I love
Maia, probably because of the little
German cartoon bee but also because the Mayan civilisation, though fascinating in its own way, isn't one I'd like to commemorate. And
Maya looks as if people might pronounce it like
May, the month, with an -a tacked on. Which is perilously close to 'mare' if, like me, you don't pronounce the -r!
I wouldn't touch
Gaia with a lump of mud, regardless of spelling.