Protective god of the necropolis of Memphis. He is usually depicted as a hawk-headed human. As a funerary god, he was often identified with Osiris, but he was also seen as a craftsman and maker of unguents and so identified with Ptah. The composite god PtahSokar-Osiris is attested during the Middle Kingdom but becomes more prominent during the Late Period, when statues dedicated to him become a standard part of funerary equipment.
Historical Dictionary Of Ancient Egypt by Morris L. Bierbrier
Ancient Egypt. A Reference Guide. EdwART. 2011.