George I, Landgrave of Hesse-Darmstadt
George I of Hesse-Darmstadt (10 September 1547 – 7 February 1596) was the Landgrave of Hesse-Darmstadt from 1567 to 1596.
Born on 10 September 1547 in Kassel, he was the fourth son of Philip I the Magnanimous of Hesse and Christine of Saxony.
Following his father's death in 1567 Hesse was divided between his four sons.
George I received the upper County of Katzenelnbogen and selected Darmstadt as his residence.
He died on 7 February 1596 and the Landgraviate was passed to his son Louis.
On 17 August 1572, he married Magdalene of Lippe (1552–1587).
They had 10 children.
On 25 May 1589, he married Eleonore of Württemberg (1552–1618).
They had 1 child:
Christine of Saxony
Christine of Saxony (25 December 1505 – 15 April 1549) was a German noble, landgravine of Hesse.
She was the regent of Hesse in 1547-1549.
She was the daughter of George the Bearded, Duke of Saxony and Barbara Jagiellon.
On 11 December 1523 in Kassel, she married Landgrave Philip I, Landgrave of Hesse.
The marriage was arranged to forge an alliance between Hesse and Saxony and was unhappy; Philip claimed to be disgusted by her and only shared her bed by duty.
They had ten children.
Whilst married to Christine, Philip practised bigamy and had another nine children with his other (morganatic) wife, Margarethe von der Saale; in 1540, Christine gave her consent to her husband's bigamy with his lover because of her view upon him as her sovereign.
Margarethe von der Saale, however, was never seen at court.
During Philip's absence and captivity in 1547-49, Christine was regent jointly with her oldest son.
Louis VI, Landgrave of Hesse-Darmstadt
Louis VI of Hesse-Darmstadt  (25 January 1630 – 24 April 1678) was Landgrave of Hesse-Darmstadt from 1661 to 1678.
He was the eldest of three sons of the Landgrave George II of Hesse-Darmstadt and Sophia Eleonore of Saxony.
Landgravine Auguste of Hesse-Homburg
Landgravine" Auguste" Fredericka of Hesse- Homburg( full German name:" Auguste Friederike, Landgräfin von Hessen- Homburg"; 28 November 1776, Bad Homburg vor der Höhe, Landgraviate of Hesse- Homburg, Holy Roman Empire – 1 April 1871, Ludwigslust, Grand Duchy of Mecklenburg- Schwerin), was a member of the House of Hesse and a Landgravine of Hesse- Homburg by birth.
Through her marriage she was also a member of the House of Mecklenburg and Hereditary Grand Duchess of Mecklenburg- Schwerin.
She was the sixth child and fourth daughter of Frederick V, Landgrave of Hesse- Homburg and his wife Landgravine Caroline of Hesse- Darmstadt, in turn daughter of Louis IX, Landgrave of Hesse- Darmstadt.
Charles I, Landgrave of Hesse-Philippsthal
Charles I, Landgrave of Hesse- Philippsthal( 23 September 1682 – 8 May 1770) was a member of the House of Hesse and Landgrave of Hesse- Philippsthal from 1721 until his death.
Prince Charles William of Hesse-Darmstadt
Karl Wilhelm of Hesse- Darmstadt( 17 June 1693, Nidda- 17 May 1707, Gießen) was a Prince of Hesse- Darmstadt.
Louis V, Landgrave of Hesse-Darmstadt
Louis V of Hesse-Darmstadt (24 September 1577 – 27 July 1626) was the Landgrave of Hesse-Darmstadt from 1596 to 1626.
He was born on 24 September 1577 as the son of George I, Landgrave of Hesse-Darmstadt and Magdalene of Lippe.
In 1604 he inherited a part of Hessen-Marburg after the death of Louis IV of Hesse-Marburg who was childless.
The other half went to Maurice of Hesse-Kassel (or Hesse-Cassel), but since Maurice was a Calvinist, Ludwig claimed a right on the whole of Hesse-Marburg.
Lutheran professors of the University of Marburg who refused to convert to Calvinism founded in 1607 the University of Gießen which was named "Ludoviciana".
This led to a conflict during the Thirty Years' War, between Louis V, who stood on the side of the Emperor, and Maurice, who was on the side of the Protestants.
Hesse-Darmstadt suffered severely from the ravages from the Swedes during the conflict.
The Landgrave died in 1626 and he was succeeded by George II, Landgrave of Hesse-Darmstadt.
In 1722, Johann Georg Liebknecht, an astronomer at the University of Gießen, named a star, which he thought was a planet, Sidus Ludoviciana after Ludwig V.
Princess Caroline of Hesse-Darmstadt
Caroline of Hesse-Darmstadt (2 March 1746, Buchsweiler – 18 September 1821, Homburg) was Landgravine consort of Hesse-Homburg by marriage to Frederick V, Landgrave of Hesse-Homburg.
She was the eldest daughter of Louis IX, Landgrave of Hesse-Darmstadt and his wife Caroline.
She married Frederick V, Landgrave of Hesse-Homburg on 27 September 1768.
The marriage was contracted for diplomatic and political reasons as the symbol of an inheritance dispute between their respective families.
Caroline and Frederick V produced many children but their marriage never developed into a personal relationship, and they lived mostly separated lives.
Caroline often spent time in the famed little villa that was given to her use in the forest near Homburg.
Louis VIII, Landgrave of Hesse-Darmstadt
Louis VIII (German: "Ludwig") (5 April 1691 – 17 October 1768) was the Landgrave of Hesse-Darmstadt from 1739 to 1768.
He was the son of Ernest Louis, Landgrave of Hesse-Darmstadt and Margravine Dorothea Charlotte of Brandenburg-Ansbach.
Magdalene of Lippe
Magdalena of Lippe( 25 February 1552, Detmold – 26 February 1587, Darmstadt) was a German noblewoman.
She was a Countess of Lippe by birth.
By her marriage to George I, Landgrave of Hesse- Darmstadt she was the first Landgravine of Hesse- Darmstadt.

Question: What nationality is George I, Landgrave Of Hesse-Darmstadt's mother?
Answer: German