Maha Dewi of Hanthawaddy

Maha Dewi (c. 1322–c. 1392), born Mwei Na, was a daughter of King Saw Zein and Queen Sanda Min Hla and elder sister of King Binnya U of Martaban.

From 1364 she governed Dagon, and after 1369 she was her ailing brother's closest adviser, ruling the kingdom in all but name by the early 1380s. A court faction led by the chief minister tried to undermine her with talk of an affair with her nephew-in-law Smin Maru.

In October 1383 Binnya U made her regent, but she could not put down the rebellion of her nephew and adopted son Binnya Nwe, secretly backed by the chief minister. When U died in January 1384 the court chose Nwe as King Razadarit, who sent her back to Dagon in a purely ceremonial role.