How is it offensive, it is literally part of their last name and I've seen many people joke around about it. I don't think its that deep and don't think anyone means to attack the Thai girls when saying this. I think it crosses EVERY (non Thai) person when reading their last names
But ofc I can be completely ignorant and maybe it is indeed very offensive if you guys could explain how.
Since you're from Turkey, I guess you wouldn't mind people call you thanksgiving roasted bird.