The House of Bunnag (Thai: บุนนาค; rtgs: Bunnak) was a powerful Siamese noble family of Persian descent of the early Rattanakosin Kingdom of Siam. By the nineteenth century, its power and influence reached its zenith. The family was favored by Chakri monarchs and monopolized high-ranking titles. Three of the four Somdet Chao Phraya came from the Bunnag family — Dis, styled Somdet Chao Phraya Borom Maha Prayurawongse; his younger brother Tat, styled Somdet Chao Phraya Borom Maha Pichaiyat; the eldest son Chuang, styled Somdet Chao Phraya Borom Si Suriyawongse. They played key roles in government and foreign relations until after the Front Palace crisis. As Chulalongkorn sought to undo the power of nobility and pursue centralization, the Bunnags gradually withdrew from prominent roles in Siamese politics but continued to fill important official ranks.
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Sheikh Ahmad
Sheikh Ahmad, a Persian merchant, along with his brother Muhamad Sa-id and subordinates, settled in Siam around 1600. Sheikh Ahmad was a native of Qom in Safavid Iran, south of Tehran. He established himself as a rich merchant in Ayutthaya. There he entered the service of King Songtham (1611–1628) who appointed him as Chao Kromma Tha Khwa (เจ้ากรมท่าขวา; Lord of the Right Pier) to supervise traders from the West, i.e. Persians, Indians and Europeans. He was also appointed Chularatchamontri (จุฬาราชมนตรี; Minister of Islamic affairs) to oversee all Shiites in Siam.
Chao Phya Bowom Rajnayok (Sheikh Ahmed). Shiaddina Ashen [i.e. "reviver Shiite] Muslim, was born in 1543 s.o. in the Paeene Shriller distlict of Qum. the Islamic centre of Iran. Towiusis the end of the reign of King Harman the Great Er. 1590-1605i, Sheikh Ahmed and his retinue migrated to Ayudhya and set up their residential and trading quarters in the Ghayee landing district. His business prospered and he became very wealthy. He was married to a lady named [Chuey', who bore him two sons and a daughter. Asa result of his contribution to the development of the port administration in the reign of King Songditam [Song Them, r. 1610/11-1628], Sheikh Ahmed was appointed by royal command to be Phya Sheikh Ahmed Ranana Rajsethee, Head of [Krom The of the Right' in charge of foreign trade and responsible for the settling of disputes among foreigners other than Chinese, and as Chula Rajmontri [i.e. Shaykh al-Islam], the leader of the Muslim community. he was the first holder of the 'Chula Rajmontri' title and was recognized as the person who introduced the Shiadthna Ashen sect, (i.e., Twelver Shi'ism) to Thailand. Subsequently, Sheikh Ahmed, together with his devoted friends, helped suppress an uprising in Ayudhya when a group of foreigners seised the Grand Palace. This dangerous deed let to his promotion by the king to the title 'Chao Phya'. He that became Chao Ph, Sheikh Ahmed Rattan Dhibodi, holding position of the 'Principle Minister for Civil Affairs (North)'. During the reign of King Prasarnhong [r. 1629], when Sheikh Ahmed was 87 years old, the king appointed him 'Emeritus Councillor for the Civil Affairs' with the new tide of [Chao Phya Bowan Rajnayok'. He passed away one year later in 1631 A.D. at the age of 88.
After subjugating a Japanese revolt under Yamada Nagamasa, Sheikh Ahmad became Samuha Nayok (First Prime Minister). Descendants of Sheikh Ahmad exerted control over Siamese politics, trade and foreign affairs. Many of them became Samuha Nayok. They also monopolized the post of Chularachamontri. All of them converted to Buddhism.
Settlement in Thonburi
A man called Bunnag was a Buddhist descendant of Sheikh Ahmad. Bunnag married the sister of Nak, who was the wife of Thong Duang. He was then kinsmen to Thong Duang. Though Thong Duang emerged as a powerful noble in Thonburi, Bunnag stayed far from the bureaucracy due to his childhood conflicts with Taksin.
Thong Duang then became Phutthayotfa Chulalok, the first king of the Chakri dynasty in 1782. During the Nine Armies' Wars, Bunnag led the Siamese forces against the Burmese. He was then promoted and eventually became the Samuha Kalahom as Chao Phraya Akkaramahasaena.
Rise of Prayurawongse
Akka Mahasena was the primogenitor of the House of Bunnag. He sent his sons, including Dis and That, into the palace as the royal pages of Phutthayotfa Chulalok to gain an entrance into Siamese bureaucracy. Dis quickly rose to higher official ranks as Buddha Loetla Nabhalai favored the nobles from the Bunnag family and Dis's maternal family, the Bangchang. Dis then became the minister of Kromma Tha, supervising trade and foreign affairs under King Nangklao.
He was offered the position of Samuha Kalahom (Second Prime Minister) by the king, but Dis declined, saying that prime ministers died early. He then became Samuha Kalahom instead.
During the Siamese–Vietnamese Wars, Dis led the Siamese forces to Vietnam and imposed a naval blockade on Saigon. The campaigns were successful, however, and the war ended in 1845. With the death of Bodindecha in 1849, Dis remained the only powerful noble in the court.
Dis played a key role in the ascension of Mongkut, whether or not Nangklao intended to give the throne to his half-brother. The legend is that Nangklao wanted his son, Prince Annop, to succeed him, even giving Annop the bracelet passed down from his grandfather Phutthayotfa Chulalok. However, Dis switched the bracelet for a forged one, so the genuine one was not passed to Prince Annop. Dis lobbied for Mongkut, a monk of 27 years, to succeed the throne.
In 1851, when Mongkut had succeeded the throne, he made Dis Somdet Chao Phraya Borom Maha Prayurawongse and regent in the kingdom. Prayurawongse's brother, That, became Somdet Chao Phraya Borom Maha Pichaiyat and regent in Bangkok. The Somdet Chao Phraya title was the highest noble title, rivaling royalty. The first to hold the title, Maha Kshatriyaseuk, had become the first monarch of Chakri dynasty.
Mongkut gave much of his power to the regents he appointed. Prayurawongse was also competent in trade and foreign affairs and crucial to negotiating the Bowring Treaty.
Sri Suriyawongse
Somdet Chao Phraya Borom Maha Sri Suriyawongse (Thai: สมเด็จเจ้าพระยาบรมมหาศรีสุริยวงศ์; Chuang Bunnag) was a prominent 19th-century Thai figure and served as the regent during the early years of the reign of King Chulalongkorn.
The eldest son of Dis Bunnag (Prayurawongse, สมเด็จเจ้าพระยาบรมมหาประยูรวงศ์) and Tan Poo-Ying Chan, Chuang, was well educated. King Mongkut made him Samuha Kalahom, one of the two prime ministers of Old Siam.
After the death of King Mongkut in 1868, his young son Prince Chulalongkorn became the new monarch. However, as the new king was underage, Sri Suriyawongse was named as regent, a post he held until 1873. The Front Palace Crisis of 1874-5 changed the power dynamic in Siam, after which both Bunnag and noble influence waned.
Sri Suriyawongse died in 1883 in Ratchaburi. He was also the first Thai to have a life insurance policy, after Chulalongkorn granted foreign companies permission to extend their insurance business into Siam.
His son Won Bunnag succeeded him as Samuha Kalahom and also held the title Chao Phraya Surawongse.