Marción

Marcion, a diminutive of the male given name Marcos, from Koine Greek, particularly (historical) Marcion of Sinope, founder of Marcionism

From Late Latin Mārciōn, from Koine Greek Μᾱρκῑ́ων (Mārkī́ōn, “Marky, little Mark, son of Mark”), from Ancient Greek Μᾶρκος (Mârkos) + -ίων (-íōn, “-son: forming patronymics”), from Latin Mārcus, from Mārs + -cus (“forming adjectives”), from Old Latin Māvors (“Mars, god of war”) and Proto-Indo-European *-kos (“forming desubstantival adjectives”).