Probably of foreign derivation; perhaps meaning fire; Adar, the 12th Hebrew month -- Adar.
H143. Adar
אֲדָר proper noun [masculine] 12th (Babylonian) month = Feb.-Mar. (late Hebrew loan-word, = Babylonian A(d)-daru see DlWp. 188, compare Al 3 93, meaning dubious perhaps adâru, be darkened, eclipsed, but see DlW p. 190) Esther 3:7, 12; 8:12; 9:1, 15, 17, 19, 21; compare Palmyrene, Nabataean אדר Vog8 EutNab 24.
אֲדָר (K§ 57 a) proper name 12th month (Biblical Hebrew id.); — Ezra 6:15.