1. Chao Fa - This title is usually restricted to the children of a king or queen. There are at present only five Chao Fa living , one prince and four princesses; they include the present Crown Prince, two daughters of His Majesty King Bhumibol Adulyadej, his sister, and the daughter of His late Majesty King Vajiravudh [Rama VI]. Another daughter of His present Majesty, the former Princess Ubol Ratana Rajakanya, who relinquished her royal title in 1972, was also of this rank.