Henry Raspe, Landgrave of Thuringia
Henry Raspe  (1204 – 16 February 1247) succeeded his nephew Hermann II as Landgrave of Thuringia in central Germany in 1241; he later was elected anti-king in 1246–1247 in opposition to Conrad IV of Germany.
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.
Elisabeth of Brandenburg, Landgravine of Thuringia
Elisabeth of Brandenburg( – 1231) a member of the House of Ascania.
She was a Margravine of Brandenburg by birth and by marriage Landgravine of Thuringia.
She was the daughter of Margrave Albert II of Brandenburg and his wife Matilda of Groitzsch, the daughter of Landgrave Conrad II of Lusatia from the House of Wettin.
In 1228 she married Landgrave Henry Raspe of Thuringia, the later anti-king of Germany.
The marriage remained childless.
Elisabeth died in 1231, at the age of 25, after three years of marriage.
After her death, Henry married Gertrude of Babenberg and after Gertrude's death to Beatrix of Brabant.
All three of his marriages were childless and after his death, the Emperor enfeoffed Thuringia to Henry III, the son of Henry Raspe's sister Jutta.
Hermann II, Landgrave of Thuringia
Hermann II( 28 March 1222 in Creuzburg – 3 January 1241) was the Landgrave of Thuringia and the son of Louis IV, Landgrave of Thuringia, and Saint Elizabeth of Hungary.
Margaret of Thuringia
Margaret of Thuringia or Margaret of Saxony( 1449 – 13 July 1501) was a German noblewoman, Electress of Brandenburg by marriage.
She was the daughter of William III, Landgrave of Thuringia and Anne of Austria, Duchess of Luxembourg" suo jure".
Louis III, Landgrave of Thuringia
Louis III, Landgrave of Thuringia, nicknamed" Louis the Pious" or" Louis the Mild"( 1151/52 – 16 October 1190, in the eastern Mediterranean Sea, near Cyprus) was a German nobleman.
He was a member of the Ludowingians dynasty and was the ruling Landgrave of Thuringia from 1172 until his death.
Hermann I, Landgrave of Thuringia
Hermann I (died 25 April 1217), Landgrave of Thuringia
and (as Hermann III)
Count Palatine of Saxony, was the second son of Louis II, Landgrave of Thuringia ("the Iron"), and Judith of Hohenstaufen, the sister of Emperor Frederick Barbarossa.
Henry I, Landgrave of Hesse
Henry I of Hesse" the Child"( German:" Heinrich das Kind")( 24 June 1244 – 21 December 1308) was the first Landgrave of Hesse.
He was the son of Henry II, Duke of Brabant and Sophie of Thuringia.
Balthasar, Landgrave of Thuringia
Landgrave Balthasar of Thuringia( 21 December 1336 in Weißenfels – 18 May 1406 at the Wartburg in Eisenach) was Margrave of Meissen and Landgrave of Thuringia from the House of Wettin.
Beatrice of Brabant
Beatrice of Brabant( 1225 – 11 November 1288), was a Landgravine consort of Thüringia and a Countess consort of Flanders, married to Henry Raspe, Landgrave of Thuringia, and later to William II, Count of Flanders.
She was the daughter of Henry II, Duke of Brabant, and Marie of Hohenstaufen.
She had no children.

Question: Who is Henry Raspe, Landgrave Of Thuringia's paternal grandfather?
Answer: Louis II