Heiric of Auxerre
Heiric of Auxerre( 841–876) was a French Benedictine theologian and writer.
He was an oblate of the monastery of St. Germanus of Auxerre from a young age.
He studied with Servatus Lupus and Haymo of Auxerre.
His own students included Remigius of Auxerre and Hucbald.
His" Miracula sancti Germani" was a verse life of St. Germanus.
Other works include his" Collectaeum", a homiliary, and glosses on the" Categoriae decem".
Mamertinus of Auxerre
Saint Mamertinus of Auxerre( d.~ 462 AD) was a monk and abbot.
He was converted by Germanus of Auxerre and became a monk at the Abbey of Saints Cosmas and Damian, Auxerre( later rededicated to Saint Marianus of Auxerre).
He later served as its abbot.
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.
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.
Adelaide, Countess of Auxerre
Adelaide of Auxerre( 1251–1290) was ruling Countess of Auxerre in 1262- 1290.
She was a daughter of Eudes of Burgundy and Mathildis II of Bourbon.
In 1262 she succeeded her mother as Countess of Auxerre.
In 1268 she married John I of Chalon, Lord of Rochefort, son of John – they had one child, William( died 1304).
John III, Count of Auxerre
Jean of Châlon, Count of Auxerre was a French nobleman and soldier who fought in the Hundred Years' War, and was the son of Jean II of Châlon.
He was Count of Auxerre from 1361 to 1370.
In 1364, the Count fought alongside Bertrand du Guesclin at the battles of Cocherel and the Auray, where he was captured while commanding the left battle.
Abbo of Auxerre
Abbo of Auxerre was a Benedictine abbot and bishop of Auxerre.
He had been a monk, and later abbot, of the Abbey of Saint- Germain d' Auxerre, and succeeded his brother Heribald of Auxerre as bishop of Auxerre.
He resigned from the see in 859.
He assisted in the synod of Poncy in 860, and died on 3 December that year.
He is not listed in the Roman Martyrology, the official but incomplete list of saints recognized by the Roman Catholic Church.
His biography is included in" Les Petits Bollandistes".
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.
John I, Count of Holstein-Kiel
John I, Count of Holstein- Kiel( – 20 April 1263) was a member of the House of Schauenburg.
He was Count of Holstein- Kiel from 1261 until his death.
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.

Question: What nationality is John I, Count Of Auxerre's father?
Answer: French