Proper noun
A diminutive of the male given name Marcus, from Latin or Ancient Greek, variant of Marc or Mark, equivalent to Koine Greek Μᾱρκίων (Mārkíōn) or Latin Mārciōn
(Christianity, Gnosticism, philosophy, history) Marcion of Sinope, 2nd century AD theologian, philosopher, preacher and founder of Marcionism, a Hellenistic Christian religious belief system influenced by Gnostic theology; compiled the first Biblical canon, consisting solely of Greek New Testament scriptures, totally rejecting the scriptural authority of the Hebrew Tanakh adopted as the canonical Old Testament of the Christian Bible
Source: en.wiktionary.orgIn a strange way, Marcion understood the situation better than the more conventional followers of the church, for Lucifer is merely one of the faces of a larger force. Evil is a by-product, a component, of creation. Howard Bloom
Prior to Valentinus, those who follow Valentinus had no existence. Nor did those from Marcion exist before Marcion. Nor, in short, did any of those malignant-minded people, whom I have listed above, have any existence previous to the initiators and inventors of their perversity. Irenaeus
Against Heresies 3.11.8 Thus Irenaeus provides the earliest witness to the assertion of the four canonical Gospels, possibly in reaction to Marcion 's edited version of the Gospel of Luke, which Marcion asserted was the one and only true gospel. Source: Internet
In about 200 AD, Tertullian wrote (Against Marcion IV. 40): "Taking bread and distributing it to his disciples he made it his own body by saying, 'This is my body,' that is a 'figure of my body.' Source: Internet
One day he met in the streets of Rome the heretic Marcion who, resenting that Polycarp did not greet him, said: "Do you know me?" Source: Internet
Marcion is generally labeled a gnostic, however some scholars do not consider him to be a gnostic at all, for example G. R. S. Mead does consider him to be a Gnostic ". Source: Internet