great picture to match the name! Belzebulb sounds kinda... bubble-y compared to the other demon's names, but you took use of that and really made him pop with the splashes of purple and red- which make him seem royal... oh, i could go on forever! XD fantastic picture!
Sorry, just had to reply to this. The answer to your question is no it's not. Lucifer is known as the Demon of the Sin of Pride, whilst Beelzebub is the Sin of Gluttony, but they are the same in both of the being high ranked Fallen Angels.^^ Although there has been gazillions of speculations of other demons being connected to the lord of hell himself just by using different names such as Belial, Samael, etc.
Haha, yes two actually. Angelology is the study of angels and Demonology of course is the study of demons. I did a lot of studying in Angelology, not too terribly much in Demonology, studying very deep into Demonology, is quite dangerous.
I loved this, but I absolutely MARVEL the detail you put into his boots/shoes/feet/somethings that look like armored feet. Are these characters yours or do you draw other people characters? On request?