Hypothetically, you find out your dad changed his last name because he hated his father. Let’s say he changed it to the last name of a fictional character he really liked, then went completely no-contact with his family decades ago, before you were even born. Then, 20-something years later, you discover your grandmother is still alive, and your last name isn’t actually your dad’s birth last name.
What would you do?
I would be incredibly impressed that he found a whole other family to go along with his ruse fir 20 years?