1.   With the birth of his firstborn son, the nobleman had thrown an elaborate party for hundreds of guests.

2.   He had his firstborn son as his assistant.

3.   I had worked up a good healthy dread for the Pinewood Derby long before my firstborn son, Cody, was old enough to join the Cub Scouts.

4.   They let me out of the hospital in time to take the new baby, my firstborn son, home for Christmas.

5.   Born in Canton, Tam was only a year old when her landowner parents fled Communist China with their firstborn son.