Brebis des Pyrénées cheese is a generic term for a group of cheeses.
It means “sheep’s milk cheese from the Pyrénées”, which are mountains in southern France on the border with Spain.
Brebis means “female sheep” (aka “ewe” in English.)
See also: Brebis au piment d’Espelette, Brebis de l’Abbaye de Belloc