‘ And Othniel the son of Kenaz, Caleb's younger brother, took it, and he gave him Achsah his daughter to wife.'
It was probably Kenaz who was Caleb's younger brother. The son and daughter were thus cousins. Othniel was probably Caleb's hope in the first place. ‘Son of Kenaz' might simply indicate that he too was a Kenizzite, but it is unlikely that Caleb would give his daughter to his younger brother in this way (Leviticus 18:9), and there is no reason why a Kenizzite should not be called Kenaz.