Nefertem was the son of Sekhmet and Ptah In Memphis. Faience plaques of the Memphite triad are of Late Period, Saite Dynasty 261

Blue glaze plaque of the Memphite triad

Blue glaze H 2.3, W 1.4 Late Period
© The Trustees of the British Museum #EA74094

Copper alloy Memphite triad of Sekhmet, Ptah and Nefertem

Copper alloy H 7.4, W 5.8 Late Period
© 2011 Musée du Louvre/Antiquités égyptiennes #E 3822

Reference

1Andrews C. Amulets of Ancient Egypt, 1994, p. 19