Ba'al Zebub or Beelzebub, also spelled Beelzebul or Belzebuth, and occasionally known as the Lord of the Flies, is a name derived from a Philistine god, formerly worshipped in Ekron, and later adopted by some Abrahamic religions as a major demon. The name Beelzebub is associated with the Canaanite god Baal.

Ekron, in the Hellenistic period known as Accaron was a Philistine city, one of the five cities of the Philistine Pentapolis, located in present-day Israel.