Ermya Timothaus Makdisi was a Chaldean bishop, researcher, translator and author from the town of Al-Koush in Mosul, Iraq. He received his education in Iraq’s Christian schools and went on to pursue his higher education at Mar Youhanna Al-Habib (Saint John) Institute. In addition to teaching philosophy and canonical teachings in Rome, he also served as a bishop for Zakhour and its districts. He printed several grammar and linguistic books in the Chaldean language, including The grammar of the Chaldean Language and The grammar of the Aramic Language, as well as other theology books such as The literary theology.