Nyuserre Ini
In 2009, archaeological discoveries in Abusir, the royal necropolis of the Fifth Dynasty, have established that Neferirkare was in fact Sahure's son (who was Userkaf's son). Egyptologists now believe that the story of Rededjet is based on a conflation of two historical royal women named Khentkaus. The first one, Khentkaus I, lived during the Fourth Dynasty and may have given birth to two kings, while the second one, Khentkaus II, was the mother of two Fifth Dynasty kings, Neferefre and Nyuserre Ini. The supposition is that when Nyuserre Ini was on the throne, he revived the cult of the Khentkaus I, as the similarities between both women provided him with a genealogical link relating him to his Fourth Dynasty forebears.