Sometimes it's hard to know which Asian culture an Asian is from and under what system they are presenting their name. A Vietnamese national working n the USA

Sometimes it's hard to know which Asian culture an Asian is from and under what system they are presenting their name. A Vietnamese national working n the USA may say Thanh Nguyen (with Nguyen being their family name). You basically have to memorize the top last names in every culture or just ask them what they want to be called.