Question: The Abbey of Saint-Étienne was founded by a descendant of who?

full_context: Document 1: Bassac Abbey: Bassac Abbey (French: "Abbaye Saint-Étienne de Bassac" ) is an 11th-century Romanesque style abbey in Bassac, Charente and part of the Ancient Diocese of Saintes . The church was founded in 1002 by Wardrade Loriches, count of la Marche and first known Lord of Jarnac. It was built to 1015 by Angel de Grimoard, Bishop of Angoulême, and his brother Iso, Bishop of Saintes. In 1095 it was made subservient to the Abbey of Saint-Jean-D'Angely by Pope Urban II; it regained its independence in 1246. Bassac Abbey was largely reconstructed under Guillaume de Vibrac, Abbot from 1247 to 1286.
Document 2: Abbey of Saint-Étienne, Caen: The Abbey of Saint-Étienne, also known as Abbaye aux Hommes ("Men's Abbey") by contrast with the Abbaye aux Dames ("Ladies' Abbey"), is a former Benedictine monastery in the French city of Caen, Normandy, dedicated to Saint Stephen. It was founded in 1063 by William the Conqueror and is one of the most important Romanesque buildings in Normandy.
Document 3: San Esteban de Deyo: San Esteban de Deyo, also called the Castillo de Monjardín, is a ruined castle on a hill overlooking Villamayor de Monjardín in Navarre. The castle lies at an elevation of 890 metres. The castle has a Roman foundation, but was repeatedly rebuilt over the centuries. It was one of the last fortresses of the Banu Qasi, the local Muslim dynasty, before it was taken by King Sancho I of Navarre in 914. According to the "Historia Caroli Magni et Rotholandi"—a legendary retelling of the lives of Charlemagne and Roland found in the 12th-century Codex Calixtinus—the castle was actually taken by Charlemagne from a Navarrese prince named Furré. Only the walls of the castle stand today. Many of the stones were taken to build a Baroque hermitage, the Ermita de San Esteban, in the 17th century.
Document 4: St. Stephen's Basilica, Jerusalem: The St. Stephen's Basilica (Hebrew: מנזר סנט אטיין‎ ‎ ) or simply the Church of St. Stephen, also known by its French name, Saint-Étienne, is the name given to a Catholic church located outside the walls of the Old City of Jerusalem, on the road leading north to Nablus. It is next to the convent of St. Stephen, home to the French Bible and Archaeology School (École biblique et archéologique française de Jérusalem), and the convent church. An old tradition sees this place as the place where the martyrdom of Saint Stephen took place, the martyr deacon mentioned in the book of Acts ( ). A rival site is located in the Kidron Valley.
Document 5: Simeon (abbot): Simeon (died 21 November 1093) was a relative of King William I of England and the brother of Walkelin, Bishop of Winchester. It was through his brother's influence that Simeon was made prior of Winchester, then in 1082 Abbot of Ely, where he began work on the present Ely Cathedral. He recovered for the monastery of Ely the lands which had been allotted to the Normans during their siege of the island of Ely when it was held by Hereward the Wake.
Document 6: 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.
Document 7: St. Vincent Abbey, Senlis: The Royal Abbey of St. Vincent was a former monastery of canons regular in Senlis, Oise, which was destroyed during the French Revolution. Late in their history, they became part of a new congregation of canons regular with the motherhouse at the Royal Abbey of St Genevieve in Paris, known as the "Genofévains", widely respected for their institutions of learning.
Document 8: 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 9: 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 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: 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 12: 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 13: 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 14: Sibton Abbey: Sibton Abbey, an early Cistercian abbey located near Yoxford, Suffolk, was founded about 1150 by William de Chesney, High Sheriff of Norfolk and Suffolk. A sister house of Warden Abbey, near Bedford, Bedfordshire, Sibton Abbey was the only Cistercian abbey in East Anglia.
Document 15: 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.
ground_truth: Rollo