Gothmog?

[Keeper of Dol Guldur]

Does anyone ever wonder, just who the Lieutenent of Morgul who took over the legions of the WitchKing was. He called himself Gothmog, but could have been an orc, or one of the more powerful Nazgul, but given the argument about Balrog incarnation recently reopened in "Seven Thains of Morgoth", I myself might now be inclined to think of "Gothmog" as an orc with the spirit of the original incarnated in him. What other of evil orient would dare use the name of the greatest dark warrior ever to exist? Or would Sauron let someone as weak and miserable as an orc deface the name of one of his former comrades? Unless the spirit was him, because even if it was a Nazgul, because the WitchKing had four Morgul lieutenents, could they even utilize that name without repurcution? So that leaves noone. Unless at that moment, someone changed their name to instill more fear unto the enemy, which though likely, seems to give the orcs a great deal less respect for their masters, or the nazgul a great deal more pretentiousness. If anyone thinks they might know, do tell. But the nazgul were flying around at the time, so could it have been one of them?