Muwatalli II
Manapa-Tarhunta had passed on the succession to Manapa-Kurunta (presumably Tarhunta's son) by the time of the treaty between Muwatalli II (1295-1272 BCE) and Alaksandu of Wilusa. The Manapa-Tarhunta letter would then have been written in the later years of Mursili or else the earlier years of Muwatalli II.