Where does “Marcion” come from?

Marcion comes from Late Latin Marcion, from Koine Greek Μᾱρκῑ́ων, from Ancient Greek Μᾶρκος, from Latin Marcus, ultimately from Proto-Indo-European -kos.

Ancestry of “Marcion”, step by step

Step	Language	Word	Meaning
1	Late Latin	Marcion	—
2	Koine Greek	Μᾱρκῑ́ων	—
3	Ancient Greek	Μᾶρκος	—
4	Latin	Mārcus	—
5	Latin	Martīnus	—
6	Latin	-īnus	—
7	Proto-Italic	-īnos	of/belonging to
8	Proto-Indo-European	-iHnos	Creates adjectives of materials
9	Proto-Indo-European	-no-	adjectival suffix

Every word from Proto-Indo-European -no- →