Meritamen was a daughter of Ramesses and his favourite wife Nefertari. She appears as the fourth daughter in the list of daughters in Abu Simbel and had at least four brothers: Amun-her-khepeshef, Pareherwenemef, Meryre and Meryatum, as well as a sister named Henuttawy. Meritamen may have had more brothers and sisters, but these five are known from the facade of Queen Nefertari's temple in Abu Simbel.
Her eldest brother - Amun-her-khepeshef - was the crown prince until at least year 25 of the reign of their father. Prince Prehirwenemef is known to have served in the army and is depicted in the battle scenes from Kadesh. The youngest sibling known to us - Prince Meryatum - would later become High Priest of Re in Heliopolis.
Around the time her mother died (around the 24th or 25th regnal year), Meritamen became Great Royal Wife, along with her half-sister Bintanath.