Thiri Thudhamma Yaza (Burmese: သီရိ သုဓမ္မ ရာဇာ, pronounced [θìɹḭ θṵdəma̰ jàzà], Pali: Sīrisudhammarājā; 8 April 1561 – c. May 1584) was viceroy of Martaban (Mottama) from 1581 to 1584.
He was the younger brother of King Nawrahta Minsaw of Lan Na and Princess Yaza Datu Kalaya.
The future viceroy was born Thinga Dathta (သင်္ဃာ ဒတ္ထ, [θɪ̀ɴgà daʔtʰa̰]) to Queen Yaza Dewi and King Bayinnaung of Toungoo Dynasty on 8 April 1561 at the Kanbawzathadi Palace.
[3] The new viceroy was asked to co-lead, along with Minye Kyawhtin,[note 3] the ongoing war with Arakan.
[4] On 28 September 1581,[note 4] his army of 18,000 men, 800 horses, 60 elephants left Pegu for Arakan.