Gouel, a.k.a. Marcelle Humbert, was Picasso
's lover after his relationship with Fernande Olivier and before Olga Kokhlova, during the years 1911-1915. It is said that Picasso gave her the name "Eva" to signify that she was the first he loved (Eva = Eve). She tragically died in 1915, due either to tuberculosis
There are not many photographics of Eva nor many portraits Picasso painted of her. This was during the time of his analytic cubist
phase, and the most famous painting dedicated to Eva was called "Ma Jolie", a cubist composition.