Alexander Flora was a son of Jonas Flora and Roosje Kloot.
He married in Rotterdam on 11 July 1900 to Anna Braunberger. The couple had in total 12 children, among them several stillborn and children who died in childhood. Theis son Jacob with his family and their daughter Roosje and her family did not survive the Holocaust. Only one daughter survived the war. She married in 1947 to a son of Levie van Geens and Judith Hart.
Municipality Archive of Rotterdam.
The funeral records at the Jewish cemetery in Rotterdam reveal that Alexander Flora was buried there.