Chai changed his last name from Romruen to Hansen as a dedication to his mom's sacrifice over the years raising him.
Some fathers would be against it but not me. If my daughter decides to change her last name to her mom's last name or some other last name, it wouldn't bother me at all. As long as she continues to love me and be a good productive member of society with good characters, I could careless what her new name is.
Chai was born in Thailand to a Thai father (Superut Romruen) and an Australian mother (Sandra Hansen). He's currently new Monkey King on Netflix: