The title of this fine gentleman with the majestic earlobes is "The Grand Nagus" (note the spelling):
Until recently, I always assumed his title was "The Grand Negus", in order to match the English spelling and human definition of Negus:
Wikipedia: Negus - Negus is a royal title in the Ethiopian Semitic languages. It denotes a monarch such as the Bahri Negus of the Medri Bahri in pre-1890 Eritrea and the Negus in pre-1974 Ethiopia. The title has subsequently been used to translate the words "king" or "emperor" in Biblical and other literature.
Is there a reason for this difference in spelling, or is the similarity to the word to Negus just a coincidence?