Where does “Mari” come from?

Mari (Icelandic) comes from Old French More, from Latin Maurus, from Ancient Greek Μαυρούσιος, from Ancient Greek -ούσιος, from Ancient Greek -ῐος, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Mari (Icelandic): Moor (member of an ancient Berber people, Islamic people who ruled Spain, etc.)

Definitions

Moor (member of an ancient Berber people, Islamic people who ruled Spain, etc.)

Ancestry of “Mari”, step by step

Step	Language	Word	Meaning
1	Old French	More	—
2	Latin	Maurus	Of or pertaining to the Moors; Moorish,...
3	Ancient Greek	Μαυρούσιος	an inhabitant of Mauretania; a Mauretanian
4	Ancient Greek	-ούσιος	forms relational adjectives: of or pertaining to
5	Ancient Greek	-ῐος	belonging to; of”, “belonging to”, “pertaining to
6	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →Every word from Ancient Greek -ῐος →Every word from Ancient Greek -ούσιος →