Mae Ku or Mekuti Sutthiwong was king of Lan Na from 1551 to 1564. His reign saw the transition of Lan Na into a vassal state under the Burmese-led Toungoo empire, following Bayinnaung's capture of Chiang Mai. In Burmese folk religion, Mae Ku is venerated as Yun Bayin, one of 37 nats in the official pantheon of Burmese nats.