Sir Raja Sonam Topgay Dorji CIE (; Wylie transliteration: Stobs-rgyas Rdo-rje; 1896–1953), also called Tobgay, was a member of the Dorji family and Bhutanese politician who served between 1917 and 1952 in the Royal Government under the First and Second Kings of Bhutan. During this period, Topgay Dorji officially held the posts of Gongzim (Chief Minister), Deb Zimpon (Chief Secretary), and Trade Agent to the Government of Bhutan. As such, Topgay Dorji was responsible for fostering Anglo-Bhutanese relations, and later, Bhutan–India relations. Topgay's ties with the west and modernist political factions contributed significantly to the modern political landscape and modernization of Bhutan. Topgay Dorji inherited his positions from his father, Kazi Ugyen Dorji, who was instrumental in advising Ugyen Wangchuck before and after he became the First King of Bhutan. Topgay Dorji lived, worked, and died at Bhutan House, the Dorji's estate in Kalimpong, India, the traditional administrative center of southern Bhutan. Family Topgay was the son of Gongzim Ugyen Dorji, adviser to Gongsar Ugyen Wangchuck both before and after the rise of the latter to the throne. Gongzim Ugyen Dorji had advised the future First King to mediate between the British and Tibet, and later to allow the large-scale induction of Nepalis into Bhutan establishing friendly ties with British India. His paternal aunt was Ayi Thubten Wangmo. Topgay Raja married Princess Mayum Choying Wangmo, the youngest daughter of the Sikkimese Chogyal, at Bhutan House on April 5, 1918. Together they had three sons and two daughters. His eldest son was Jigme Palden Dorji, born in 1919. He went on to become Governor of Haa in 1924, and then to succeed his father as the first Prime Minister of Bhutan. Jigme Palden Dorji was assassinated amid a political struggle between modernist pro-Dorji and monarchist pro-Wangchuck factions. Topgay's second son was named Ugyen, born in 1933. Ugyen was recognized as a renowned lama at Bhutan House as a young boy. This lama was a strong influence in Tibet and Mongolia. He was thereafter called Ugyen Rimpoche, or Boedhay Rimpoche. The youngest son was Lhendup "Lenny" Dorji, born October 6, 1935. Lhendup served briefly as Acting Prime Minister in 1964. That year, he went into voluntary exile in Nepal and later settled at Kalimpong. Topgay's elder daughter Ashi Tashi Dorji served as the Gyaltshab (King's Representative / Regent) of Eastern Bhutan. In 1964, she accompanied Lhendup into voluntary exile, though she returned