Ka cika wannan jumlar: An haifi Ernestina A. López a watan Janairu 1879 a Buenos Aires, Argentina zuwa Cándido da Adriana W. López. Ta fara aikinta na koyarwa kuma ta zama Daraktan Makarantar Misali ta Sarmiento. A cikin 1890, ta kafa Liceo Nacional de Señoritas kuma daga baya ta yi aiki a matsayin shugabanta. A shekara ta 1901, ta sami digiri na farko da aka ba wa mace a cikin haruffa da falsafar daga Jami'ar Buenos Aires kuma a shekara ta 1902 ta shiga wasu mata 31 ciki har da Petrona Eyle, Cecilia Grierson,, 'yar'uwarta Elvira López, Anna Pintos, da Elvira Rawson de Dellepiane don kafa Ƙungiyar Mata ta Jami'ar Argentina (AMUA), a matsayin hanyar magance ra'ayoyin aiki game da mata da mata masu digiri na jami'a. Kungiyar ta yi aiki sosai don samun haƙƙin doka, haƙƙin ɗan ƙasa da na ilimi ga mata. A cikin 1904 López ya halarci
St. Louis World's Fair nuni a matsayin wakilin Argentina don Majalisar Ilimi ta Kasa.