Wikipedia
Thamphthis
Thamphthis is the hellenized name of an ancient Egyptian ruler ( pharaoh) of the 4th dynasty in the Old Kingdom, who may have ruled around 2500 BC under the name Djedefptah for between two and nine years. His original Egyptian name is lost, but it may have been Djedefptah or Ptahdjedef ("he endures like Ptah") according to William C. Hayes. Thamphthis is one of the shadowy rulers of the Old Kingdom, since he is completely unattested in contemporary sources. For this reason, his historical figure is discussed intensely by historians and egyptologists.