"Pedigrees of Some of The Emperor Charlemagne's Descendants, Volume I, II" @ 2:202
The cited information was published by (Baltimore:MD, Genealogical Publishing Co., 1974 repr. 1996) GPC #3285, #4835 (Ref: 2:202) The author/originator was compiled by Aileen Lewers Langston, J. Orton Buck, Jr., Marcellus Donald Alexander R. von Redlich.