The Das Schmidt Haus Baby Name Game

Stop me if you’ve heard this one before.
An ancient history professor went to the hospital to be with his wife as she gave birth to their first child. While the baby was born, the professor’s expression never changed. The child was put in the arms of his mother. Still the professor’s countenance never changed. The family moved from the delivery room to the post delivery room. Still the man’s face didn’t change; it remained bland. A nurse noticed this and asked him to go into the hall while they examined the baby.
In the hall she asked the professor, thoughtfully, “What name will you give the baby?” He replied, “Theophilus.”