The names are definitely last quarter 12th Century and probably first quarter 13th Century, since they are for the most part the names of mature persons fighting in the Crusade in the South of current France.
The links below lead to lists of French names, the corresponding Occitan names, and the first page of the above text citing the name. These were taken from the book's index. The frequency of separate persons cited with the same name may indicate the popularity of the name. Bear in mind that the names are those of the participants and persons otherwise involved in the affairs of the Albigensian crusade. People involved were from Rome, Normandy, Germany, Aragon, and more. Please note that the French spellings in these lists are modern French forms. Only the Occitan spellings are from the original text.
A B CD EF G HIJK L MNOPQ R STUVWXYZ
Completed by Ramons lo Montalbes, September 1997
Clarifications added by Arval Benicoeur, June 1999
Published by Arval Benicoeur.