(), a celebrated saint and martyr, who was a physician by profession and lived in the third and fourth centuries after Christ. He is said to have been the brother of St. Cosmas, with whose name and life his own is commonly associated, and whose joint history appears to have been as follows. They were born in Arabia: their father's name is not known, their mother's was Theodora, and both are said to have been Christians. After receiving an excellent education, they chose the medical profession, as being that in which they thought they could most benefit their fellow men; and accordingly they constantly practised it gratuitously, thus earning for themselves the title of