Numbers 32:38
And Nebo, and Baalmeon, (their names being changed,) and Shibmah: and gave other names unto the cities which they builded.
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, that when these places came into the hands of the Moabites, their ancient names were restored to them, as appears from Isaiah 15:2
and Shibmah; the same with Shebam, Numbers 32:3, and gave other names unto the cities which they built; but they are neither known, nor did they always continue, as has been observed.