1.   At roundup time, Mercer teams with his oldest son, Gary, who flies a helicopter.

2.   There always had been ambivalent feelings between father and oldest son.

3.   When the Duke dies, his oldest son will come into the estate.

4.   My oldest son is just coming up to sixteen.

5.   As the oldest son, he was next in line to the throne.

6.   They are crammed wall-to-wall all through the house in stacks taller than your oldest son.

7.   Osbern, the oldest son and the hope of the family, if a bit wild as yet.

8.   It was common for a man to enter his own name, that of his wife, and that of his intended successor, usually the oldest son.

9.   He was actually the oldest son of a farmer and er was expected to stay at home and the firm.

10.   Andrew, as the oldest son, helped his mother with his three sisters and kid brother.