🔼The name Dimnah in the Bible
The name Dimnah occurs only once in the Bible. It's listed as one of four cities that the tribe of Zebulun gave to the Merarite Levites (Joshua 21:35). The Chronicler submits that Zebulun and Reuben together gave twelve cities to the Merarites, but doesn't list them by name (1 Chronicles 6:63). But the Chronicler also reports that Zebulun gave cities to the other Levites, namely Rimmono (רמונו) and Tabor (6:77).
Rimmono is arguably the same as Rimmon (רמון), mentioned as a town in Zebulun (Joshua 19:13), and since the letters ד (daleth) and ר (rosh) look somewhat alike, and the Chronicler made it an obvious sport to garble names — some scholars speak of text errors but that is positively nonsense; there are too many of them, and the Chronicler can only have been a professional scribe and most probably a whole school of them, who didn't do anything without a deliberate intention — our town Dimnah may be the same as Rimmon.
🔼Etymology of the name Dimnah
The name Dimnah appears to come from the rather unflattering root דמן (dmn), having to do with manufactured manure:
For a meaning of the name Dimnah, NOBSE Study Bible Name List reads Dung Heap and Jones' Dictionary of Old Testament Proper Names has Dunghill. BDB Theological Dictionary doesn't offer an interpretation of our name but does list it under the root דמן (dmn).