well, if you have her name, that a good start, hopefully her full name, surname. as there are a few members from that area on this forum, that's a good start.
so..............................let's have it, got a couple that may know the family, and possibly give some good advice, negative or positive.
Nong Wua So is not a small compact place, it's large and spread out, country living w/many villages. so legwork is going to be tough, unless very lucky. advantage, decent farang community. but ask here first, might get lucky.

i tried tracking down a family in a small town from the little ladies neighborhood, and surprising struck out, so good luck. this was a small, old family town, checked everywhere/everyone, and couldn't track down the family, even had house book info. so you have a huge task ahead of you. good luck.