What is "ptahshepses"

Ptahshepses (meaning " Ptah is foremost") was the vizier and son-in-law of the Fifth Dynasty pharaoh Nyuserre Ini. As such he was one of the most distinguished members of the royal court. Ptahshepses' mastaba complex in Abusir is considered by many to be the most extensive and architecturally unique non-royal tomb of the Old Kingdom.