1 Samuel 15:6

The Kenites. Members of the family into which Moses married are referred to both as Midianites (Num. 10:29) and as Kenites (Judges 1:16) either because both names refer to the same family stock or because two families had united. Some commentators have identified the Kenites as descendants of Kenaz, a grandson of Esau by Eliphaz, but nothing certain is known of their origin (see on Gen. 15:19). The Kenites are to be distinguished from the Kenizzites (Gen. 15:19). The Midianites, and thus probably the Kenites also, were descendants of Abraham by his wife Keturah (see on Ex. 2:16). The Amalekites were descendants of Esau (see on Gen. 36:12) and therefore blood relatives of both the Kenites and the Israelites. Some of the Kenites, or Midianites, accompanied the children of Israel to the Promised Land (see on Num. 10:29-32) and received an inheritance there, among the people of Judah (Judges 1:16) and far to the north in Naphtali (Judges 4:10, 11). It may be that the Kenites here referred to were descendants of those who had settled in the southern part of Judah, adjacent to Amalekite territory, and had intermarried with the Amalekites (see 1 Sam. 27:10).