Where does “Maurītānia” come from?

Maurītānia (Latin) comes from Latin Mauritanus, from Latin maurus, from French maure, from Middle French moré, from Old French More, from Latin Maurus, from Ancient Greek Μαυρούσιος, from Ancient Greek -ούσιος — Creates adjectives from noun or verb stems.

Ancestry of “Maurītānia”, step by step

Step	Language	Word	Meaning
1	Latin	Mauritanus	Mauritanian, of the Moors
2	Latin	maurus	Moorish, North African
3	French	maure	Moorish
4	Middle French	moré	Moor (person of Berber descent)
5	Old French	More	—
6	Latin	Maurus	Of or pertaining to the Moors; Moorish,...
7	Ancient Greek	Μαυρούσιος	an inhabitant of Mauretania; a Mauretanian
8	Ancient Greek	-ούσιος	forms relational adjectives: of or pertaining to
9	Ancient Greek	-ῐος	belonging to; of”, “belonging to”, “pertaining to
10	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Words derived from “Maurītānia”

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