|Easton's Bible Dictionary|
Fly-lord, the god of the Philistines at Ekron (2 Kings 1:2, 3, 16). This name was given to the god because he was supposed to be able to avert the plague of flies which in that region was to be feared. He was consulted by Ahaziah as to his recovery.
Int. Standard Bible Encyclopedia
ba-al-ze'-bub ba`al zebhubh = "Lord of flies"; Baal-muian: A deity worshipped by the Philistines at Ekron (2 Kings 1:2, 3, 6, 16). All that can be gathered from this one reference to him in ancient literature is that he had some fame as a god that gave oracles. Ahaziah, son of Ahab, and king of Israel, went to consult him whether he should recover of his sickness, and was therefore rebuked by Elijah, who declared that his death would be the result of this insult to Yahweh. Why he was called "lord of flies," or whether his real name has not be en corrupted and lost are matters of conjecture. See BAAL (1).
Baalzebub (4 Occurrences)
2 Kings 1:2 And Ahaziah fell down through a lattice in his upper chamber that was in Samaria, and was sick: and he sent messengers, and said unto them, Go, enquire of Baalzebub the god of Ekron whether I shall recover of this disease. (KJV)
2 Kings 1:3 But the angel of the LORD said to Elijah the Tishbite, Arise, go up to meet the messengers of the king of Samaria, and say unto them, Is it not because there is not a God in Israel, that ye go to enquire of Baalzebub the god of Ekron? (KJV)
2 Kings 1:6 And they said unto him, There came a man up to meet us, and said unto us, Go, turn again unto the king that sent you, and say unto him, Thus saith the LORD, Is it not because there is not a God in Israel, that thou sendest to enquire of Baalzebub the god of Ekron? therefore thou shalt not come down from that bed on which thou art gone up, but shalt surely die. (KJV)
2 Kings 1:16 And he said unto him, Thus saith the LORD, Forasmuch as thou hast sent messengers to enquire of Baalzebub the god of Ekron, is it not because there is no God in Israel to enquire of his word? therefore thou shalt not come down off that bed on which thou art gone up, but shalt surely die. (KJV)