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.
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.
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.
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".
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.
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.
Konrad von Thüringen
Konrad von Thüringen( c. 1206 – 24 July 1240) was the fifth Grand Master of the Teutonic Knights, serving from 1239 to 1240.
A Landgrave of Thuringia from 1231 to 1234, he was the first major noble to join the military order.
Conrad was the youngest son of Hermann I, Landgrave of Thuringia, and Sophia, a daughter of Otto I, Duke of Bavaria.
His elder brother Louis IV of Thuringia was married to Saint Elisabeth of Hungary.
When Louis died in 1227 during the Sixth Crusade, his brother Henry Raspe became regent for Louis' minor son Herman II, and Conrad took on the title of Count of Gudensberg in Hesse, assisting his brother in ruling the area.
On Elisabeth's death in 1231, Henry Raspe took Thuringia for himself, and together with Conrad, worked to consolidate power.
Conrad engaged in battle a number of times with Siegfried III, Archbishop of Mainz, at one point personally swinging him around and threatening to cut him in two.
In 1232, he besieged the city of Fritzlar, massacring its populace and burning the church.
Elisabeth had founded a hospital in Marburg and had intended to bequeath it to the Johanniter Order, but this was rejected by her" defensor", Conrad of Marburg.
Pope Gregory IX sent a commission to settle the matter, and it decided in favor of Conrad of Marburg on 2 August 1232.
In the summer of 1234, Conrad travelled to Rome and convinced the Curia to turn the hospital and parish church in Marburg over to the Teutonic Knights, which had founded a house in the city the previous year.
In November, Conrad set aside his temporal title and entered the Teutonic Order himself.
The next year, he joined the commission to Rome that represented his sister- in- law in the canonization process, and he remained in the court of the Pope until Pentecost of 1235 when she was declared a saint.
Upon the death of Hermann von Salza, Conrad became the Grand Master of the Teutonic Knights.
While on a trip to Rome in the early summer of 1240, he fell ill and died.
He was buried in the Elisabeth Church in Marburg.
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.

Question: What is the date of death of Henry Raspe, Landgrave Of Thuringia's father?
Answer: 25 April 1217