Olga Kosakiewicz

Olga Kosakiewicz (Ukrainian: Ольга Козакевич; 6 November 1915 – 1983) was a student of Simone de Beauvoir who joined the circle of de Beauvoir and Jean-Paul Sartre in 1935, aged 19. She and her sister, Wanda, were fused together to make one central character in de Beauvoir's first novel L'Invitée (She Came to Stay, 1943), which was dedicated to Olga (where her name appears as Kosakievicz in the Norton translation).

The Kiev-born Olga, along with Bianca Lamblin and Natalie Sorokin, later stated that their "trio" relationships with Sartre and de Beauvoir damaged them psychologically.

In Sartre's trilogy of novels, Les Chemins de la Liberté (The Roads to Freedom), the character of Ivich is considered a representation of Olga. Deirdre Bair's biography of Simone de Beauvoir examines this relationship. Hazel Rowley also discusses it at length in her book about the relationship between Simone de Beauvoir and Jean-Paul Sartre.

Olga married Jacques-Laurent Bost, a long-time lover of de Beauvoir. She died of tuberculosis in 1983.

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