User blog comment:Cottonmouth255/Weapon Name Origins in MH3U/@comment-1685631-20130530224443

Cigil and Cymmetry are just Sigil and Symmetry given C's to match Cera, given that Cera reads phonetically as "Sera". So if you read it phonetically it's just Sera Symmetry, etc.

Not sure on Cera though. Apparently it means wax.