Title: Vajiralongkorn
Content:  When Vajiralongkorn was introduced to Yuvadhida Polpraserth, she was an aspiring actress. She became his steady companion and gave birth to his first son, Prince Juthavachara Mahidol, on 29 August 1979. He later had three more sons and a daughter by her. They were married at a palace ceremony in February 1994, where they were blessed by the King and the Princess Mother, but not by the Queen. After the marriage, she was allowed to change her name to Mom Sujarinee Mahidol na Ayudhaya, signifying she was a commoner married to royalty. She was also commissioned as a major in the Royal Thai Army and took part 
Title: Vajiralongkorn
Content:  Vajiralongkorn was born on 28 July 1952 at 17:45 in the Amphorn Sathan Residential Hall of the Dusit Palace in Bangkok. When the crown prince was one year old, Somdet Phra Sangkharat Chao Kromma Luang Vajirananavongs, the 13th Supreme Patriarch of Thailand of the Rattanakosin Era, gave the child his first name at birth, "Vajiralongkorn Borommachakkrayadisonsantatiwong Thewetthamrongsuboriban Aphikhunuprakanmahittaladunladet Phumiphonnaretwarangkun Kittisirisombunsawangkhawat Borommakhattiyaratchakuman" (วชิราลงกรณ บรมจักรยาดิศรสันตติวงศ เทเวศรธำรงสุบริบาล อภิคุณูประการมหิตลาดุลเดช ภูมิพลนเรศวรางกูร กิตติสิริสมบูรณ์สวางควัฒน์ บรมขัตติยราชกุมาร). He is the only son, the second of the four children of King Bhumibol Adulyadej and Queen Sirikit. Vajiralongkorn began his education in 1956 when he entered kindergarten at the Chitralada School in Dusit Palace. After completing Mathayom 1 (grade seven), he was sent to be educated at independent schools in 
Title: Vajiralongkorn
Content:  Vajiralongkorn (วชิราลงกรณ;, ; born 28 July 1952) is the King of Thailand. He is the only son of King Bhumibol Adulyadej and Queen Sirikit. In 1972, at the age of 20, he was made crown prince by his father. After his father's death on 13 October 2016, he was expected to ascend to the throne of Thailand but asked for time to mourn before taking the throne. He accepted the throne on the night of 1 December 2016. His coronation took place from 4–6 May 2019. The Thai government retroactively declared his reign to have begun on 13 October 2016, upon his father's death. As the tenth monarch of the Chakri dynasty, he is also styled as Rama X. Aged 64 at that time, Vajiralongkorn became the oldest Thai monarch to ascend to the throne. He is the wealthiest monarch in the world, with a net worth estimated to be between US$30 billion and US$70 billion.
Title: Vajiralongkorn
Content:  On 3 January 1977, Vajiralongkorn married Princess Soamsawali Kitiyakara (born 1957), a first cousin on his mother's side. They had one daughter, Princess Bajrakitiyabha, born in 1978. Crown Prince Vajiralongkorn started living with actress Yuvadhida Polpraserth in the late 1970s and had five children with her. Although Princess Soamsawali had refused divorce for many years, Vajiralongkorn was finally able to sue for divorce in the Family Court in January 1993. In the court proceedings, Vajiralongkorn accused Princess Soamsawali of being completely at fault for the failed relationship. She was not able to refute the charges due to the prohibition against lèse majesté. The divorce was finalized in July 1993. Princess Soamsawali and her daughter continue to play a significant role in royal ceremonies.
Title: Vajiralongkorn
Content:  Vajiralongkorn married for a third time on 10 February 2001, to Srirasmi Suwadee (royal name: Akharaphongpreecha), a commoner of modest background who had been in his service since 1992. The marriage was not disclosed to the public until early 2005. She gave birth to a son, Prince Dipangkorn Rasmijoti, on 29 April 2005 and was then elevated to the rank of princess. Her son was immediately elevated to the rank of prince. In a magazine interview shortly after that, Vajiralongkorn stated his intention to settle down. In November 2014, however, Vajiralongkorn sent a letter to the interior ministry asking for Princess Srirasmi's family to be stripped of the royal name Akharaphongpreecha awarded to her, following allegations of corruption against seven of her relatives. The following month, Srirasmi relinquished her royal titles and the royal name and was officially divorced from Vajiralongkorn. She received 200 million baht (US$5.5 million) as a settlement. They had been married for 13 years.
