Mercurius (d. AD 250) was a Christian saint and a martyr. He was born in the city of Eskentos in Cappadocia, Turkey.
His parents were converts to Christianity and they called him “Philopater”. They reared him in a Christian manner. When he was17 he enlisted in the Roman army during the days of Emperor Decius, the pagan. He gained a great reputation among his superiors as a swordsman and a tactician in many battles.