Born in the Russian Empire, as the fourth child and youngest daughter of Jewish financier Grigori Benenson (1860–1939) and Sophie Goldberg (1862–1926), she migrated in 1914 with her family to London from Germany, where they had been visiting. She had three siblings, an older brother Jacob who died in a German concentration camp during the First World War, and two sisters, Flora Solomon and Fira Benenson (Countess Ilinska) who became a leading American dress designer.[2]
In Paris in 1925 Manya Benenson married Ralph Andrew Harari (1893–1969), a merchant banker, art scholar and collector, son of Sir Victor Harari Pasha and Emma Aghion, leading members of Egypt's Anglo-Jewish community.[1] They had met in Palestine earlier that year. They initially lived in Cairo where Manya studied the poor living conditions. In 1932, she converted to Roman Catholicism.[1]
The couple later settled in London and were known their hospitality at their London home 32 Catherine Place, Westminster. The couple had one son, Michael Harari, born in England in 1928, who later became a psychiatrist.[3]
Manya Harari died on 24 September 1969 and was buried with her husband at East Finchley Cemetery and Crematorium.[4][5]