Note 107
From Chapter 49 of the Decline & Fall

On a charter granted to the monastery of Alaon (A.D. 845) by Charles the Bald, which deduces this royal pedigree. I doubt whether some subsequent links of the ixth and xth centuries are equally firm; yet the whole is approved and defended by M. Gaillard, (tom. ii. p.60 - 81, 203 - 206,) who affirms that the family of Montesquiou (not of the President de Montesquieu) is descended, in the female line, from Clotaire and Clovis - an innocent pretension!