There is debate on his religious affinity: while Theodor Nöldeke noted that Imru al-Qays ibn 'Amr was not a Christian[1] Irfan Shahid argued for a possible Christian affiliation, noting that Imru al-Qays' Christianity may have been "orthodox, heretical or of the Manichaean type".
[2] Furthermore Shahid asserts that the Namara inscription which mentions Imru al-Qays ibn Amr lacks Christian formulas and symbols.
[3] Al-Tabari states that "he ruled for the Persians in all the land of the Arabs in Iraq, Hejaz and Mesopotamia".
The same inscription mentions that Imru al-Qays reached as far as Najran and besieged it from the king, Shammar Yahri'sh.
have identified "Imru al-Qays ibn Amr" in some South Arabian inscriptions with that one.