Another wife of Ramessu (II) was Queen Isetnofret. She had at least three sons with Ramessu (II); Khaemwaset [pictured right], Prince Ramses-Meryatum (otherwise referred to as Ramses Junior), and Merenptah. These sons appear to have held important roles at court, with Khaemwaset being the High Priest of Ptah and conducting restorations to old monuments on behalf of his father. Khaemwaset's burial place has never been discovered, but it's believed that he may have been buried at Saqqara close to the Serapeum, due to a golden mask that was discovered there. Prince Ramses-Meryatum was buried in King's Valley 5, and Merenptah was Ramessu's (II) eventual successor to the throne. There are two known daughters of Isetnofret, called Bintanat and Isetnofret (II). Bintanat later became her father's wife, too. Prince Suty who was buried at King's Valley 5, and Princess Nebettawy may have also been the offspring of Queen Isetnofret. Like Bintanat, Nebettawy also married her father, Ramessu (II).
Links to my favourite sites containing information on Ancient Egyptian Royalty:
Ancient Egypt - Site by Anneke Bart, containing details on Egyptian royalty and officials, priests etc .
Foreign rulers of Egypt - Names of Egypts foreign rulers.