Sanya was born at Bangkokyai, Tonburi. His parents were councillor Praya Tammasatvejwisatpak and Lady Chuen Tammasak. He married Lady Panga Tammasak. He began to study at Assamchanbangrak school, Bangkok. After that he got into study in a school of law. He got a scholarship from the Rapee Foundation to went to study law in London.