🔼The name Rehoboth-ir in the Bible
The name Rehoboth is assigned to two different locations in the Bible. In the wake of a quarrel between the men of Gerar and those of Isaac, the latter dug a well and named it Rehoboth, saying, "At last the Lord has made room for us..". (Genesis 26:22).
Rehoboth-ir is a city in Assyria, built by Nimrod (Genesis 10:11). The author of the story lists Rehoboth-ir between Nineveh and Calah, but then mentions that Nimrod built Resen, the Great City between those cities. Judging from the similarity between the meaning of the name Rehoboth-ir and the epithet of Resen, this is probably not a coincidence.
🔼Etymology of the name Rehoboth-ir
The name Rehoboth comes from the verb רחב (rahab), to be wide:
According the context, the name of Isaac's well, Rehoboth, means something like Space or Room.
The name Rehoboth-ir consists of the name Rehoboth plus the word עיר ( 'ir), the regular word for city:
The name Rehoboth-ir means City Of Room, or Big City. NOBSE Study Bible Name List translates this name with Broad Places, Streets. Jones' Dictionary of Old Testament Proper Names reads Streets, Wide Spaces.