In 1882, she married lawyer Francisc Hossu-Longin.
Pop-Hossu-Longin was a leading figure of the Romanian women's movement and engaged in the struggle for equal rights between men and women, particularly in regards to education. She was co-founder of Reuniunea Femeilor Române Sălăjene (Union of Romanian Women of Sălaj) in 1880, co-founder of Reuniunea Femeilor Române Hunedorene (Union of Romanian Women of Hunedoara) in 1886 and its president from 1895 to 1918.
- Francisca de Haan, Krasimira Daskalova & Anna Loutfi: Biographical Dictionary of Women's Movements and Feminisms in Central, Easterna and South Eastern Europe, 19th and 20th centuries. Central European University Press, 2006
- George Marcu (coord.), Dicţionarul personalităţilor feminine din România, Editura Meronia, București, 2009.