Naresuan
Early life

Prince Naret (Thai: พระนเรศ) was born in Phitsanulok in 1555–56. He was the son of King Mahathammarachathirat of Phitsanulok and his queen consort, Wisutkasat. His mother was a daughter of Maha Chakkraphat and queen consort Suriyothai. His father was a Sukhothai noble who had defeated Worawongsathirat in 1548 and put Maha Chakkraphat on the throne. Prince Naret, also known as the "Black Prince" (Thai: พระองค์ดำ), had a younger brother Ekathotsarot, known as the "White Prince", and an elder sister, Suphankanlaya.

During the siege of Ayutthaya during the Burmese–Siamese War (1563–64), King Bayinnaung of the Toungoo dynasty of Bago, Burma (formerly known in Burmese as Hanthawaddy (Burmese: ဟံသာဝတီ and in Thai as RTGS: Hongsawadi หงสาวดี) led a massive army, invading the country and laying siege to Phitsanulok. Maha Thammarachathirat came to believe that the city would not be able to withstand a long siege due to a scarcity of food and a smallpox outbreak, so he surrendered the city. King Bayinnaung took Phitsanulok and Ayutthaya, and made Thailand a Burmese tributary state. He required Maha Thammarachathirat to send his son—the Black Prince—to Bago as a royal hostage to ensure the king's fidelity.
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