International Standard Bible Encyclopedia 
( רמּון , rimmōn , "pomegranate"; see Rimmon-Perez ):
(1) A S yrian god. Naaman the Syrian leper after being cured is troubled over the fact that he will still have to bow down in the house of the Syrian god, Rimmon, when his master goes into the house to worship leaning on his hand ( 2 Kings 5:18 ). Elisha answers him ambiguously: "Go in peace." Judging from Naaman's position and this incident, Rimmon must have been one of the leading gods of the Syrians worshipped in Damascus. He has been identified with Rammanu, the Assyrian god of wind, rain and storm. The name appears in the Syrian personal names Hadadrimmon and Tabrimmon (which see) and its meaning is dubious ( ramâmu , "to thunder" (?))
Cyclopedia of Biblical, Theological and Ecclesiastical Literature 
On the identification of this rock with that of Rummon, see the Quar. Statement of the "Palest. Explor. Fund," October 1881, page 247. The village Rumaneh is not described in the Memoirs accompanying the Ordnance Survey.