Don't forget that Josh is very well versed linguistically, especially in the tongues of the British Isles.
And so was of course Tolkien, as you all know. He, too, had a Carrock in his books, but there it was
a stony eyot in the upper reaches of the River Anduin, to the north of the Old Ford a few miles west of Beorn's farmstead.
During their journey to the Lonely Mountain (Erebor), Thorin and Company were housed there overnight by the Eagles before they went to see Beorn.
Gandalf states that the steps from the base of the rock to the flat top were made by Beorn and that "Carrock" is Beorn's name for it.
"Carrock" is somewhat of a linguistic joke on Tolkien's part; in Anglo-Saxon carr means "rock" and in Welsh, carreg also means "rock, stone". So, basically, Josh's Caroc most likely means stone-stone, that is, something super-duper-tough!!
Devil certainly increases the possibility of a godlike, but I'm not so sure it's a death godlike, but rather a nature/stone/earth-elemental godlike.