The Osirian triad is highly common and refers to the resurrection of Osiris. Horus the child is depicted nude with the sidelock of youth in between his mother Isis and his aunt, Nephthys. Position on mummies: breast, chest, or stomach1. These faience amulets are of the Late Period1
Blue glaze
H 4.7, W 3.4, D 2.5
Ptolemaic Period
MET #26.7.890
Brown glaze H 4.0, W 2.2
Late Period © 2002 Musée du Louvre/Christian Décamps # AF 10979
Blue/green glaze
H 5.2, W 3.7, D 1.8
Late Period © The Trustees of the British Museum #EA11638
Reference
1Petrie W F M. Amulets, 1914, p. 85, Figs. 152a,b