A.T. Robertson Commentary Matthew 10:25

"It is enough for the disciple that he be as his teacher, and the servant as his lord. If they have called the master of the house Beelzebub, how much more them of his household!" — Matthew 10:25 (ASV)

Beelzebub (βεεζεβουλ according to B, βεελζεβουλ by most Greek MSS., βεελζεβουβ by many non-Greek MSS.). The etymology of the word is also unknown, whether "lord of a dwelling" with a pun on "the master of the house" (οικοδεσποτην) or "lord of flies" or "lord of dung" or "lord of idolatrous sacrifices." It is evidently a term of reproach. "An opprobrious epithet; exact form of the word and meaning of the name have given more trouble to commentators than it is all worth" (Bruce). See Mt 12:24.