Maria of Loon-Heinsberg
Maria of Loon- Heinsberg( 1426 – 20 April 1502) was the daughter of John II of Loon, Lord of Jülich, Heinsberg and Löwenberg.
Her mother was the second wife of John II, Countess Margaret of Solms- Braunfels.
Maria died on 20 April 1502 as the last member of the house of Loon- Heinsberg and is buried with her husband in the mausoleum of Engelbert I of Nassau in the Church of Our Lady at the Market Square in Breda.
John I, Count of Looz
John I (Jean) (d. 1278 or 1279), Count of Looz and Count of Chiny, eldest son of Arnold IV, Count of Looz and Chiny, and Jeanne, Countess of Chiny.
He succeeded his father in 1272 or 1273, as the Count of Looz and Chiny.
Virtually nothing is known about his reign.
He first married, in 1258, Matilda, daughter of William IV, Count of Jülich, and Matilda of Gelderland.
Their children were:
Widowed, he married secondly, in 1269, Isabelle de Conde (d. after 1280), daughter of Jacques, Seigneur of Conde and Bailleul, and his wife Agnes of Rœulx.
Their children were::
Upon his death, he was succeeded as Count of Chiny by his brother Louis, and as Count of Looz by his son Arnold.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
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.
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.
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.
Diederik of Heinsberg, Count of Loon
Diederik of Heinsberg
( French:" Thierry", German:" Dietrich", English:" Theodoric")( died between 17 and 21 January 1361), Count of Loon( French:" Looz") and Count of Chiny( 1336- 1361), was the son of Godfrey II, Lord of Heinsberg( son of Diederik, Lord of Heinsberg, and Joanna of Leuven), and Matilda( daughter of Arnold V, Count of Loon and Chiny, and Marguerite Vianden).
In 1336, Diederik's uncle Louis IV, Count of Loon and Chiny, died without having had children, and a succession crises emerged.
An agreement of 1190 stipulated that if the House of Loon were extinguished, the county would then be integrated with the Principality of Liège.
The reaction of the Chapter of Saint- Lambert was immediate.
The Prince- Bishop of Liège Adolph of La Marck moved to incorporate the County of Loon into the principality, while Diederik maneuvered to assume the title of count.
However, since Diederik had married Adolph ’s sister and the bishop was fond of their son, family relations won out.
Until his death in 1344, the prelate used all of his influence to ensure that the county remained in possession of his brother- in- law.
But the death of the bishop did not terminate possession the Counties of Loon and Chiny by the Heinsbergs, because Adolph ’s nephew Engelbert III succeeded him as Prince- Bishop of Liège.
Engelbert removed the threat of excommunication pronounced against Diederik and allowed him to remain at the head of the counties until his death.
In 1336, Diederik married Kunigunde of the Mark,( d. 1343), daughter of Engelbert I, Count of the Mark, and Kunigonde of Blieskastel, sister of Adolph of the Marck and Eberhard II, Count of the Mark( also his uncle through marriage to Matilda ’s sister Marie).
Diederik and Kunigunde had one son: Upon his death in 1361, Diederik ’s nephew and heir, Godfrey of Heinsberg, Lord of Daelenbroeck, claimed the counties of Loon and Chiny, while the Prince- Bishopric of Liège claimed it as fief of the church.
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.
Joan, Countess of Chiny
Joan (c. 1205 – 17 January 1271) was the Countess of Chiny.
Joan was the daughter of Louis IV, Count of Chiny, and Matilda of Avesnes, and became ruler of the county upon her father’s death on 7 October 1226.
She married Arnold IV, Count of Loon, son of Gerard III, Count of Rieneck, and Kunigunde von Zimmern,
in 1228, whereupon he assumed the role of Count of Chiny.
Joan and Arnold had the following children:
She was succeeded as ruler of Chiny by her husband, Arnold II, Count of Chiny.
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.

Question: Who is John I, Count Of Looz's maternal grandfather?