Not sure if MK had ever read of this when coming up with the name of Lorkhan (who can also be said to be "hollow" in having his heart removed, but that's a stretch). It got me thinking of the concept of the Dreamtime, when the ancestors of mortals and the animals were protean. For example, this quote reminds me of Nirn:
" Aboriginals believe in two forms of time; two parallel streams of activity. One is the daily objective activity, the other is an infinite spiritual cycle called the "Dreaming", more real than reality itself. Whatever happens in the dreamtime establishes the values, symbols, and laws of Aboriginal society. It was believed that some people of unusual spiritual powers had contact with the dreamtime."
And this quote: "One of the beliefs was that before animals and humans and plants were created, there were souls and they knew that they would become physical,but not know when. They then knew the time was right and they all one by one all said "we will do our very best to try to help the one that takes care of us all." Then they all became animals and the plants. Then the last soul became the human."
http://en.wikipedia.org/wiki/Dreamtime
Anyway, I wonder if MK was influenced by aboriginal beliefs. Seems possible when we know he's interested in various world mythologies.