Charles "Martel" had one illegitimate son by Mistress (1):
7. BERNARD (before 732-787). The Genealogica Arnulfi Comitis names (in order) "Pipinum, Karlomannum, Griphonem et Bernardum" as sons of "Karolus senior…ex regina"[247]. Comte.
- CAROLINGIAN NOBILITY - FAMILIES of ADALHARD and WALA.
Charles "Martel" had two illegitimate sons by Mistress (2):
8. HIERONYMUS (-after [782]). The Genealogica Arnulfi Comitis names (in order) "Remigium et Geronimum" as sons of "Karolus senior…ex concubina"[248]. Comte. Abbé de Saint-Quentin.
- CAROLINGIAN NOBILITY - FAMILY of HIERONYMUS.
9. REMIGIUS (-787). The Genealogica Arnulfi Comitis names (in order) "Remigium et Geronimum" as sons of "Karolus senior…ex concubina"[249]. Bishop of Rouen 755-771. The Annales Moselleni record the death in 787 of "Remigius et Bernehardus"[250].
https://fmg.ac/Projects/MedLands/FRANKSMaiordomi.htm#_ftnref250