Nguyễn Sinh Khiêm (1888–1950), renamed Nguyễn Tất Đạt in accordance with Confucian tradition, was the brother of President Hồ Chí Minh of Việt Nam. Khiêm was a geomancer and traditional herbalist.
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Provides a photo of him, along with his parents and sister. The website also has a little information about him in Vietnamese.