Nefertiti

After the move to Akhetaten, Nefertiti gave birth to three more princesses. Nefernefruaten ta-sherit, Nefernefrure and Setepenre. Nefertiti was present at the death of Meketaten, she is shown there mourning the loss of the second princess with Akhenaten, Meritaten, Ankhesenpaaten, and Nefernefruaten ta-sherit.
Nefernefrure and Setepenre are missing from the scene and either:

1. already have died
2. were deemed too young to participate and were not drawn in the scene.

But soon after this tragic event, Nefertiti ceases to be mentioned. Her names and titles are erased and replaced with those of Meritaten and Ankhesenpaaten.

Some have proposed that Queen Nefertiti ceased to be mentioned because she had become a Pharaoh, Smenkhkara the successor of Akhenaten, in that case:

• She reigned for a short period and was probably succeeded by Tutankhaten how married Nefertiti's daughter Ankhesenpaaten,
• Some theories believe that Nefertiti was still alive and had an influence on the young couple.
• If this is the case that influence and presumably her own life would have ended by year 3 of Tutankhaten's reign.
• In that year, Tutankhaten changed his name to Tutankhamen, as evidence of his worship of Amun, and abandoned Amarna to return the capital to Thebes.

Maybe, Akhenaten's beautiful one just passed away. It is by far the simplest explanation.
Perhaps it is the enigma of Nefertiti that draws so many to her, or perhaps it is her serene beauty, preserved forever in that famous bust by the magnificent sculptor, Thutmose.