Wisutkasat (Thai: วิสุทธิกษัตรีย์, Khmer: វិសុទ្ធិក្ឞត្រីយ៍ or វិសុទ្ធិក្សត្រី), was a Siamese Queen and Princess during the Ayutthaya period in the 16th century, born Sawatdirat (Thai: สวัสดิราช, Khmer: ស្វ័ស្តិរាជ) to Prince Thianracha (later King Maha Chakkraphat) and Suriyothai. She was a mother of two kings (Naresuan and Ekathotsarot, and the maternal ancestor of the Sukhothai Dynasty, which ruled Ayutthaya from 1569-1629.