There are still several facts about Akhenaten's reign which
are unclear, in particular the possibility of co regency with
his father at the start of his reign or with Smenkhkare
at the end.
There is also uncertainty about the relationship between Akhenaten
and his successors, Smenkhkare and Tutankhamun. It is accepted that Nefertiti
had 6 daughters, but no son was ever shown in reliefs. It is
possible that both successors were Akhenaten's sons by another
wife, possibly Kiya who was 'much loved' of the Pharaoh.
The final mystery of Akhenaten was what became of his mummy.
Fragments of sculpture and carving from the royal
tomb at Akhetaten shows that his body was originally put
there, but no sign of the mummy remains. It is possible that
followers of the Aten feared for it's destruction, which would
deny him eternal life, and moved the body to a place of safety,
possibly at Thebes.