Kammala wannan jumla: An haifi Maria Kuncewiczowa a ranar 30 ga Oktoba, 1895 a Samara, Daular Rasha. Iyayenta sun yi gudun hijira zuwa Rasha don shiga cikin
Janairu 1863 Tashin hankali na Poland, kuma dangin sun koma Warsaw lokacin da take 'yar shekara 2. Iyayenta sun kasance mambobi ne na rukunin masu ilimi na Poland, ko kuma talakawa masu ilimi. Mahaifiyarta mawaƙa ce wacce ta bar aikinta don haɓaka iyali, wanda shine wani abu da ya jawo Kuncewiczowa zuwa kiɗa a farkon rayuwarta. Ta yi karatun kiɗa da adabi a Kraków, Warsaw da Paris kafin ta zaɓi aikin adabi.