I also thought of
Amber
Ruby
Emerald
Beryl
and, the name of a lovely little old lady I knew once - Bunny!
Going back to the point about thinking whether it would sound OK for a Professor or Prime Minister - Professor Bluebell Smith - do you think that, one day last century, a certain Mrs Obama sais to her husband "I'm thinking of calling him Barack. Does Barack Obama, President of the United States sound OK'?" Bet her husband would've said "Nah, but I like that name, we'll call him that anyway"