What even are Daedric Princes (is it a proper cateogry)?

What I mean by this is that is there anything in common between the Daedric princes besides that they have parts of oblivion divided up into realms. Some creation myths, most famously the Altmeri, say they are et'Ada which didn't help create Mundus, but then we have Malacath who was created after convention, Meridia used to be Magna-Ge, Mehrunes Dagon's origin is especially strange because Mankar Camoran claims he was created by the Magna-Ge but The Seven Fights of The Aldudagga (very disputed OOG text) says he was the Leaper King before Alduin ate him. When you consider these seemingly unrelated origins, it appears there is actually very little common in-between Daedric princes and Daedra as a category. If a super powerful mage flew up to Oblivion like the Imperial Mananauts did and created a pocket dimesion to be his realm, what is stopping him from being a Daedric prince.