Joseph Barbatus was an Egyptian Copt who lived in early 17th century Paris, France, and taught Arabic there.He is also known as Josephus Barbatus, Abudacnus, which is a latinized version of the Arabic أبو دقن "Abu Dakn" (one with a beard).The fact that he is from Egypt, and a native speaker of Arabic, no doubt made him distinguished in teaching this language. Not only did he teach Arabic, but wrote on Hebrew as well. As a Copt, he also wrote a history of the Coptic church, a work that Edward Gibbons in his Decline and Fall of the Roman Empire is familiar with.His works include:
- Historia Jacobitarum or History of the Jacobites. This is a history of the Coptic Church.
- Lexicon Hebraica - a Hebrew Dictionary.
Among his students are the famous Dutch scholar, Thomas Van Erpe (Erpenius).