Rim'mon,

a deity worshipped by the Syrians of Damascus, where there was a temple or house of Rimmon.

2Ki 5:18

Rimmon is perhaps the abbreviated form of Hadad-rimmon, Hadad being the sun-god of the Syrians. Combining this with the pomegranate which was his symbol, Hadad-rimmon would then he the sun-god of the late summer, who ripens the pomegranate and other fruits.