The family site La Casata dei Lupi, (Italian language), contains photos of Lord and Lady Nicholas, their first son Albert, and members of the Lupis family. Retrieved 26 September 2009. As of 26 September 2009, this was the only source online that had the name of the second son as Leopold Ernest Augustus Guelph Windsor.
Doimi de Lupis genealogy (Italian language) hosted by Società Genealogica Italiana – SGI. Retrieved 26 September 2009.
