Dein Mani-Yut (Mon: ဒိန်ၝိတ်ရတ်; Burmese: ဒိန်မဏိရွတ်, Burmese pronunciation: [dèiɴ mənḭ jʊ̯ʔ]; commonly known as Amat Dein (အမတ်ဒိန်, "Minister Dein") or as Amat Tein (အမတ်တိန်, "Minister Tein")) was co-chief minister of Hanthawaddy during the reign of King Razadarit (1384–1421). He was also a senior general, and held key governorship posts at Syriam (1370s–1408), Bassein (1408–1415) and Sittaung (1415–1420s). Along with his colleague Byat Za, Dein was instrumental in Razadarit's reunification campaigns of the Mon-speaking kingdom in the late 1380s, as well as the Forty Years' War against the Burmese-speaking Ava Kingdom.