HARMON.Amo_4:3 (RV [Note: Revised Version.] ; AV [Note: Authorized Version.] the palace). No place of the name of Harmon is known. The text appears to be hopelessly corrupt.
Hastings' Dictionary of the Bible
Edited by James Hastings, D.D. Published in 1909
Harmon
(Heb. Harmon', הִרְמוֹן probably from הָר, to be high; Sept. τὸ ὄρος τὸ ῾Ρομμάν; Vulg. excelsus mons; A.V. "the palace"), a place only mentioned in Amo_3:4, as that to which the inhabitants of Samaria would be led forth by their Assyrian conquerors, evidently, therefore, some unknown locality of the captivity. The ancient interpretations are obviously mere etymological conjectures, chiefly by a resolution of the first part of the name into הִר a mountain; "and the latter into a form of מַנַּי, Armenia, or
רַמּוֹן,' Rimmon; which are unsuitable. Kimchi makes it equivalent to אִרְמוֹן a town.
CYCLOPEDIA OF BIBLICAL, THEOLOGICAL AND ECCLESIASTICAL
press 1895.