Mekuti Sutthiwong (Thai: เมกุฏิสุทธิวงศ์; died 1581) or Mae Ku (Thai: แมกุ) 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, Mekuti is venerated as Yun Bayin (Burmese: ယွန်းဘုရင်, pronounced [jʊ́ɰ̃ bəjɪ̀ɰ̃]; lit. 'King of the Yuan'), one of 37 nats in the official pantheon of Burmese nats.