Unakan Ananta Norajaya (; ; 20 February 1856 â 29 March 1873) His Royal Highness Prince Ananta Norajaya he was a son of King Mongkut (Rama IV) and consort Piam Sucharitakul.
He had the same parents as the three queens of King Chulalongkorn: Queen Sunandha Kumariratana, Queen Savang Vadhana and Queen Saovabha Bhongsi. Unakan Ananta Norajaya was the 29nd child of King Mongkut.
He have a one son :
His serene Highness Prince (name not known) was born on July 17, 1873, and died on July 19, 1874, when he was only 1 year old.
Prince Unakan Ananta Norajaya died on 29 March 1873 at the age 17.