Bousbach has historically been attested as Buezbach in 1429 and Buschbach in 1525. Bousbach and its German counterpart are Germanic in origin, deriving from a High German dialect, ultimately from Proto-West-Germanic *busk. The Germanic hydronym *-bak(i) entered the French language via High German, and took on two forms: the Germanic form -bach and Romantic -bais.[3]