Princess Suvabaktra Vilayabanna or Phra Chao Boromwongse Ther Phra Ong Chao Suvabaktra Vilayabanna (RTGS: Suwaphak Wilaiphan) (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้าสุวพักตร์วิไลยพรรณ) (2 May 1873 – 30 July 1930), was a Princess of Siam (later Thailand), the daughter of Chulalongkorn, King Rama V of Siam. Her mother was (later elevated to Lady (Chao Khun Phra) Prayuravongse), daughter of (son of Somdet Chao Phraya Borom Maha Si Suriyawongse). She had one elder sister and one younger sister: Vilayabanna died on 30 July 1930, at the age of 57.