I have suggested calling the total personality which, though present, cannot be fully known, the self. The ego is, by definition, subordinate to the self and is related to it like a part to the whole.
Jung’s foundational definition of the Self as the total personality of which the ego is merely a subordinate part, establishing the core hierarchical relationship at the heart of analytical psychology.
, Aion: Researches into the Phenomenology of the Self, 1951thesis