Question: Who was the father of the man who refused to grant Lower Lorraine to Henry II, Duke of Limburg?

full_context: Document 1: Henry II, Duke of Limburg: Henry II (  1111 – August 1167) was the duke of Limburg from 1139 and count of Arlon from 1147 to his death. He was the son of Waleran, Duke of Lower Lorraine, and Jutta of Guelders, daughter of Gerard I of Guelders. He succeeded his father in Limburg with the title of duke, but Conrad III refused to grant him Lower Lorraine. He continued to style himself as duke nevertheless.
Document 2: Godfrey III, Duke of Lower Lorraine: Godfrey III (  997 –1069), called the Bearded, was the eldest son of Gothelo I, Duke of Upper and Lower Lorraine. By inheritance, he was Count of Verdun and he became Margrave of Antwerp as a vassal of the Duke of Lower Lorraine. The Holy Roman Emperor Henry III authorized him to succeed his father as Duke of Upper Lorraine in 1044, but refused him the ducal title in Lower Lorraine, for he feared the power of a united duchy. Instead Henry threatened to appoint a younger son, Gothelo, as Duke in Lower Lorraine. At a much later date, Godfrey became Duke of Lower Lorraine, but he had lost the upper duchy by that point in time.
Document 3: Henry II of France: Henry II (French: "Henri II" ; 31 March 1519 – 10 July 1559) was a monarch of the House of Valois who ruled as King of France from 31 March 1547 until his death in 1559. The second son of Francis I, he became Dauphin of France upon the death of his elder brother Francis III, Duke of Brittany, in 1536.
Document 4: Conrad III of Germany: Conrad III (1093 – 15 February 1152) was the first King of Germany of the Hohenstaufen dynasty. He was the son of Duke Frederick I of Swabia and Agnes, a daughter of the Salian Emperor Henry IV.
Document 5: Conrad of Antioch: Conrad of Antioch (Italian: "Corrado d'Antiochia" ; born 1240/41, died after 1312) was a member of the imperial Staufer dynasty and a nobleman of the Kingdom of Sicily. He was the eldest son of Frederick of Antioch, imperial vicar of Tuscany, and Margherita di Poli. He was thus a grandson of the Emperor Frederick II (reigned 1220–50), a nephew of King Manfred of Sicily (1258–66) and cousin of King Conradin (1266–68). His surname, which is contemporary, comes from his paternal grandmother, a mistress of Frederick II, who was from Antioch. He may be called "Conrad I" to distinguish him from his descendants with the same given name.
Document 6: Henry, Duke of Lower Lorraine: Henry I (  1059 – c. 1119) was the count of Limburg and Arlon from 1082 to his death and duke of Lower Lorraine between 1101 and 1106. He was the son of Waleran I of Limburg and Jutta, daughter of Frederick, Duke of Lower Lorraine.
Document 7: Conrad II, Holy Roman Emperor: Conrad II (c. 990 4 June 1039), also known as Conrad the Elder and Conrad the Salic , was Emperor of the Holy Roman Empire from 1027 until his death in 1039. The founder of the Salian dynasty of emperors, Conrad also served as King of Germany from 1024, King of Italy from 1026, and King of Burgundy from 1033.
Document 8: Waleran, Duke of Lower Lorraine: Waleran II (or Walram II) ( 1085 – 1139), called "Paganus" meaning "the Pagan", probably due to a late baptism, was the Duke of Limburg and Count of Arlon () from his father's death in about 1119 until his own twenty years later. He was given the Duchy of Lower Lorraine by Lothair of Supplinburg in 1128 after the latter's accession as King of Germany in 1125.
Document 9: Henry the Lion: Henry the Lion (German: "Heinrich der Löwe" ; 1129/1131 – 6 August 1195 ) was a member of the Welf dynasty and Duke of Saxony, as Henry III, from 1142, and Duke of Bavaria, as Henry XII, from 1156, the duchies of which he held until 1180.
Document 10: Conrad II of Italy: Conrad II (12 February 1074 – 27 July 1101) was the Duke of Lower Lorraine (1076–87), King of Germany (1087–98) and King of Italy (1093–98). He was the second son of Holy Roman Emperor Henry IV and Bertha of Savoy, and their eldest son to reach adulthood, his older brother Henry having been born and died in the same month of August 1071. Conrad's rule in Lorraine and Germany was nominal. He spent most of his life in Italy and there he was king in fact as well as in name.
Document 11: Louis the German: Louis (also Ludwig or Lewis) "the German" (c. 802-876), also known as Louis II, was the first king of East Francia. Grandson of emperor Charlemagne and the third son of emperor of Francia, Louis the Pious and his first wife, Ermengarde of Hesbaye, he received the appellation "Germanicus" shortly after his death in recognition of the fact that the bulk of his kingdom was in the former Germania.
Document 12: Conrad IV of Germany: Conrad (25 April 1228 – 21 May 1254), a member of the Hohenstaufen dynasty, was the only son of Emperor Frederick II from his second marriage with Queen Isabella II of Jerusalem. He inherited the title of a King of Jerusalem (as Conrad II) upon the death of his mother in childbed. Appointed Duke of Swabia in 1235, his father had him elected King of Germany (King of the Romans) and crowned King of Italy (as Conrad IV) in 1237. After the emperor was deposed and died in 1250, he ruled as King of Sicily (Conrad I) until his death.
Document 13: Henry II of England: Henry II (5 March 1133 – 6 July 1189), also known as Henry Curtmantle (French: "Court-manteau" ), Henry FitzEmpress or Henry Plantagenet, ruled as Count of Anjou, Count of Maine, Duke of Normandy, Duke of Aquitaine, Count of Nantes, King of England and Lord of Ireland; at various times, he also controlled Wales, Scotland and Brittany. Henry was the son of Geoffrey of Anjou and Matilda, daughter of Henry I of England. He became actively involved by the age of 14 in his mother's efforts to claim the throne of England, then occupied by Stephen of Blois, and was made Duke of Normandy at 17. He inherited Anjou in 1151 and shortly afterwards married Eleanor of Aquitaine, whose marriage to Louis VII of France had recently been annulled. Stephen agreed to a peace treaty after Henry's military expedition to England in 1153, and Henry inherited the kingdom on Stephen's death a year later.
Document 14: Henry, son of Robert I of Burgundy: Henry of Burgundy (c. 1035 – January 27, 1070/1074), called the Gallant ("le Damoiseau"), was the eldest surviving son and heir of Robert I, Duke of Burgundy and his wife, Helie of Semur, and a grandson of King Robert II of France, thus making him a member of the House of Capet through its Burgundy cadet branch. Little is known about his life and he died shortly before his father, and thus was never duke himself. Two of his sons became dukes in succession after his father's death, while a third son became Count of Portugal through his marriage to Theresa, daughter of King Alfonso VI of León and Castile.
Document 15: Maria of Swabia: Maria of Hohenstaufen (3 April 1201 – 29 March 1235) was a member of the powerful Hohenstaufen dynasty of German kings which lasted from 1138 to 1254. She is also known to history as Marie of Swabia.
ground_truth: Duke Frederick I