He married Mom Pamela Smee on June 10, 1950. Two children were born from this union:
On September 24, 1969, he married his cousin, Princess Galyani Vadhana, King Bhumibol's eldest sister. He also had two concubines, Princess Kokeaw Prakaykavil na Chiang Mai and Srisalai Suchatwut.
HH Prince Waranonthawat at the Wayback Machine (archived October 26, 2009)