Let’s Go Back to the Beginning
Sean Astin was originally born Sean Patrick Duke on February 25, 1971 – with his mother’s surname because his father’s identity was unknown at the time. Don’t worry, we’ll explain when it changed and why. Stay tuned! So, why didn’t his mother know his father?
Source: Tumblr
Well, Sean’s mother, Patty, was between relationships for just a matter of days when she found out she was with child. This made it difficult to be sure who the real father was. And she wasn’t the only one interested in knowing this information.