Saint Mercurius – Mercurius (Greek: Ἅγιος Μερκούριος, Coptic: Ⲫⲓⲗⲟⲡⲁⲧⲏⲣ Ⲙⲉⲣⲕⲟⲩⲣⲓⲟⲥ; d. 250 AD) was a Greek soldier, who became a Christian saint and martyr.[2][3] He was born in the city of Eskentos in Cappadocia, in Eastern Asia Minor (modern-day Turkey).

St. Mercurius was born around 225 A.D. in Cappadocia (Eastern Asia Minor). His parents were converts to Christianity and they called him “Philopater” or “Philopatyr” (a Greek name which means ‘Lover of the Father’). They reared him in a Christian manner. When he grew to adulthood (at the age of 17), 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. They called him Mercurius and he grew very close to the Emperor.[citation needed] Saint Mercurius is known in Arabic by the name Abu-Seifein (أبو سيفين), which means “the holder [literally, owns/possess] of two swords,” referring to a second sword given to him, by the Archangel Michael. He was given this name by the Berbers who fought against him.[citation needed]

St. Philopater Mercurius is also said to be the cousin of St. George of Cappadocia.

Saint Mercurius – Wikipedia

https://en.wikipedia.org/wiki/Saint_Mercurius

Mercurius (Greek: Ἅγιος Μερκούριος, Coptic: Ⲫⲓⲗⲟⲡⲁⲧⲏⲣ Ⲙⲉⲣⲕⲟⲩⲣⲓⲟⲥ; d. 250 AD) was a Greek soldier, who became a Christian saint and martyr.[2][3] He was born in the city of Eskentos in Cappadocia, in Eastern Asia Minor (modern-day Turkey).