 Greceanîi was born at Tomsk Oblast in Siberia in the Russian SFSR of the Soviet Union.Her parents, Marioara Ursu (1918–1993) and Petrea Bujor (1906–1996), were deported in 1951 from Cotiujeni in the north of Moldova during the Operation North because they were Jehovah's Witnesses.Her brother died during the deportation.