Stephen of Montfaucon
Stephen of Montfaucon( 1325 – 1 November 1397) was Lord of Montfaucon and Count of Montbéliard from 1367 until his death.
He was the son of Henry of Montfaucon and Agnes of Chalon.
He married Marguerite of Chalon- Arlay, daughter of John II of Chalon- Arlay, and they had three children:
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.
Claudia of Chalon
Claudia of Chalon- Orange( 1498 – May 31, 1521, Diest) was the second wife of Henry III of Nassau- Breda, whom she had married in 1515.
She was the mother of René of Chalon, lord of Breda, the first Nassau to be Prince of Orange.
Claudia of Chalon was the daughter of John of Chalon, lord of Arlay and Philiberte of Luxembourg- Ligny.
She was raised mainly at the French court.
She was buried in the Grote kerk(" big church") in Breda.
After the death of her brother Philibert of Chalon the title of Prince of Orange went to her son René of Châlon.
Stephen III of Auxonne
Stephen (or Étienne) III (died 1241) was count of Auxonne.
He was from the House of Ivrea, son of Stephen II, count of Auxonne (died after 1173) and Judith of Lorraine (c. 1140 – 1173).
He was Stephen III in his House and Stephen II as count of Auxonne.
His father Stephen II of Auxonne was son of William III, count of Mâcon and his wife Poncette/Alice, lady of Traves.
His mother Judith was daughter of Matthias I, Duke of Lorraine and Bertha Hohenstaufen (daughter of Frederick II, Duke of Swabia).
Stephen III married firstly (c.1186) to Beatrix, countess of Châlon (daughter of Guillaume, count of Chalon & Beatrix a daughter of Frederick Barbarossa, Holy Roman Emperor) but they divorced 1197/1200.
He married secondly (before 1212) to Agnes of Dreux (1195–1258), daughter of Robert II, Count of Dreux by his second wife Yolande de Coucy.
Stephen had issue only from his first marriage to Beatrix, countess of Châlon:
He had also an illegitimate child: Stephen (Etienne), baron d' Oiselet (1208 - after 1267).
Hugh, Count of Burgundy
Hugh of Chalon( 1220 – 1266) was count of Burgundy by his marriage to Adelaide, Countess of Burgundy, on 1 November 1236, when he was aged 16.
He was the son of John, Count of Chalon, and his first wife, Mahat, daughter of Hugh III, Duke of Burgundy.
He and Adelaide had the following children: Hugh III's wife remarried to Philip I, Count of Savoy a year after his death and she was succeeded as count by Otto, one of her children by Hugh.
Hugh of Chalon (bishop of Auxerre)
Hugh of Chalon (French: "Hugues de Chalon"; c. 975 – 4 November 1039) was a member of the House of Chalon.
He was a Bishop of Auxerre and a Count of Chalon.
He was the only son of Lambert of Chalon and his wife Adela (Adelais, Adelaide), and was made a canon of the Cathédrale Saint-Lazare d'Autun.
After his father's death, he was proclaimed Bishop of Auxerre in 999 by request of Henry I, Duke of Burgundy.
After the death of the latter, he abandoned Auxerre to defend his family county of Chalon in the war that ensued.
His successor was his maternal nephew, Count Theobald of Chalon, son of Hugh's sister Matilda (French: "Mathilde").
Hugh I of Chalon-Arlay
Hugh I of Chalon- Arlay( 1288–1322) was lord of Arlay and of Vitteaux, and belonged to the house of Chalon- Arlay.
He was the son of lord John I of Chalon- Arlay and his first wife Marguerite of Burgundy( daughter of duke Hugh IV of Burgundy), and his grandfather John, Count of Chalon was count- regent from the death of Otto III, count of Burgundy onwards.
On 13 February 1302 Hugh I married Béatrice de La Tour- du- Pin( 1275 – 1347)( daughter of count Humbert I of Viennois).
They had one child
Lambert of Chalon
Lambert of Chalon
( French:" Lambert de Chalon"; 930- 22 February 978) was the count of Chalon from 956 to 978, and count of Autun.
He was the son of Robert of Dijon and Ingeltrude, and the brother to Rudolf, viscount of Chalon.
Around 968, he married Adelaide of Chalon, the daughter of Gilbert, Duke of Burgundy and widow of Robert of Vermandois.
Their children included: Lambert died in 978, was interred at Paray- le- Monial, and was succeeded in Chalon by his son Hugh.
John I, Count of Auxerre
John I of Chalon- Auxerre( 1243– 1309) was a son of John, Count of Chalon and his second wife, Isabella van Courtenay- his brother was bishop Hugo III of Chalon.
John
I married Adelaide of Auxerre and they ruled jointly as Count of Auxerre.
John was the father of William of Chalon.
John, Count of Chalon
John (1190 – 30 September 1267), called the Old ("l'Antique"), was a French nobleman, the Count of Auxonne and Chalon-sur-Saône in his own right and regent in right of his son, Hugh III, Count of Burgundy.
In contemporary documents, he was sometimes called "Count of Burgundy", as by King William of Germany in 1251.
He was the son of Stephen III of Auxonne and Beatrice, Countess of Châlon.
On June 5, 1237, he exchanged his inherited patrimony of Auxonne and Chalon with Hugh IV, Duke of Burgundy for the following territories:
Salins
Although he gave charters to the towns in his territory, he also welcomed the Dominican friars as inquisitors.
The possession of Salins, with its salt production, gave John the fortune necessary to extend his territories.
To protect the trade routes, he built the following fortresses: Le Pin, Montmahoux, Saint-Anne, Arguel, and Nozeroy, where he normally resided.
To avoid the customs imposed by the Count of Pontarlier, he bought the forests in the region around Pontarlier and Jougne, which he logged, creating new roads.
He founded the towns of Châtelblanc, Chaux-Neuve, and Rochejean, the last of which contains his name.

Question: Who is the paternal grandfather of John, Count Of Chalon?
Answer: Stephen II of Auxonne