The infant horus received the Greek sounding name Harpocrates, and Serapis, Isis, and Harpocrates became the Egyptian Trinity for Graeco-Roman Society.
"Roman Society from Nero to Marcus Aurelius"
Samuel Dill
Hence arose the error of horus Apollo; who, having been informed that the antient Egyptians distinguished many things which were esteemed holy by this sacred title, referred the whole to hieroglyphics, and gave out that they were all represented under the figure of a dog.
"A New System; or, an Analysis of Antient Mythology. Volume II. (of VI.)"
Jacob Bryant
Opposite are three figures in a sitting posture, representing the Egyptian Trinity, Osiris, horus, and Isis.
"The South of France--East Half"
Charles Bertram Black