yes, even from ML a lot is missing:
-Guy I d'Auvergne, comte d'Auvergne
-https://fr.wikipedia.org/wiki/Guy_Ier_d%27Auvergne
-https://fmg.ac/Projects/MedLands/AUVERGNE.htm#GuyAuvergnedied989A
*i) ROBERT [II]
**(a) ROBERT [III] (-[969/80]).
**(b) GUY [I] (-[989]). <---
**(c) BERTRAND (-after [980/85]).
*** (1)(2)(3).. . . . .
**(d) GUILLAUME .
*ii) ETIENNE (-[969/70]).
*iii) EUSTORGE [V]
working on the knot,
there are some very old unsourced MPs that don't quite match
*Arnaud I d'Auvergne, seigneur of Auvergne
**...= Eldearde de Mercoeur
let's see if the admin (C) is notified and helps identify traces / sources