Grammatically, these words may refer to Kenaz or to Othniel. If they refer to Kenaz, then Othniel was the nephew, not the brother, of Caleb. It is impossible to tell which is correct. The writer specifically uses the word “younger” in order to explain that there was no great disparity in age between Othniel and Achsah. If affection for a woman animates men to such strenuous efforts and perilous adventures, what should love for the Lord lead them to hazard for Him?