He was traditionally thought to be the son of Pepi I and Queen Ankhesenpepi II, but the South Saqqara Stone annals record that Merenre had a minimum reign of 11 years. Several 6th Dynasty royal seals and stone blocks – the latter of which were found within the funerary temple of Queen Ankhesenpepi II, the known mother of Pepi II – were discovered in the 1999–2000 excavation season at Saqqara, which demonstrate that she also married Merenre after Pepi I's death and became this king's chief wife. Inscriptions on these stone blocks give Ankhesenpepi II the royal titles of: "King's Wife of the Pyramid of Pepy I, King's Wife of the Pyramid of Merenre, King's Mother of the Pyramid of Pepy II". Therefore, today, many Egyptologists believe that Pepi II was likely Merenre's own son. Pepi II would, therefore, be Pepi I's grandson while Merenre was, most likely, Pepi II's father since he is known to have married Pepi II's known mother, Queen Ankhesenpepi II. This would also conform well with the evidence from the South Saqqara Stone which shows no coregency between the reigns of Pepi I and Merenre thus making it far more likely that Pepi II was Merenre's own son.