Borrowed from Ancient Greek μάρτυρ (mártur) (genitive μάρτυρος (márturos)), later form of μάρτυς (mártus, “witness, martyr”).
ⲙⲁⲣⲧⲩⲣⲟⲥ • (marturos) m (plural ⲙⲁⲣⲧⲩⲣⲟⲥ (marturos))