Elijah III Abu Halim
Elijah III Abu Halim (d. 12 April 1190) was the Nestorian Catholicos. He was first bishop of Maipherqat, then metropolitan of Nisibis, and finally Catholicos.
He wrote in both Arabic and Syriac. The latter was used for his collection of prayers for the Morning Office throughout the liturgical year. Manuscripts containing these are simply called 'Abu Halim'.
1. S. Brock, A brief outline of Syriac Literature (1997), p. 73.