 In addition to these sources , Djedkare is mentioned on the <unk> <unk> dating to the 12th Dynasty ( c . 1990 – 1800 BCE ) . The papyrus records The <unk> of Ptahhotep and gives Djedkare 's nomen " Isesi " to name the pharaoh whom the purported authors of the <unk> , vizier Ptahhotep , served . Djedkare was also probably mentioned in the <unk> , a history of Egypt written in the 3rd century BCE during the reign of Ptolemy II ( 283 – <unk> BCE ) by the Egyptian priest <unk> . No copies of the <unk> have survived to this day and it is known to us only through later writings by <unk> Julius <unk> and Eusebius . <unk> relates that a pharaoh " Tancherês " ( Ancient Greek <unk> ) reigned for 44 years as the eighth and penultimate king of the Fifth Dynasty . Given its position within the dynasty , Tancherês is believed to be the Hellenized name of Djedkare Isesi . 
