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Books about Mahfiruz:
Meleksah ile GulluhanveRazinihan ile Mahfiruz by Ismail Buyuktas (1998)
Wiki information Mahfiruz:
Mahfiruz Hatice Sultan was a wife of Ottoman Sultan Ahmed I. She was the mother of Osman II, Şehzade Huseyn, Şehzade Bayezid and Şehzade Mehmed and was valide sultan from 26 February 1618 until her death on 26 October 1620.