The name of Arnesons world

[Havard]

What is the name of the planet on which Blackmoor resides?

Perhaps there's a clue from Star Empires? or Andre Norton's Quag Keep?

I would be interested in finding out where John Snider placed Blackmoor. Dave Ritchie and Bruce Heard placed Blackmoor on the world Frank Mentzer named Urt, which later was named Mystara. It's solar system is described in the Gold Box Immortal Rules.

-Havard