Henry Percy, 1st Earl of Northumberland
Henry Percy, 1st Earl of Northumberland, 4th Baron Percy, titular King of Mann, KG, Lord Marshal( 10 November 134120 February 1408) was the son of Henry de Percy, 3rd Baron Percy, and a descendant of Henry III of England.
His mother was Mary of Lancaster, daughter of Henry, 3rd Earl of Lancaster, son of Edmund, Earl of Leicester and Lancaster, who was the son of Henry III.
Henry II, Count of Louvain
Henry II (German: "Heinrich", Dutch: "Hendrik", French: "Henri") was Count of Louvain (Leuven) from 1054 through 1071 .
Henry II was the son of Lambert II, Count of Louvain and Oda of Verdun.
His maternal uncles included Pope Stephen X and Godfrey the Bearded, Duke of Lorraine.
Henry III, Count of Gorizia
Henry III, Count of Gorizia( 1263- 1323) was a member of the Meinhardiner dynasty.
Henry III, Count of Louvain
Henry III of Louvain (German: "Heinrich", Dutch:"Hendrik", French: "Henri"; died 1095), was count of Louvain (Leuven) and landgrave of Brabant, son of Henry II (c. 1020–1078), count of Louvain and Brussels, and Adela of Orthen (or Betuwe), a daughter of Count Everard of Orthen.
Frederick of Liege
Frederick was Bishop of Liege, son of Albert III, Count of Namur.
Godfrey I, Count of Louvain came into conflict with Otbert, Bishop of Liège, over the county of Brunengeruz that both claimed.
In 1099, Emperor Henry IV allotted the county to his close supporter, the bishop, who entrusted it to Albert III, Count of Namur.
Bishop Otbert died in 1119.
Two separate candidates were elected to replace him and Godfrey sided with the loser.
Frederick became Bishop of Liege succeeding Bishop Alexander( who was forced to stand down after being charged with acts of simony, 1119).
As a result, the newly appointed Bishop Frederick suffered open animosity from Alexander ’s supporters.
It is believed that Frederick was poisoned by the count of Louvain, and suffered death in 1121.
Henry I, Count of Louvain
Henry I was Count of Louvain from 1015 until 1038.
Henry III, Count of Schauenburg-Holstein
Henry III, Count of Schauenburg- Holstein( d. February 1421 in Bordesholm) was Bishop of Osnabrück as Henry I from 1402 to 1410, and also Count of Holstein- Rendsburg from 1404 until his death.
He was the youngest son of Henry II and his second wife Ingeborg of Mecklenburg- Schwerin.
Lambert I, Count of Louvain
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.
He was the son of Reginar III, Count of Hainaut and Adela d' Eguisheim, daughter of Hugh V, Count of Eguisheim.
His brother was Reginar IV, Count of Mons.
He was the husband of Gerberga of Lower Lorraine, and father of:
Gertrude of Flanders, Duchess of Lorraine
Gertrude of Flanders( c. 1070 – 1117), was a Countess of Louvain and Landgravine of Brabant by marriage to Henry III, Count of Leuven, and a Duchess of Lorraine by marriage to Theodoric II, Duke of Lorraine.
At the time the duchy was the upper Lorraine, since 959 separated from the duchy of Lower Lorraine.
Henry Bryant (naturalist)
Henry Bryant( May 12, 1820 – February 2, 1867) was an American physician and naturalist.
He was the grandfather of Henry Bryant Bigelow.

Question: Who is Henry Iii, Count Of Louvain's paternal grandfather?