Where does “Muhammadism” come from?
Muhammadism (English) comes from English Muhammad, from Arabic مُحَمَّد, from Classical Persian جَان, from Middle Persian 𐫃𐫏𐫀𐫗, from Proto-Iranian *wyaHnáH, from Proto-Indo-Iranian wyaHnás, from Proto-Indo-European h₂enh₁‑.
Ancestry of “Muhammadism”, step by step