 Prince Devawongse Varoprakar was the 42nd child of King Mongkut's 82 children.He is the founder of the House of Devakula (ราชสกุลเทวกุล) and was also known for naming the solar calendar months after the zodiac signs.Prince Devavongse Varoprakar was born in Bangkok's Grand Palace on 27 November 1858 to HM the King Mongkut , Rama IV of Siam and Princess Consort Piyamavadi (Piam Sucharitakul).