Anne de Bourbon
Anne de Bourbon (1380 – September 1408) was a daughter of John I, Count of La Marche and his wife Catherine of Vendôme.
She was a member of the House of Bourbon.
Arnold V, Count of Loon
Arnold V de Looz,( died August 22, 1327) was Count of Loon from 1279 to 1323 and Count of Chiny( Arnulf III) from 1299 to 1310.
He was the son of John I, Count of Looz and Mathilde Jülich.
Bernard d'Armagnac, Count of Pardiac
Bernard d' Armagnac, Count of Pardiac( died 1462) was a younger son of Bernard VII, Count of Armagnac and Bonne of Berry.
He fought at the Battle of Patay in 1429.
That year he married Eleanor of Bourbon- La Marche, daughter and ultimately heir of James II, Count of La Marche.
He served as lieutenant- general in La Marche and governor of Limousin in 1441, and later as lieutenant- general of Languedoc and Roussillon in 1461.
He was the father of:
William III of Geneva
William III of Geneva( 1280- 1320), Count of Geneva, from 1308 to 1320.
He was the son of count Amadeus II of Geneva, and Agnès, daughter of John, Count of Chalon.
Louis VIII, Duke of Bavaria
Louis VIII of Bavaria( German:" Ludwig VIII der Höckrige", Louis the Hunchback)( 1 September 1403 – 7 April 1445) was Duke of Bavaria- Ingolstadt from 1443 until his death.
He was born in Paris, a son of Louis VII and his first wife Anne de Bourbon- La Marche, a daughter of John I, Count of La Marche.
He died in 1445 at Ingolstadt.
Prince Robert, Count of La Marche
Prince Robert of Orléans, Petit- Fils de France, Count of la Marche( Robert Benoît Paul Henri James Marie; born 6 September 1976 in Edinburgh) is the son of the late Prince Thibaut, Count of La Marche, and Marion Mercedes Gordon- Orr.
His paternal grandfather was the late Henri, Count of Paris, who was the Orleanist claimant to the French throne with the title Henri VI.
As such, Robert would have the status of Petit- Fils de France with the style of Royal Highness.
His godparents were Viscount Paul de la Panouse and his paternal aunt Princess Claude of Orléans.
James I, Count of La Marche
James I of Bourbon (1319 – 6 April 1362), was the son of Louis I, Duke of Bourbon and Mary of Avesnes.
He was Count of Ponthieu from 1351 to 1360, and Count of La Marche from 1341 to his death.
Hugh XI of Lusignan
Hugh XI de Lusignan, Hugh VI of La Marche or Hugh II of Angoulême( 1221 – April 6, 1250).
He succeeded his mother Isabelle of Angoulême, former queen of England, as Count of Angoulême in 1246.
He likewise succeeded his father Hugh X as Count of La Marche in 1249.
Hugh XI de Lusignan was the half- brother of King Henry III of England.
John I, Count of La Marche
John of Bourbon
(John I/VII, Count of La Marche and of Vendôme), (1344 – 11 June 1393, Vendôme) was the second son of James I, Count of La Marche and Jeanne of Châtillon.
James II, Count of La Marche
James II of Bourbon- La Marche( 1370 – 1438 in Besançon) was the first son of John I, Count of La Marche and Catherine of Vendôme.

Question: Who is the paternal grandfather of John I, Count Of La Marche?
Answer: Louis I