Have you read this surname origin info?
https://surnames.behindthename.com/bb/sur/3349642
I've never seen that before, Kathy, thanks!
Of course, there was no internet when i was working on ships back in the 80's & 90's, so all i could do was check phone books in different European countries whenever we docked. I never found the name Genao in Spain or Portugal back then. Now, there are a few in Spain, but that's from Dominicans immigrating to Spain in the last 25yrs.