Raja Biru or Ratu Biru (Thai: รายาบีรู; Malay: راتو بيرو; c. 1566–1624) ruled the Sultanate of Patani (1616–1624), succeeding her sister Raja Hijau.
She was the second of three daughters of Sultan Mansur Shah who ruled the country.
In response to the threats, she was said to have ordered a man of Chinese descent named Tok Kayan to create three large cannons.
[1] One of these Phaya Tani was later seized by the Siamese and is now located in Bangkok.
[2][3] Raja Biru persuaded the Kelantan Sultanate in the south to become incorporated into Patani.