"Hugh (abbot of Saint-Quentin)" his Wikipedia page is here (as I have already pointed out )
https://en.wikipedia.org/wiki/Hugh_(abbot_of_Saint-Quentin).... Hugh (802–844) was the illegitimate son of Charlemagne and his concubine Regina
Hugh (abbot of Saint-Quentin)
From Wikipedia, the free encyclopedia
Hugh (802–844) was the illegitimate son of Charlemagne and his concubine Regina, with whom he had one other son: Bishop Drogo of Metz (801–855). Along with Drogo and his illegitimate half-brother Theodoric, Hugh was tonsured and sent from the palace of Aachen to a monastery in 818 by his father's successor, Louis the Pious, following the revolt of King Bernard of Italy.[1] Hugh rose to become abbot of several abbacies: Saint-Quentin (822/3), Lobbes (836), and Saint-Bertin (836). In 834,[1] he was made imperial archchancellor by his half-brother.[2]
On Louis's death in 840, his sons began to fight over the inheritance. In 841, Hugh sided with his nephew Charles the Bald against Louis and Lothair.[3] In 842, Charles spent Christmas with Hugh at Saint-Quentin on his eastern frontier.[4] Hugh's interventions probably secured Saint-Quentin for Charles's kingdom in the division that came with the Treaty of Verdun (843).[5]
Hugh was part of the small army which, on its way south to join Charles at Toulouse, was ambushed by Pippin II in the Angoumois on 14 June 844. Hugh was killed by a lance, and according to the anonymous verse lament composed about his death—called the Rhythmus de obitu Hugonis abbatis or Planctus Ugoni abbatis[6]—Charles wept over his body.[7][8]
Hugh is sometimes confused with Hugh the Abbot, resulting in the erroneous claim that he had a daughter, Petronilla, who married Tertullus of Anjou, the semi-legendary father of Ingelger, first count of Anjou. The late accounts of the Angevin origins actually make Petronilla a kinswoman of Hugh the Abbot, not of Charlemagne's son.
Sources
MacLean, Simon. Kingship and Politics in the Late Ninth Century: Charles the Fat and the end of the Carolingian Empire. Cambridge University Press: 2003.
there are two "Hugh the Abbot"
Hugh the Abbot
From Wikipedia, the free encyclopedia
Not to be confused with Hugh (abbot of Saint-Quentin).
Hugh the Abbot (died 12 May 886) was a member of the Welf family, a son of Conrad I of Auxerre and Adelaide. After his father's death, his mother apparently married Robert the Strong, the margrave of Neustria. On Robert's death in 866, Hugh became the regent and guardian for Robert's sons, Odo and Robert.
Hugh entered the monastery and rose to become abbot of Saint-Germain d'Auxerre. Despite his vows, he was no peaceful, contemplative monk but the epitome of the warrior-monk of his age. King Charles the Bald sent him on a military expedition to the Nivernais. One can see in this the clerical tendency to support the reigning dynasty against the great vassals. Hugh welcomed Charles when the king had to flee during an 858 invasion of Louis the German, when his vassals refused him aid and rebelled under Robert the Strong. When Robert regained favour, Hugh was exiled to Lotharingia, where he became archbishop of Cologne (864). He was called back to France soon, however.
In 866, upon Robert's death, Hugh received all the former's abbacies, including Noirmoutiers and Saint-Martin de Tours, counties, including Tours, and the margraviate between the Seine and the Loire (Neustria). The only lands the sons of Robert inherited were in Beauce and Touraine. Despite being Robert's during his life, after his death Hugh became the guardian of Robert's children. Hugh was endued with great political sense and fought the Vikings vigorously. He was the archchaplain of the royal court and one of the chief ministers of the joint-kings Louis III and Carloman. Hugh tried to maintain the alliance of the related Carolingian monarchs against the Vikings. He united all the Carolingian kingdoms against the usurper Boso of Provence. He supported Charles the Fat on his succession to West Francia in 884, but he died before he could lend aid to the defence of Paris during the siege of 885–86.
this is what I have on my Ancestry tree
Petronilla of Auxerre-Hughes
840–845
BIRTH 0840 • Rheinland-Pfalz, Germany
DEATH 0845 • Angers, Departement de Maine-et-Loire, Pays de la Loire, France
If you read both wiki links carefully it clearly states
"Hugh the abbot" was "abbot of Saint-Germain d'Auxerre"
were as the other Hugh the abbot
"Hugh (abbot of Saint-Quentin)" was just that "abbot of Saint-Quentin" and not abbot of abbot of " Saint-Germain d'Auxerre" So I cant see how Hugh the abbot of Saint Quentin can be Petronilla of Auxerre father. The other Hugh has to be her father. They both have the last name "of Auxerre"