Notable as the founders of Kasikornbank, the extended family owns businesses in the banking and insurance industries.
[1] The Lamsam family traces its roots to Ung Miao Ngian (Chinese: 伍淼源, of the Ng (伍) clan), a Hakka immigrant from Guangdong who moved to Thailand (then known as Siam) during the reign of King Chulalongkorn (Rama V, 1868–1910).
His third son, Ung Yuk Long, inherited the business and led the family's most dominant branch.
[2][3][4][5] The name Lamsam is an alias invented by Ung Miao Ngian, based on an encounter he had back in China.
Ung adopted the name the bandit called him—làm (藍) means 'blue', the colour he was wearing, and sâm might have referred to 衫 'shirt' or 三 'three', for him being the third son—as a token of good fortune, and members of the family from the third generation have used it as their Thai surname.