, islands north of Wales and west and north of Scotland and England, in 1098.
Document 6: Eustace de Montaut: Eustace de Montaut, or Monte Alto, Montalt, Monhaut, or FitzNorman (ca. 1027-1112), was a Breton soldier, and later baron, who fought on the side of the Normans in the Norman Conquest of England in 1066 and for his achievements was granted several manors by the new king, William the Conqueror.
Document 7: Azor (landowner): Azor was one of the most powerful English landowners at the time of Edward the Confessor in the 11th century. He was a kinsman and chamberlain of Brihtheah, a bishop of Worcester and a former abbot of Pershore. He owned property from Lincolnshire down to the Isle of Wight in many counties and like another great landowner of the times, Toki, he also owned urban property in addition to his vast possession of lavish country estates. He is mentioned in the Domesday Book and appears in countless histories of English counties along with his sons,
Document 8: Lords and Counts of Harcourt: When the Viking chieftain Rollo obtained via the Treaty of Saint-Clair-sur-Epte the territories which would later make up Normandy, he distributed them as estates among his main supporters. Among these lands were the seigneurie of Harcourt, near Brionne, and the county of Pont-Audemer, both of which Rollo granted to Bernard the Dane, ancestor of the lords ("seigneurs") of Harcourt. The first to use Harcourt as a name, however, was Anquetil d'Harcourt at the start of the 11th century.
Document 9: Roger de Breteuil, 2nd Earl of Hereford: Roger de Breteuil, 2nd Earl of Hereford (1056 – after 1087), succeeded in 1071 to the earldom of Hereford and the English estate of his father, William Fitz-Osbern. He is known to history for his role in the Revolt of the Earls
Document 10: England in the High Middle Ages: England in the High Middle Ages includes the history of England between the Norman Conquest in 1066 and the death of King John, considered by some to be the last of the Angevin kings of England, in 1216. A disputed succession and victory at the Battle of Hastings led to the conquest of England by William of Normandy in 1066. This linked the crown of England with possessions in France and brought a new aristocracy to the country that dominated landholding, government and the church. They brought with them the French language and maintained their rule through a system of castles and the introduction of a feudal system of landholding. By the time of William's death in 1087, England formed the largest part of an Anglo-Norman empire, ruled by nobles with landholdings across England, Normandy and Wales. William's sons disputed succession to his lands, with William II emerging as ruler of England and much of Normandy. On his death in 1100 his younger brother claimed the throne as Henry I and defeated his brother Robert to reunite England and Normandy. Henry was a ruthless yet effective king, but after the death of his only male heir in the White Ship tragedy, he persuaded his barons to recognise his daughter Matilda as heir. When Henry died in 1135 her cousin Stephen of Blois had himself proclaimed king, leading to a civil war known as The Anarchy. Eventually Stephen recognised Matilda's son Henry as his heir and when Stephen died in 1154, he succeeded as Henry II.
Document 11: Ancestry of the Godwins: Very little is known for certain of the ancestry of the Godwins, the family of the last Anglo-Saxon King of England, Harold II. When King Edward the Confessor died in January 1066 his closest relative was his great-nephew, Edgar the Ætheling, but he was young and lacked powerful supporters. Harold was the head of the most powerful family in England and Edward's brother-in-law, and he became king. In September 1066 Harold defeated and killed King Harald Hardrada of Norway at the Battle of Stamford Bridge, and Harold was himself defeated and killed the following month by William the Conqueror at the Battle of Hastings.
Document 12: Hamon de Massey: The first Hamon de Massey was the owner of the manors of Agden, Baguley, Bowdon, Dunham, Hale and Little Bollington after the Norman conquest of England (1066), taking over from the Saxon thegn Aelfward according to Domesday Book. His probable birthplace was La Ferté-Macé or Ferté de La Macé, a recently constructed fortress in Normandy. Hamon was made a baron by Hugh Lupus, by his right as Earl of Chester, from 1071.
Document 13: Robert Fitzhamon: Robert Fitzhamon (died March 1107), or Robert FitzHamon, Seigneur de Creully in the Calvados region and Torigny in the Manche region of Normandy, was the first Norman feudal baron of Gloucester and the Norman conqueror of Glamorgan, southern Wales. He became Lord of Glamorgan in 1075.
Document 14: Amatus of Montecassino: Amatus of Montecassino (Latin: Amatus Casinensis ), (11th century) was a Benedictine monk of the Abbey of Montecassino who is best known for his historical chronicles of his era. His "History of the Normans" (which has survived only in its medieval French translation, "L'Ystoire de li Normant"), is one of three principle primary sources for the Norman Conquest of southern Italy--the other two being the histories of William of Apulia and Geoffrey Malaterra. Amatus describes the Normans from the perspective of his abbey, one of the most important religious and cultural centers in Italy at the time. His history is the earliest extant account of the Norman sieges of Bari and Salerno, their conquest of Sicily, and the careers of both Robert Guiscard and Richard Drengot, as well as the Gregorian Reforms seen from the papal point of view.
Document 15: Laws of William the Conqueror: William the conqueror, the first Norman King of England who reigned from 1066 until his death in 1087, created 10 laws for the English people to abide by after the Battle of Hastings.
ground_truth: Eustace de Montaut