Background
She was the eldest daughter of King Sneferu and hence a half-sister to King Khufu.
Career
George Andrew Reisner argued against this theory and suggested that Nefertkau may have married Khufu. He does allow for the possibility that Nefertkau married a noble man whose name was lost. Nefertkau may have buried in mastaba G 7050 at Giza.
The tomb is not inscribed however so that the ownership is somewhat conjectural.