'Younger' in the Bible

Your older sister was Samaria, who lived north of you with her daughters, and your younger sister, who lived south of you, was Sodom with her daughters.

Then you will remember your conduct, and be ashamed when you receive your older and younger sisters. I will give them to you as daughters, but not on account of my covenant with you.

Oholah was the name of the older and Oholibah the name of her younger sister. They became mine, and gave birth to sons and daughters. Oholah is Samaria and Oholibah is Jerusalem.