On several occasions the South Tyrolean bishop Arbeo of Freising († 783 or 784) or the Benedictine monk Kero are named as authors.
This Latin-Latin glossary, the Latin Abrogans, was probably compiled in Italy (possibly in the important southern Italian monastery Vivarium) of numerous older late-antiquity and early medieval glossaries.
Thus arose a dictionary in which rare expressions, above all from biblical Latin, were explained.
Nevertheless, the Abrogans offers tremendous material for linguistics, which still today is not yet completely analyzed.
The best, albeit mangled handwriting is the direct copy of the archetype that was made around 810 in Murbach for Charlemagne (Baesecke) or in Regensburg under Bishop Baturich (Bernhard Bischoff).