Louis I, Count of Loon
Louis I, Count of Loon( Looz)( after 1107 – 11 August 1171) was the Count of Loon, which he inherited from his father.
He ruled from approximately 1139 until his death.
Henry, Count of Looz
Henry( d. 2 August 1218), Count of Looz and Count of Duras, son of Gérard II, Count of Looz, and Adelaide of Gelderland, daughter of Henry I, Count of Guelders, and Agnes of Arnstein, daughter of Louis III of Arnstein.
Henry was Canon of St. Lambert in Liège, Provost of the Franciscans in Maastricht, and Provost of St. Alexander in Aschaffenburg.
Henry was Count of Looz for a few days in 1218, but died of poisoning.
He married Mechtild, daughter of Frederick III, Count of Vlanden.
Henry and Mechtild had one daughter:
He was succeeded as Count of Looz by his brother Arnold, and was the last recorded Count of Duras.
Charlotte of Lorraine
Charlotte de Lorraine- Armagnac( 6 May 1678 – 21 January 1757) was a Princess of Lorraine by birth and daughter of Louis, Count of Armagnac.
She was known as" Mademoiselle d' Armagnac" and died unmarried.
Louis I, Count of Löwenstein
Louis I, Count of Löwenstein( 29 September 1463 in Heidelberg – 28 March 1523 in Löwenstein) was the founder of the House of Lowenstein- Wertheim.
Simon Louis, Count of Lippe
Simon Louis, Count of Lippe( 14 March 1610 at Brake Castle – 8 August 1636 in Detmold), was Count of Lippe- Detmold from 1627 until his death.
Charles d'Évreux
Charles d'Évreux (1305 – 5 September 1336) was the son of Louis, Count of Évreux and Margaret of Artois.
From his father, he inherited the lordship of Étampes, which was made a county in 1327.
He married Maria de La Cerda y de Lara, the daughter of Fernando de la Cerda, in April 1335 at Poissy.
They had two children:
William XII, Count of Auvergne
William XII of Auvergne( 1300 – 1332) was Count of Auvergne and Count of Boulogne between 1325 and 1332.
He was the eldest son of Robert VII of Auvergne and Blanche of Bourbon, daughter of Robert, Count of Clermont.
He married Margaret of Évreux( 1307 – 1350), daughter of Louis, Count of Évreux and Margaret of Artois .< br>
William died young and had only one daughter:
Louis I, Count of Étampes
Louis d'Évreux, Count of Étampes (1336 – 6 May 1400) was the son of Charles d'Évreux and Maria de La Cerda y Lara.
According to Froissart he was captured at Poitiers and ransomed.
He later served as one of the royal hostages given to Edward III of England to guarantee the Treaty of Brétigny.
In the 1390s, Louis was included in the entourage of John, Duke of Berry, who ultimately succeeded him in Étampes.
He married Jeanne (d. 1389), daughter of Raoul I of Brienne, Count of Eu and widow of Walter VI of Brienne, but they had no children.
Alix of France
Alix of France( July – August 1150 – 1197/1198) was countess consort of Blois by marriage to Theobald V, Count of Blois.
She was regent of Blois during the absence of her spouse in 1190- 1191, and regent during the minority of Louis I, Count of Blois from 1191 until 1197.
Philipp Louis, Count of Erbach-Erbach
Philipp Louis, Count of Erbach- Erbach( 10 June 1669 – 17 June 1720), was a German prince member of the House of Erbach and ruler over Erbach, Freienstein, Wildenstein, Michelstadt and Breuberg.
Born in Erbach, he was the third child and eldest son of George Louis I, Count of Erbach- Erbach and his wife Countess Amalia Katharina of Waldeck- Eisenberg, a daughter of Philipp Dietrich, Count of Waldeck- Eisenberg.

Question: Who is Louis I, Count Of Étampes's paternal grandfather?
Answer: Louis, Count of Évreux