It would violate my NDA to say anything more than: yes, all of the software I've helped develop use the name of mythical creatures during development

Don't know much mythology. Do Thunderbird and Firefox count?

Edit. Just realized those aren't version codenames.

A company I worked for a decade ago used Greek and Norse gods to name our servers. There was Odin and Thor, Zeus and Dionysius, etc. Having been a huge fan of Stargate SG-1, I kept suggesting various Goa'uld names, and one made it through - Chronos.

That's as close to mythology as I got.

Closest I can get is my server is hosted with a company called Mythic Beasts, who use mythological beast names for their hardware.

I prefer version numbers. If you want to give it a nickname too, that's fine, but having to remember what order mythical names were released in just to track versions is super annoying.

Lansweeper uses Belgian beers. Not quite mythological but I think that's pretty funny.

elementary OS

Yeah I think everything that I'm aware of uses version numbers, not that the numbers always necessarily make much sense either

Trisquel GNU/Linux

All releases are named after Celtic goddesses/gods from Wales, Ireland, Gaul etc.