Thread:Bennia Lover/@comment-21335883-20170425144658/@comment-30924344-20170425163814

"Is" a word in the third person and "A" is used when mentioning someone or something for the first time in a text or conversation, so it makes sense as it is referring to Beelzebub's name [third person] being a name [mentioning Beelzebub for the first time] of a demon. Saying "is the name of a demon" is also correct though its just another way to phrase it.