Here's the family Tree Chart of PRINCE EN.KI and PRINCE EN.LIL

by calling him EN.lil, you're already entitling him as a prince due to the 'EN'-part, as EN.LIL itself is his entitlement for being the prince of the sky/air (a title for the role he's fulfilling , not his real name tough).
actually, i do know what you really meant, but i'm just saying.. for consideration... as its easy to consider/use titles as names. And this is also how they were used for, referring to them by their identifiable entitlements, so without having to provide a real name, as the meaning already lies in the title and actual names would be not as useful in such manner.
So the sole purpose for having titles is not to be meaningless, but i guess i'm taking you too literally here again because i know you meant it different, as in you don't care who's entitled to what regarding their egotism, and i agree with you too, as indeed not everyOne likes that one selfish en.tity entitled en.lil so you dont have to say 'sorry' to anyone xP (lil.pun as i'm kid.ding you.. again yes i know you didn't meant 'sorry' literally like that but just point.ing it out as another example to the concept i'm talking about what actually happens when we use these words we use like that..just to keep in mind...if you know what i'm saying, if not..nevermind...)

i understand what you meant, but for consideration, i wanted show how this sounds taking it literally
so i just wanted to point out that because you're already referring to him as 'prince' or 'lord' by his title EN.lil
it's kinda like saying "i don't respect 'mylord'/prince, i would never call him my lord/prince ... sorry" xP