Thanks. I actually came across the name in credits for a film. I had to replay them to see if it was for a man or a woman. It turned out to be an actress' name. That's why I asked.
It reminds me of the US
Marine motto, "semper fidelis." (= always faithful) But I really can see it on either gender.
I think I agree with Array.
Fidelis seems gender-neutral, and there aren't man of those that I like. I'm glad you like it too.