Hi, I just did a post on this cultivar, according to my friend who is studying Thai and from a different Thai seller the more accurate romanization of this cultivar is Niw Nang Ram.
https://www.bananas.org/f2/niw-nang-...ang-55164.html
It is an AA Diploid, likely a red form of Pisang Lilin or Pisang Jari Buaya.
A very attractive plant.