YANKEV SHEYN (1848-June 1913)
He was born in Eperies (Eperjes), Hungary, and immigrated to the United States in 1879. He was active in the socialist fraternal movement. He was said to have published the first socialist writing in Yiddish in America in 1885, which until now has yet to be located. He died in New York.
Source: Elye Tsherikover, ed., Geshikhte fun der yidisher arbeter-bavegung in di fareynikte shtatn (The history of the Jewish labor movement in the United States), vol. 2 (New York: YIVO, 1945), pp. 251, 485.