Hamon-gog
Easton's Dictionary
Multitude of Gog, the name of the valley in which the slaughtered forces of Gog are to be buried (Ezek. 39:11, 15), “the valley of the passengers on the east of the sea.”
International Standard Bible Encyclopedia
ha'-mon-gog (hamon-gogh, "the multitude of Gog"): The name of the place where "Gog and all his multitude" are to be buried (Eze 39:11,15). By a change in the pointing of Eze 39:11, ha-`abharim for ha-`obherim, we should read "valley of Abarim" for "valley of them that pass through." In that case it would seem that the prophet thought of some ravine in the mountains East of the Dead Sea.