No, Petiet's memoirs are the original source for both names: Bonnet and Boucher.
In the 1844 edition, it is Boucher:
https://books.google.de/books?id=6hsbAAAAYAAJ&pg=PA216&dq=boucher
In the 1996 edition, it is Bonnet:
Probably Andrew Field, Waterloo: The French Perspective, used this 1996 edition as his source:
https://books.google.de/books?id=WI5WDAAAQBAJ&pg=PT74
Whether the 1996 Bonnet is a misreading of the 1844 Boucher, or perhaps a better reading of the original manuscript, I can't tell, as I don't have access to the 1996 edition of Petiet's memoirs.