Beelzebul means “lord of the house” in the supplied explanation. It was the title of a heathen deity that Jews applied to Satan as prince of the demons. Beelzebul is identified as the correct New Testament reading rather than Beelzebub.
Jesus’ opponents claimed that He cast out demons by Beelzebul’s power. The title appears in the Gospel passages describing this accusation and Jesus’ reply.
The supplied material distinguishes Beelzebul from the variant form Beelzebub and identifies the former as the more accurate reading.