And the people of Reuben built Heshbon, Elealeh, Kiriathaim,
And Nebo, and Baalmeon, (their names being changed,).... For Nebo was the name of an idol, after which perhaps the city was called: Baalmeon signifies "Baal's habitation", and where it is highly probable was a temple of his; and the children of Reuben, not liking to retain such idolatrous names, gave them others, but what they were it is not said; and certain it is...
Num 32:37-38 The Reubenites built Heshbon, the capital of king Sihon (see Num 21:16), which was allotted to the tribe of Reuben (Jos 13:17), but relinquished to the Gadites, because it was situated upon the border of their territory, and given up by them to the Levites (Jos 21:39; 1Ch 6:66).
Commenting on Numbers 32:37-38