There the
name Mutnedjmet is spelled like this:
Mutnedjmet
or Mutbenret?
In a tomb
in Amarna the sentence is: "Sister of
the great royal wife
Nefertiti; may she live always and forever; Mutnedjmet"
Mutbenret
would be spelled completely different, here a comparison:
So in my
opinion, Mutnedjmet (Mtndmt) is the most likely translation for the
sister of Nefertiti.