Where does “Muhammadanism” come from?

Muhammadanism (English) comes from English Muhammadan, 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‑ — to breathe.

Ancestry of “Muhammadanism”, step by step

StepLanguageWordMeaning
1EnglishMuhammadanAlternative form of Mohammedan
2EnglishMuhammadBaphomet
3Arabicمُحَمَّدpraised, commendable, laudable; Muhammad
4Classical Persianجَان—
5Middle Persian𐫃𐫏𐫀𐫗—
6Proto-Iranian*wyaHnáH—
7Proto-Indo-IranianwyaHnás—
8Proto-Indo-Europeanh₂enh₁‑to breathe
Every word from Proto-Indo-European h₂enh₁‑ →Every word from Proto-Indo-Iranian wyaHnás →Every word from Proto-Iranian *wyaHnáH →