Did he have a brother named Sue? If so, I might know the reason ...

> And he said, "Son, this world is rough

> And if a man's gonna make it, he's gotta be tough

> And I knew I wouldn't be there to help ya along.

> So I give ya that name and I said goodbye

> I knew you'd have to get tough or die

> And it's the name that helped to make you strong."

Johnny Cash - A Boy Named Sue

Lyrics by Shel Silverstein [0]

0: https://en.wikipedia.org/wiki/A_Boy_Named_Sue