Spanish and Portuguese form of Cosmas, from Greek kosmos meaning order or beauty; Saint Cosmas was one of the early Christian twin martyrs, patron of physicians and pharmacists.
Nicknames
cos
Vibe
strongwarm
How it ages.
Saint's name with medical patronage; quietly classical, never fashionable enough to date.
The cultural moment.
Traditional in Spain and Brazil for centuries; consistent but rare in new births.