'Younger' in the Bible

Othniel, Caleb's nephew through his younger brother Kenaz, captured the city, so Caleb awarded him his daughter Achsah in marriage.

When the Israelis cried out to the LORD, the LORD raised up Othniel son of Caleb's younger brother Kenaz, to deliver them, and he did.

Her father said, "Because I honestly thought that you hated her deeply, I gave her in marriage to your best man. Isn't her younger sister better than she? Please then, let her be yours instead."