'Oldest' in the Bible

So Abraham instructed his servant, who was the oldest member of his household and in charge of everything he owned, "Make this solemn oath to me

Judah found a wife for his oldest son Er. Her name was Tamar.

But the LORD considered Er, Judah's oldest son, to be wicked so he put him to death.

The palace manager searched for the cup, beginning with the oldest brother's sack and ending with the youngest brother's sack, and there it was! in Benjamin's sack.