Adalhard was the cousin of Charlemagne, and given the immense nature of the project, it is likely that the creation of the Liber glossarum enjoyed support from Carolingian rulers, including Charlemagne himself.
Adalhard je bio rođak Karla Velikog i, s obzirom na ogromnu prirodu projekta, verovatno je stvaranje Liber glossaruma uživalo podršku karolinških vladara, uključujući i Karla Velikog.