Hermaeus wrote On Egyptians, book 1. Plutarch, On Isis and Osiris 37, cites him: Osiris translated means “mighty” (ὄμβριμος). In chapter 42 Plutarch adds Hermaeus’s other name of the god, Omphis, which he says means “benefactor.” The same Plutarch context distinguishes Egyptian Arsaphes from Osiris and mentions Dionysus as son of Zeus and Isis.
Müller, FHG 4, p. 427. Canon: HERMAEUS Hist. (A.D. 1?). This is a cult-historian of Egypt, not Hermaeus the Indo-Greek king of the Paropamisadae.
The Greek is Osiris-etymology, not a Bactrian royal life.
Available Works
On Egyptian Deities
Ἀπόσπασμα
2 passages
Also published as PDF.