μάρτυρ

υρος, ἡ
μάρτυρ, υρος , ὁ and ἡ, Aeol. for Att. μάρτυς, Hdn.Gr.1.47, al.; also Dor., SIG 953.22 (Calymna, ii B.C.); cf. μάρτυρος, ἐπιμάρτυρος.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project