What is "barbalissos"

Barbalissos ( Latinized as Barbalissus) was a city in the Roman province of Euphratensis. Its site is marked by the ruins at Qala'at Balis, which partly retains the old name, south of Maskanah (the ancient Emar), in modern Syria, on the road from Aleppo to the site of Sura, where the Euphrates turns suddenly to the east.