Title: Vajiralongkorn
Content:  reigning Thai monarch. After the death of King Bhumibol, political activity was paused during a period of mourning that ended in 2017. In February 2019, in a move called "unprecedented", the King's elder sister, Ubol Ratana, announced her candidacy for the Thai prime ministership in the 2019 general election, running as a candidate of the Thaksin-allied Thai Raksa Chart Party. Later that same day, Vajiralongkorn issued an emergency royal decree stating that her candidacy for prime minister is "inappropriate...and unconstitutional". Thailand's election commission then disqualified her from running for prime minister, formally putting an end to her candidacy. Vajiralongkorn has direct control over the royal household and palace security agencies.
Title: Vajiralongkorn
Content:  On 1 May 2019, three days before his coronation, Vajiralongkorn married Suthida Tidjai, former acting commander of Royal Thai Aide-de-Camp Department. Suthida was therefore made the queen consort of King Vajiralongkorn whose coronation took place in Bangkok on 4–6 May 2019. The marriage registration took place at the Amphorn Sathan Residential Hall in Bangkok, with his sister Princess Sirindhorn and President of Privy Council Prem Tinsulanonda as witnesses.
Title: Vajiralongkorn
Content:  royal ceremonies with Vajiralongkorn. In 1996, two years after the wedding, Mom Sujarinee (as she was now known) decamped to Britain with all her children, while Vajiralongkorn caused posters to be placed all around his palace accusing her of committing adultery with Anand Rotsamkhan, a 60-year-old air marshal. Later, the prince abducted the daughter and brought her back to Thailand to live with him. She was later elevated to the rank of princess, whilst Sujarinee and her sons were stripped of their diplomatic passports and royal titles. Sujarinee and her sons moved to the United States, and as of 2007, she was known as Sujarinee Vivacharawongse.
Title: Chakri dynasty
Content: King Vajiralongkorn (Phra Vajira Klao Chao Yu Hua) ; Queen Suthida (the King's consort) ; Princess Bajrakitiyabha the Princess Rajasarinisiribajra (the King's older daughter) ; Princess Sirivannavari (the King's younger daughter) ; Prince Dipangkorn Rasmijoti (the King's fifth and youngest son and heir presumptive to the throne of Thailand) ; Queen Sirikit, the Queen Mother (the King's mother, the late King Rama IX's consort) ; Princess Sirindhorn (second daughter of King Rama IX) ; Princess Chulabhorn, the Princess Srisavangavadhana (youngest daughter of King Rama IX) ; Princess Siribhachudhabhorn (Princess Chulabhorn's older daughter) ; Princess Adityadhornkitikhun (Princess Chulabhorn's younger daughter) ; Princess Ubolratana Rajakanya (oldest daughter of King Rama IX) This is a list of current members of the royal family: 
Title: Vajiralongkorn
Content:   According to the 2007 Constitution, the cabinet instructed the president of the National Assembly to invite Crown Prince Vajiralongkorn to the throne. He became the first monarch to be born in Thailand since his great-uncle Prajadhipok. After his father, Bhumibol Adulyadej, died on 13 October 2016, Vajiralongkorn was expected to succeed to the throne of Thailand but asked for time to mourn before taking the throne. On the night of 1 December 2016, the fiftieth day after the death of Bhumibol, Regent Prem Tinsulanonda led the heads of the country's three branches of government to an audience with Vajiralongkorn to invite him to ascend to the throne as the tenth king of the Chakri dynasty. Vajiralongkorn accepted the invitation, saying in a televised statement: "I would like to accept in order to fulfill his majesty's wishes and for the benefit of all Thais." The government retroactively declared his reign to have begun upon his father's death, but it would not crown him formally until after the cremation of his father. The remains were then cremated on 26 October 2017. Currently, his main residence is Amphorn Sathan Residential Hall, with the king having moved from Nonthaburi Palace in 2011.

Question: Who is the mother of Vajiralongkorn?
Answer: Sirikit.
Sirikit Kitiyakara.