Katharina van Egmont, regent van Gelre

https://en.wikipedia.org/wiki/Catherine_of_Guelders

The fact that Katharina van Egmont was the mother of Loiuis de Bourbon's children is unconfirmed. The subject is discussed in Medlands.

Kerrebrouck discusses the claim that the mother of the children of Louis de Bourbon Bishop of Liège was Katharina van Egmont Regent of Geldern (1439-1496), first made in 1628 by the brothers Scévole and Louis de Saincte-Marthe, and embellished during the 18th century by the assertion of a secret marriage between the alleged couple.

Link

http://fmg.ac/Projects/MedLands/BOURBON.htm#_Toc207154613

Catherine of Guelders was the fourth and youngest child of Arnold, Duke of Guelders (1410-1473) and Catherine of Cleves (1417–1479).
Until 1477, she led an inconspicuous life, in the shadow of her brother Adolf, at war with his father, and her sisters Mary, married to King James II of Scotland and Margaret, married to Frederick I, Count Palatine of Simmern. Despite efforts by her father, no suitable husband was found for Catherine

17th century theories that she was secretly married with Louis de Bourbon, Bishop of Liège, are now believed to be FALSE.

https://en.wikipedia.org/wiki/Catherine_of_Guelders