HRH Princess Piyamavadi Sri Bajarindra Mata, the Royal Consort to King Mongkut or Chao Khun Chom Manda Piam (Thai

Thai alphabet

Thai script , is used to write the Thai language and other, minority, languages in Thailand. It has forty-four consonants , fifteen vowel symbols that combine into at least twenty-eight vowel forms, and four tone marks ....

:เจ้าคุณจอมมารดาเปี่ยม). She was one of the royal wives of King Mongkut

Mongkut

Phra Bat Somdet Phra Poramenthramaha Mongkut Phra Chom Klao Chao Yu Hua , or Rama IV, known in foreign countries as King Mongkut , was the fourth monarch of Siam under the House of Chakri, ruling from 1851-1868...

. When her grandson, Crown Prince Maha Vajiravudh

Vajiravudh

Phra Bat Somdet Phra Poramentharamaha Vajiravudh Phra Mongkut Klao Chao Yu Hua , or Phra Bat Somdet Phra Ramathibodi Si Sintharamaha Vajiravudh Phra Mongkut Klao Chao Yu Hua , or Rama VI was the sixth monarch of Siam under the House of Chakri, ruling from 1910 until his death...

 (Rama VI) acceded to the throne to be King Vajiravudh

Vajiravudh

Phra Bat Somdet Phra Poramentharamaha Vajiravudh Phra Mongkut Klao Chao Yu Hua , or Phra Bat Somdet Phra Ramathibodi Si Sintharamaha Vajiravudh Phra Mongkut Klao Chao Yu Hua , or Rama VI was the sixth monarch of Siam under the House of Chakri, ruling from 1910 until his death...

, he promoted the Princess Consort to be Somdej Phra Piyamavadi Sri Bajarindra Mata (meaning: Princess Mother of Queen Saovabha

Saovabha

Queen Saovabha Bongsri was a half-sister and queen of King Chulalongkorn of Thailand, and mother of both King Vajiravudh and King Prajadhipok...

) .
She had 6 children with King Mongkut.

1. Prince Unakan Ananta Norajaya (พระเจ้าลูกเธอ พระองค์เจ้าอุณากรรณอนันตนรไชย)
2. Prince Devan Uthayawongse (พระเจ้าลูกเธอ พระองค์เจ้าเทวัญอุไทยวงศ์) (Prince Devavongse
   Devavongse
   Prince of Devavongse Varoprakarn was the second foreign minister of Thailand 1881-1923.Born as son of King Mongkut and Princess Consort Piam with the given name Prince Devan Uthayavongse , he had the same parents as the 3 queens of King Chulalongkorn, Queen Sunandha Kumariratana, Queen Savang...
   
    Varoprakarn)
3. Princess Sunandha Kumariratana (พระเจ้าลูกเธอ พระองค์เจ้าสุนันทากุมารีรัตน์) (Queen Sunandha
   Sunandha
   Queen Sunandha Kumariratana was a daughter of King Mongkut and Princess Consort Piam. Her given name is Princess Sunandha Kumariratana...
   
   )
4. Princess Savang Vadhana (พระเจ้าลูกเธอ พระองค์เจ้าสว่างวัฒนา) (Queen Savang Vadhana
   Savang Vadhana
   Queen Savang Vadhana of Siam was a consort of King Chulalongkorn or Rama V. Her full name and title was Queen Sri Savarindira - thus she was not the Rajini , but just was a highest consort...
   
   )
5. Princess Saovabha Bongsi (พระเจ้าลูกเธอ พระองค์เจ้าเสาวภาผ่องศรี) (Queen Saovabha
   Saovabha
   Queen Saovabha Bongsri was a half-sister and queen of King Chulalongkorn of Thailand, and mother of both King Vajiravudh and King Prajadhipok...
   
   )
6. Prince Svasti Sobhana (พระเจ้าลูกเธอ พระองค์เจ้าสวัสดิโสภณ) (Prince Svastivatana Visishta)