Mauritania different from Mauretania
Etymology
Mauritania takes its name from the ancient Berber kingdom that flourished beginning in the third century BC and later became the Roman province of Mauretania, which flourished into the seventh century AD. The two territories do not overlap, though; historical Mauretania was considerably further north than modern Mauritania, as it was spread out along the entire western half of the Mediterranean coast of Africa.
The term "Mauretania", in turn, derives from the Greek and Roman exonym for the Berber peoples of the region, the Mauri people. The word "Mauri" is also the root of the name for the Moors.
not same as not identical to distinct from separate from unlike