From Latin Mithras.
- A Roman god, cult figure of the 2nd-4th century Roman mystery religion known as the "Mysteries of Mithras" (now colloquially Mithraism)
Probably via Ancient Greek Μίθρας (Mithras), via some unattested Old Iranian intermediary, ultimately from vocative Avestan 𐬨𐬌𐬚𐬭𐬀 (Miθra), from Proto-Indo-Iranian *mitram (“contact”), whence *mitra (“contractual partner, friend”), conceptualized as a deity, from Proto-Indo-European *mei (“to bind”). Related to Sanskrit मित्र (mitra), Vedic god associated with Varuna, among the earliest Indic names known.
Mithrās (genitive Mithrae); m, first declension