Sometimes the situation is clarified by the use of the extended title Sa Nesu en Khetef (“King’s son of his body”), but that could also mean the grandson of the king and occasionally referred to persons not actually related to the king. The title Iry Pat is often mistranslated as “Hereditary Prince” (like its feminine counterpart Iryt Pat, a title sometimes used by Egyptian Queens). As ever, it is not as simple as that. From the middle of the 18th dynasty of the New Kingdom it seems to refer to a person acting in the interests of the king, but not necessarily their son. For example, Horemheb used this title as the heir of Ay even though they were not related by blood (although they may have been related by marriage).
