“For us, Allah … is a word used in Arabic to indicate the Creator who’s made the world we are living in. So when we say Allah in our prayers we mean the Creator of this world. In our prayer and pleas, in our Orthodox Christian religious ceremonies, we use exactly this word. We say, glory be to Allah in all times. We say Allah a lot during our liturgy…. We the Arab Christians say Allah in our Arabic language as a way to identify and address the Creator in our prayers.”
HE Archbishop Theodosios Atallah Hanna, in an interview with Nadezhda Kevorkova, quoted by Thoughts Theological (thoughtstheological.com), December 30, 2015.