According to BDAG,
Βεελζεβούλ was originally a Philistine deity; the name means Baal
(lord) of flies (2 Kings 1:2, 6) ... in the NT Beelzeboul is prince
of hostile spirits ἄρχοντι τῶν δαιμονίων Matt 12:24, Luke 11:15, etc.
See also the appendix below for a very similar lexical entry.
The word occurs just seven times in the NT and can be classified as follows:
- Jesus uses the name Beelzeboul metaphorically to signify the Jewish leaders were followers of the devil, Matt 10:25, (Matt 12:27)
- Jesus is accused of being in league with the Beelzeboul, the prince of demons, Matt 12:24, 27, Mark 3:22, Luke 11:15, 18, 19
- Beelzeboul is called the leader/prince of the demons, Matt 12:24, Mark 3:22, 23, 26 (Beelzeboul = Satan here)
Thus, in the NT, "Beelzeboul" appears to have been used as another name for Satan, the prince of the demons.
APPENDIX Thayers entry for Βηλζεβουλ
Βηλζεβουλ and, as written by some (yet no Greek) authorities, Βηλζεβουβ (cod. B Βηζεβουλ, so manuscript א except in Mark 3:22; adopted by WH, see their Appendix, p. 159; cf. Buttmann, 6), ὁ, indeclinable, Beelzebul or Beelzebub, a name of Satan, the prince of evil spirits: Matthew 10:25; Matthew 12:24, 27; Mark 3:22; Luke 11:15, 18, 19. The form Βηλζεβουλ is composed of זְבוּל (rabbinical Hebrew for זֶבֶל dung) and בַּעַל, lord of dung or of filth, i. e. of idolatry; cf. Lightfoot on Matthew 12:21. The few who follow Jerome in preferring the form Βηλζεβουβ derive the name from זְבוּב בַּעַל, lord of flies, a false god of the Ekronites (2 Kings 1:2) having the power to drive away troublesome flies, and think the Jews transferred the name to Satan in contempt. Cf. Winers RWB under the word Beelzebub: and J. G. M(üller) in Herzog vol. i., p. 768ff; (BB. DD.; cf. also Meyer and Dr. James Morison on Matthew 10:25; some, as Weiss (on Mark, the passage cited; Biblical Theol. § 23 a.), doubt alike whether the true derivation of the name has yet been hit upon, and whether it denotes Satan or only some subordinate 'Prince of demons'). (Besides only in ecclesiastical writings, as Ev. Nicod. c. 1f.)