Na Hnaa Tong is of the Maethaa Mahaniyom/Maha Sanaeh family of Na/Yant.
Intended to attract friendly interest, love and compassion – protection From illness is also inflected.
This is often cast as a spell by rubbing gold leaf on the forehead and then blowing the necessary kata into it.
Good for business too — makes you likeable/believable when talking to customers.