Goes further than that. They're named after the two legend leads as well: Orihime and Hikoboshi.
Also Hikoichi's last name, Hoshino means "of the stars". The legend is represented by the constellations Vega and Altair.
Interesting, those living armor types in the encyclopedia entry seem to match up with Dungeon Meshi team's speculations of what's controlling the armor.
Maybe this?
https://mangadex.org/title/040304b8-6442-482e-a621-f33b13248908/an-incompetent-woman-wants-to-be-a-villainess-the-young-lady-who-married-as-a-substitute-for-her
Same premise that an innocent girl is acting as a villainess
So this might be a bit late, but Kefeid's name probably should be Cepheid, since the heroes has star-themed names.
https://en.wikipedia.org/wiki/Cepheid_variable