Gautama Siddha

Gautama Siddha, astronomer, astrologer and compiler of Indian descent, known for leading the compilation of the Treatise on Astrology of the Kaiyuan Era during the Tang dynasty. He was born in Chang'an, and his family was originally from India, according to a tomb stele uncovered in 1977 in Xi'an. The Gautama family had lived in China for multiple generations, ever since his great-grandfather immigrated to China from India. He was most notable for his translation of Navagraha calendar into Chinese.