The manuscript of 1653 is evidently unpublished in full and belongs to
Richard Bavoillot. I assume this is his source for making the wife of
Loup Garsie II into a niece of Henry II named Adelaide, but I have not
seen his 1977 article so this is just a guess - I can't find any other
authority for such an implausible connection.
The only extract I have seen from Bavoillot's document is in vol. 6 of
*Corpus des inscriptions de la France médiévale* (1981) p. 88, an
epitaph supposedly placed on his tomb by "Loup-Garsie, comte d'Orthe,
seigneur de toute la province" and the abbot of Cagnotte in December
1189 for the (vis)count's paternal grandfather who had died in 1146. It
is a brazen puff for the deceased, maybe fitting a pattern for the
entire family: "Seule gît ici la dépouille du glorieux seigneur
Raimond-Sanche d'Orthe, qui trépassa le 2 des ides de décembre, en l'an
1146, après l'incarnation de Notre-Seigneur. Par ses multiples qualités,
il fut grand dans la vie terrestre, il soulagea les faibles, réaffermit
ceux qui étaient sans courage, abaissa les fourbes et les iniques, fut
un pilier du Temple de l'Eternel, protecteur et aimé de l'Eglise
universelle. Son âme est en la Jérusalem céleste. Ainsi soit-il un
exemple." Modest, not.
The only extant source for Loup Garsie's charter naming his wife as
Dalas is a 17th-century transcription here (no. 4):
https://gallica.bnf.fr/ark:/12148/btv1b8453972z/f18.item.r=12680
This follows a charter dated 1180 in which Loup Garsie mentions his
mother but not a wife. 'Dalas' perhaps may be a scribal oddity for the
name Adelais, but any link to the Angevin family must be drawn from
somewhere else. As I wrote before, Henry II's brother Guillaume had no
legitimate offspring and as far as I'm aware no illegitimate daughter.
Their half-brother Hamelin had several daughters, but all of them were
married to Anglo-Norman husbands. Loup Garsie joined a rebellion against
Richard I and supposedly in submitting after defeat asked him to become
god-father to his second son - this episode does not strike me as wholly
consistent with either prior or subsequent marriage to a first cousin of
Richard.
The series of wives from the Angevin, Montfort and Lusignan families are
all highly questionable, since such minor feudatories as the viscounts
of Orthe are hardly likely to have scored celebrated in-laws repeatedly,
if ever.
Peter Stewart