I didn’t find information about his title. I mean he is the King or Lord or… what?
I’m not sure he’s exactly from the grimoiric tradition that used European and British medieval military heraldic hierarchies as an analogy to categorize the entities, but I have seen him called Emperor.
… or people just call him Lord the same way people called a lot of entities Ba’al or Lord.
i also saw him getting called emperor
I’ve heard Lord, and also some calling him Father.
In traditional ceremonial magick, his official title is Emperor of Hell. He is also sometimes given the title of king, though that is a lesser role than emperor (Lucifer is said to rule over the spirits of the Goetia, and the Goetia is full of kings).
In the Dukante hierarchy, he is listed in Family 1 as an air elemental under Satan. He has no title in this hierarchy, while Satan is given the title of king.
It was revealed to me that Lucifer is the light bearer, father of Truth, the Infernal Emperor
Some even referred to him as I’ve heard as Prince of Darkness
Throughout the ages, during his interaction with men, that being “Lucifer” has been given many titles by those who came into encounter with him
I doubt these titles matter tho, given the circumstances the term/word Lucifer came about especially in modern lexicon, “Lucifer” itself (Lux-Fere) is and can be considered a title - but that’s just my own personal thoughts and opinions
titles for spirits in general are a human concept