Namhsan explained by wikipedia

Namshan (Om-yar in Palaung), also spelt Namhsan, is the capital of Tawngpeng, a Palaung substate in northern Shan State of Burma. The only Palaung kingdom in the Shan States, the people of the town are predominantly of the Ka-tur (Samlong) tribe. [1] The people of the tribe are often referred to as the Golden Palaung because of the color of the belts that they wear.[2]

In Palaung, Namshan means trembling waters and the town is thought to be so named because it is situated on a marsh which gets flooded during the rains. In its heydey, during the 1920s and 1930s, the town prospered because of the presence of silver mines in the kingdom and because of the tea grown in the area. The tribe was heavily studied by the anthropologist Leslie Milne.