Hanthawaddy Mibaya[note 1] (Burmese: ဟံသာဝတီ မိဖုရား, pronounced [hàɴθàwədì mḭbəjá]; c. 1536 – June 1606) was the chief queen consort of King Nanda of Toungoo Dynasty of Burma (Myanmar) from 1581 to 1599.
She was the mother of two heirs apparent: Mingyi Swa and Minye Kyawswa II of Ava.
They were at least half-cousins since her father Tabinshwehti and Nanda's mother Atula Thiri were half-siblings, and may have been double cousins if her mother was Dhamma Dewi since Nanda's father Bayinnaung and Dhamma Dewi were siblings.
The victor kept the royal couple well at the palace but his son Natshinnaung assassinated the fallen king a year later.
He moved her to stay with her eldest daughter, who was married to his younger brother, Minye Kyawhtin (later known as Thado Dhamma Yaza), with a full retinue of attendants.