Than Phu Ying Boonruen Choonhavan (née Sophot; Thai: บุญเรือน ชุณหะวัณ; RTGS: Bunruean Chunhawan; 25 April 1920 – 14 August 2021) was a Thai socialite who was the wife of Chatichai Choonhavan, Prime Minister of Thailand and a relative of the Queen Mother Srinagarindra.

[1] Chatichai and Boonruen had two children, daughter Wanee Hongpraphas, and their son political scientist, social activist, and former senator Kraisak Choonhavan.

[2] Boonruen and all her siblings were sponsored by Princess Srinagarindra and were followers when the Princess and her families traveled to Lausanne, Switzerland by boat from Penang in April 1933 with Princess Galyani Vadhana, King Ananda Mahidol and Prince Bhumibol Adulyadej.

Later, Princess Srinagarindra arranged for her to live with a Swiss family and went on to study at a boarding school for girls.

Boonruen graduated in child-rearing and accompanied Princess Srinagarindra back to Thailand in November 1938 and became a teacher at Laor Uthit Demonstration Kindergarten School Suan Dusit Institution.