English form of COSMAS. It was introduced to Britain in the 18th century by the second Scottish Duke of Gordon, who named his son and successor after his friend Cosimo III de' Medici.
From the Greek name Κοσμας (Kosmas), which was derived from κοσμος (kosmos) meaning "order, decency". Saint Cosmas was martyred with his twin brother Damian in the 4th century. They are the patron saints of physicians.