Commentaries:
Barnes' Notes
Beeroth - See the marginal reference. From Joshua 9:17, it might have been expected that the population of Beeroth would be Canaanite. But from some unknown cause the Canaanite inhabitants of Beeroth had fled to Gittaim - perhaps the same as Gath - and continued there as sojourners. If this flight of the Beerothites took place at the time of Saul' s cruel attack upon the Gibeonites II Samuel 21:1-2, Baanah and Reehab may have been native Beerothites, and have been instigated to murder the son of Saul by a desire to avenge the blood of their countrymen. The fact of their being reckoned as Benjamites is quite compatible with their being Canaanites by blood.
Other Barnes' Notes entries containing 2 Samuel 4:2:
2 Samuel 2:10
1 Chronicles 10:6
DISCLAIMER: Church of the Great God (CGG) provides these resources to aid the individual in studying the Bible. However, it is up to the individual to "prove all things, and hold fast to that which is good" (I Thessalonians 5:21). The content of these resources does not necessarily reflect the views of CGG. They are provided for information purposes only.