Some scholars postulate that in pre-Islamic Arabia, including in Mecca, Allah was considered to be a deity, possibly a creator deity or a supreme deity in a polytheistic pantheon.^[21][22] The word Allah (from the Arabic al-ilah meaning "the god")^[23] may have been used as a title rather than a name.^[24][25][26] The concept of Allah may have been vague in the Meccan religion.^[27] According to Islamic sources, Meccans and their neighbors believed that the goddesses Al-lāt, Al-‘Uzzá, and Manāt were the daughters of Allah.^{[2][22][24][25][28]}

Regional variants of the word Allah occur in both pagan and Christian pre-Islamic inscriptions.^[29][30] References to Allah are found in the poetry of the pre-Islamic Arab poet Zuhayr bin Abi Sulma, who lived a generation before Muhammad, as well as pre-Islamic personal names.^[31] Muhammad's father's name was ʿAbd-Allāh, meaning "the servant of Allah".^[27]

Charles Russell Coulter and Patricia Turner considered that Allah's name may be derived from a pre-Islamic god called Ailiah and is similar to El, Il, Ilah and Jehova. They also considered some of his characteristics to be seemingly based on lunar deities like Almaqah, Kahl, Shaker, Wadd and Warakh.^[32] Alfred Guillaume states that the connection between Ilah that came to form Allah and ancient Babylonian Il or El of ancient Israel is not clear. Wellhausen states that Allah was known from Jewish and Christian sources and was known to pagan Arabs as the supreme god.^[33] Winfried Corduan doubts the theory of Allah of Islam being linked to a moon god, stating that the term Allah functions as a generic term, like the term El-Elyon used as a title for the god Sin.^[34]

South Arabian inscriptions from the fourth century AD refer to a god called Rahman ("The Merciful One") who had a monotheistic cult and was referred to as the "Lord of heaven and Earth".^[22] Aaron W. Hughes states that scholars are unsure whether he developed from the earlier polytheistic systems or developed due to the increasing significance of the Christian and Jewish communities, and that it is difficult to establish whether Allah was linked to Rahmanan.^[22] Maxime Rodinson, however, considers one of Allah's names "Ar-Rahman" to have been used in the form of Rahmanan earlier.^[35]