question: Who was the father of the man who refused to grant Lower Lorraine to Henry II, Duke of Limburg?
answer: Duke Frederick I
context: Title: Frederick, Duke of Lower Lorraine
  Passage: Frederick, Duke of Lower Lorraine, also known as "Frederick of Luxembourg" (  1003 – 18 May 1065) was the count of Malmedy from 1035 and Duke of Lower Lorraine from 1046.  He was a younger son of Frederick, Lord of Gleiberg.
  Title: Henry II, Duke of Limburg
  Passage: 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.
  Title: List of Dukes of Limburg
  Passage: The counts of Limburg were the original rulers of the Duchy of Limburg and rose to prominence when one of their house was appointed Duke of Lower Lorraine.
  Title: Conrad III of Germany
  Passage: 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.
  Title: Waleran, Duke of Lower Lorraine
  Passage: 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.
  Title: Lambert I, Count of Louvain
  Passage: Lambert I of Louvain nicknamed "The Bearded" (born in Louvain, Duchy of Lotharingia, East Francia c. 950, died in Florennes, County of Namur, Duchy of Lower Lorraine, Holy Roman Empire on 12 September 1015) was the first Count of Louvain in 1003.  He was killed by Godfrey II, Duke of Lower Lorraine in battle for Godfrey's claim of Count of Verdun.
  Title: Gerberga of Lower Lorraine
  Passage: Gerberga of Lower Lorraine, Countess of Louvain, was the daughter of Charles, Duke of Lower Lorraine, himself the son of Louis IV of France and Gerberga of Saxony.  She married Lambert I, Count of Louvain and had three children with him:
citations: Henry II, Duke of Limburg Conrad III of Germany