Lewis & Short

Haemĭmontus (Aemi-), i, m., a province of Thrace, adjoining Mount Hœmus, Vop. Aur. 17, 2; Treb. Poll. Claud. 11, 3; Sext. Ruf. 9; Notit. Dign. Imp. Occid. 1.
Hence, Haemĭmontāni (Aemi-), ōrum, m., the inhabitants of Hœmimontus, Amm. 27, 4, 11.