[Opinions] Re: I just realized, that for the first time in decades...
Are Luna and Mia international? Mia, yes, as an adjective. I haven't noticed any Luna people in South Africa, though it's hard to say in the absence of statistics. Charlotte Bronte apologised for using Shirley, which she knew only as a ln and therefore sometimes as a male given name, for her heroine in the novel with that name, but surely it must have been used for girls after that, however seldom, otherwise Shirley Temple couldn't have been Shirley and sparked off the trend.
I'd be interested to know if names like Harper etc were first used (in the US) in media, advertising, that kind of thing; or was it just Zeitgeist?