'Youngest' in the Bible

After they had moved it, the Lord’s hand was against the city of Gath, causing a great panic. He afflicted the men of the city, from the youngest to the oldest, with an outbreak of tumors.

Samuel asked him, “Are these all the sons you have?”“There is still the youngest,” he answered, “but right now he’s tending the sheep.” Samuel told Jesse, “Send for him. We won’t sit down to eat until he gets here.”

and David was the youngest. The three oldest had followed Saul,

They also had kidnapped the women and everyone in it from the youngest to the oldest. They had killed no one but had carried them off as they went on their way.

Nothing of theirs was missing from the youngest to the oldest, including the sons and daughters, of all the plunder the Amalekites had taken. David got everything back.