Brown Driver Briggs

 Rehoboth = "wide places or streets"
1. the 3rd of a series of wells dug by Isaac in the territory of the
Philistines
2. one of the 4 cities built by Asshur or by Nimrod in Asshur located
close to Nineveh
3. a city of Saul or Shaul, one of the early kings of the Edomites