A CM local passed by. To answer your question regarding the Na Chiang Mai: Nope. There are still many of them. Example: copy and search on YT for "เจ้านาง Story ทายาทสายสกุล ณ เชียงใหม่ แห่งล้านนา" The girl is that vid is my junior from faculty of economics at Chiang Mai University named Pong or what I would call "Nong Pong" Her real name is Sangtawan Na Chiang Mai. Her sister is also a professor at that faculty named Duantemduang Na Chiang Mai or what we called Ajarn (means master/professor) Pang. Her cousin Wittanee Na Chiang Mai is a professor at faculty of medicine CMU and a very close friends of my sister. There are, like I said, a lot more. These are just some examples.