sentences:  The particle "na Ayutthaya" indicates this distant royal ancestry.Chirayu's father Charunphan Isarangkun Na Ayuthaya was a diplomat, foreign minister, and member of King Bhumibol's Privy Council.Chirayu visited Bangkok's prestigious all-boys Saint Gabriel's College, before moving to the King's College School in Wimbledon, London, where he acquired his A-levels in 1960.