Remember a few years back, I waded through the WCF and did a listing of proofs? It is no mistake that Muhammed's Allah bears a striking resemblence to Calvin's God. They use many similar proofs - Calvin relied largely on the OT with seemingly agreeing Pauline verse in order to construct something that Christianity up to that point had only seen from those opposing it. There is much speculation that Muhammed was at least initially influenced by the Bible and by Christians and Jews. The myriad references to the OT prophets and the naming of Jesus as the second greatest prophet are evidence.
Osiris, Kali, and the Keres live on...
In many shapes and forms.