The Aramaic word for "God" in the language of Assyrian Christians is ʼĔlāhā, or Alaha. Arabic-speakers of all Abrahamic faiths, including Christians and Jews, use the word "Allah" to mean "God". The Christian Arabs of today have no other word for "God" than "Allah". (Even the Arabic-descended Maltese language ofMalta, whose population is almost entirely Roman Catholic, uses Alla for "God".) Arab Christians for example use terms Allāh al-ab (الله الأب) meaning God the Father, Allāh al-ibn (الله الابن) mean God the Son, and Allāh al-rūḥ al-quds (الله الروح القدس) meaning God the Holy Spirit. (See God in Christianity for the Christian concept of God.)
Arab Christians have used two forms of invocations that were affixed to the beginning of their written works. They adopted the Muslim bismillāh, and also created their own Trinitized bismillāh as early as the 8th century CE. The Muslim bismillāh reads: "In the name of God, the Compassionate, the Merciful." The Trinitizedbismillāh reads: "In the name of Father and the Son and the Holy Spirit, One God." The Syriac, Latin and Greek invocations do not have the words "One God" at the end. This addition was made to emphasize the monotheistic aspect of Trinitian belief and also to make it more palatable to Muslims.
According to Marshall Hodgson, it seems that in the pre-Islamic times, some Arab Christians made pilgrimage to the Ka‘bah, a pagan temple at that time, honoring Allah there as God the Creator.
Some archaeological excavation quests have led to the discovery of ancient Pre-Islamic inscriptions and tombs made by Arabic-speaking Christians in the ruins of a church at Umm el-Jimal in Northern Jordan, which contained references to Allah as the proper name of God, and some of the graves contained names such as "Abd Allah" which means "the servant/slave of Allah".
The name Allah can be found countless times in the reports and the lists of names of Christian martyrs in South Arabia, as reported by antique Syriac documents of the names of those martyrs from the era of the Himyarite & Aksumite kingdoms.
A Christian leader named Abd Allah ibn Abu Bakr ibn Muhammad was martyred in Najran in 523 AD, and he had worn a ring that said "Allah is my lord".
In an inscription of Christian martyrion dated back to 512 AD, references to Allah can be found in both Arabic and Aramaic, which called him "Allah" and "Alaha", and the inscription starts with the statement "By the Help of Allah".
In Pre-Islamic Gospels, the name used for God was "Allah", as evidenced by some discovered Arabic versions of the New Testamentt written by Arab Christians during the Pre-Islamic era in Northern and Southern Arabia.
Pre-Islamic Arab Christians have been reported to have raised the battle cry "Ya La Ibad Allah" (O slaves of Allah) to invoke each other into battle.
"Allah" was also mentioned in pre-Islamic Christian poems by some Ghassanid and Tanukhid poets in Syria and Northern Arabia.
- Thomas E. Burman, Religious Polemic and the Intellectual History of the Mozarabs, Brill, 1994, p. 103
- Marshall G. S. Hodgson, The Venture of Islam: Conscience and History in a World Civilization, University of Chicago Press, p. 156
- James Bellamy, ‘Two Pre-Islamic Arabic Inscriptions Revised: Jabal Ramm and Umm al-Jimal’, Journal of the American Oriental Society, 108/3 (1988)
- Enno Littmann, Arabic Inscriptions (Leiden, 1949)
- Rick Brown, International Journal of Frontier Missions, (23:2 Summer 2006), page 80.
- Ignatius Ya`qub III, The Arab Himyarite Martyrs in the Syriac Documents (1966), Pages: 9-65-66-89
- Rick Brown, Who was ‘Allah’ before Islam? (2007), page 8.
- Alfred Guillaume& Muhammad Ibn Ishaq, (2002 ). The Life of Muhammad: A Translation of Isḥāq’s Sīrat Rasūl Allāh with Introduction and Notes. Karachi and New York: Oxford University Press, page 18.
- Adolf Grohmann, Arabische Paläographie II: Das Schriftwesen und die Lapidarschrift (1971), Wien: Hermann Böhlaus Nochfolger, Page: 6-8
- Beatrice Gruendler, The Development of the Arabic Scripts: From the Nabatean Era to the First Islamic Century according to Dated Texts (1993), Atlanta: Scholars Press, Page:
- Frederick Winnett V, Allah before Islam-The Moslem World (1938), Pages: 239–248
- Michael Macdonald, Personal Names in the Nabataean Realm-Journal Of Semitic Studies (1999), Page: 271
- Irfan Shahîd, Byzantium and the Arabs in the Fourth Century, Dumbarton Oaks Trustees for Harvard University-Washington DC, page 418.
- Irfan Shahîd, Byzantium and the Arabs in the Fourth Century, Dumbarton Oaks Trustees for Harvard University-Washington DC, Page: 452
- A. Amin & A. Harun, Sharh Diwan Al-Hamasa (Cairo, 1951), Vol. 1, Pages: 478-480
- Al-Marzubani, Mu'jam Ash-Shu'araa, Page: 302