Manuchehr
Manuchehr is a Persian (Middle Persian) name famous from Persian epic literature, not an original Arabic name.
Yes; Manuchehr is a legendary king found in the genealogies and narratives of Ferdowsi's Shahnameh.
Yes, some Muslim Persian families use it as a rare, literary name that signals Persian heritage.
Etymologically from Middle Persian Manūčihr (Manū + čihr); scholarship commonly interprets meanings around 'immortal lineage' or 'soul‑face'.
Typically pronounced mah-noo-CHEHR (IPA approximations /mænuːˈtʃehr/ or /mɑnuːˈtʃehr/).