Belzebuli (kwa Kiingereza: Beelzebub au Beelzebul, kutoka Kiebrania בַּעַל זְבוּב, Baʿal Zəvûv) ni jina lililotokana na lile la mungu mmojawapo wa Wafilisti wa Ekron, ambalo tena linahusiana na Baal, mungu mkuu wa Kanaani. Baadaye lilitumiwa na Wayahudi, Wakristo na Waislamu kama jina la mmojawapo kati ya pepo wakuu zaidi, ila badala ya kumuita Beel Zebul, yaani Baal Mfalme, walitamka Baal Zebub, yaani mungu wa nzi. Kwa Kiarabu jina limekuwa Baʿlzabūl (بعلزبول). "Βεελζεβούλ, ὁ indecl. (v.l. Βεελζεβούβ and Βεεζεβούλ W-S. §5, 31, cp. 27 n. 56) Beelzebul, orig. a Philistine deity; the name בַּעַל זְבוּב means Baal (lord) of those who are capable of flying (4 Km 1:2, 6; Sym. transcribes βεελζεβούβ; Vulgate Beelzebub; TestSol freq. Βεελζεβούλ,-βουέλ).", Arndt, W., Danker, F. W., & Bauer, W. (2000). A Greek-English lexicon of the New Testament and other early Christian literature (3rd ed.) (173). Chicago: University of Chicago Press.