I've also fostered5 cats at once
their names were all after music genres, so we change them to:
tigs ( named after my step mom's passed away cat)
Disco( we kept it as it was)
mellow ( again, we kept it as it was, but we ended up adopting mellow)
ears ( we thought it fit , because he had black spots around his ears)
last but not least, jazz (was the mom of all of them, and we kept her name as it was)