At least two according to Memory Beta (wiki for licensed Star Trek materials). Geoffrey and the other is Jabilo. https://memory-beta.fandom.com/wiki/Joseph_M%27Benga
I‘m reading The IDIC Epidemic by Jean Lorrah and on p. 22 we hear about one Dr. Geoffrey M‘Benga. How many (inofficial) names did this man have before we (officially) settled on Joseph? 🤔 #StarTrek #DrM‘Benga #TrekLit (📎1)
@fredc@mastodon.online Ahhh, thanks for looking it up!