Unakan Ananta Norajaya (Thai: พระเจ้าบรมวงศ์เธอ พระองค์เจ้าอุณากรรณอนันตนรไชย; RTGS: Phrachao Borom wong Phra Ong Chao Unakan Ananta Norachai; 20 February 1856 – 29 March 1873) His Royal Highness Prince Ananta Norajaya he was a son of King Mongkut (Rama IV) and consort Piam Sucharitakul.

Unakan Ananta Norajaya was the 29nd child of King Mongkut.

[1][2] 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.

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