Cheng Yin
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Cheng Yin (程銀) was a general controlling parts of Guanzhong during the Three Kingdoms period of China. He was born in Hedong prefecture (河東) of Sidi commandery (司隷). When Cao Cao invaded Guanzhong, Cheng Yin joined a coalition resisting Cao Cao with Ma Chao, Han Sui, etc. However, the coalition was defeated in the Battle of Tong Pass and he fled to seek refuge under Zhang Lu in Hanzhong. When Zhang Lu surrendered to Cao Cao, Cheng Yin followed.
In the historical fiction Romance of the Three Kingdoms, he was one of the 8 knights serving under Han Sui. He assaulted Chang'an and guarded it from Cao Cao, but was killed when Cao Cao retook the city.