Who is XXX's sister?
Meritaten Tasherit
Since both Meritaten Tasherit and another princess, Ankhesenpaaten Tasherit appear only in texts that once mentioned Akhenaten's second wife Kiya, it is also possible that they were children of Akhenaten and Kiya, or that they were fictional, replacing the name of Kiya's daughter, who might have been Beketaten, more commonly thought to be Tiye's child.
Ankhesenpaaten Tasherit