🔼The name Ir-nahash in the Bible
Ir-nahash is an inconsequential town in Judah (1 Chronicles 4:12). This name occurs in a genealogy and at first glance it's the name of a son of someone called Tehinnah. But the Hebrew word אב (ab), meaning father, is often used to denote a tribal head or a town's or nation's founding father. In that same genealogy occurs the name Ge-harashim, meaning Valley of Craftsmen (4:14).
🔼Etymology of the name Ir-nahash
The first part of the name Ir-nahash is the regular Hebrew word עיר ('ir), meaning city:
The second part is identical to the name Nahash, which in turn is identical to the root נחש (nhsh):
Taking all the above into consideration, the name Ir-nahash can be translated as Serpent City (NOBSE Study Bible Name List) or City Of Serpents (Jones' Dictionary of Old Testament Proper Names), but with a very big footnote.