From Hebrew Baʿal Zəbûb (בעל זבוב), 'lord of the flies', a Philistine deity in 2 Kings 1:2 reinterpreted in Christian demonology as a high-ranking demon. Often conflated with Satan but ranked beneath him in Milton's Paradise Lost. The mainland transliteration
别西卜 (Biéxībǔ) is more common;
比埃兹巴伯 is a longer phonetic variant.
