He was born during the king I of Ratanakosin Era. On the 26th of June, in 1786 he was behind the palace where the Bangkok - noi train station was located. His father was from Rayong province. His mother was from another province. Sunthorn Phu was born after Bangkok city was established. His father and his mother divorced, and then his father became a monk at Bangrum temple. where he was originally from and his mother went to serve princess as a wet nurse.