Zena, Oregon (according to Oregon Geographic Names by Lewis MacArthur, Fifth ed., 1982) Zena, Polk County. Zena is a community in the southeastern part of Eola Hills. It was named fro Arvazena Cooper, wife of Daniel Jackson Cooper. The Coopers moved to this place in 1863 and lived there until 1875 when they moved to Salem. Mrs. Cooper was living in The Dalles in 1927. This information was furnished by Norman Cooper of The Dalles, a son of D. J. Cooper. Hope this helps.