Did the tenth plague also included fathers if they were the firstborn?

Great question! I had to research this one a bit ....

At first we might think that Egyptian fathers were included but in Exodus 12:29 we learn that the plague was limited to offpring (children and the young of animals), not adult sons (fathers or adult animals). Verse 29 says, "At midnight the Lord struck down all the firstborn in Egypt, from the firstborn of Phoraoh, who sat on the throne, to the firstborn of the prisoner, who was in the dungeon, and the firstborn of all the livestock as well."