DNA tests have confirmed that a 35-year-old Bulgarian Roma woman is the mother of the mysterious girl found in Greece and known only as Maria.
A genetic profile of Sasha Ruseva matched that of the girl.
Ruseva has said she gave birth to a baby girl four years ago while working as an olive picker, but gave her away because she was too poor to care for her.
The mother was living in Greece at the time.
Maria has been placed in temporary care since last week after authorities raided a Roma gypsy settlement in central Greece and discovered her there.
An investigator noticed immediately that she looked nothing like her "parents," and a DNA test quickly confirmed she was not, sparking an international search.
She is not, and it is unclear where she'll go next.
Costas Yannopoulos, director of the Greek children's charity "Smile of the Child" which has been looking after the girl said he had no comment on her fate.
"We are dealing with the humanitarian side of this issue, looking after a young girl," Yannopoulos said of the case that has drawn global attention.
Maria's case has drawn global attention, with the shocking trend of children being stolen from their parents or sold by them now under heightened scrutiny.
The case has also raised concerns of racism toward the European Union's estimated 6 million Gypsies, a minority long marginalized in most of the continent.