They're probably the et'Ada.
Compare:
The Digitals say we come from another star, but so many have forgotten. I have not, for my lineage granted me audience with Memory, and I have spoken with the Wheels of Lull. - Loveletter
(...) [Anu] attempted to save Creation by forming the remnants of the 12 worlds into one -- Nirn, the world of Tamriel. (...) The only survivors of the twelve worlds of Creation were the Ehlnofey and the Hist. The Ehlnofey are the ancestors of Mer and Men. The Hist are the trees of Argonia. Nirn originally was all land, with interspersed seas, but no oceans. (...) - Anuad
Both suggest that we came from somewhere else. A star, can be used to describe a god, just as a planet can be.
The marriages of the Aether describe the birth of all magic. Like a pregnant [untranslatable], the Aurbis exploded with its surplus. Will formed and, with it, the Potential to Action. This is the advent of the first Digitals: mantellian, mnemolia, the aetherial realm of the etada. The Head of this order is Magnus, but he is not its Ward, for even he was subcreated by the birth of Akatosh. - Loveletter
This part here can be found in any monomyth. Will (Anuiel) formed and with it the
Potential to
Action (Sithis). Their interaction created the first et'Ada, hence they're the digitals.