I don't know about China, but in Vietnam there are 14 family names which account for about 90% of the entire population.
Roughly 40% of all Vietnamese people are called "Nguyen", which makes it one of the most common family names in the world.
Roughly 40% of all Vietnamese people are called "Nguyen", which makes it one of the most common family names in the world.
Also Diane in Bojack Horseman surname! Guessing she's of Vietnamese ascent!