Davis 1970, стр. 227–228: "Kosem was said to have been the daughter of a Greek priest of one of the Aegean islands, probably captured during one of the Ottoman-Venetian maritime campaigns. Her name was Anastasia but was changed after her conversion, no doubt on her admission to the palace, to Mâh-Peyker (Moon-Shaped), and later by Sultan Ahmet to Kosem" Davis, Fanny (1970). The Palace of Topkapi in Istanbul. Scribner. OCLC636864790.
Збаражский, К. (1984). „Донесение о посольстве князя К. Збаражского в Турцию”. Ур.: Ибрагимбейли, Хаджи-Мурат. Османская империя в первой четверти XVII века (на језику: руски). Наука. стр. 211.
Davis 1970, стр. 227–228: "Kosem was said to have been the daughter of a Greek priest of one of the Aegean islands, probably captured during one of the Ottoman-Venetian maritime campaigns. Her name was Anastasia but was changed after her conversion, no doubt on her admission to the palace, to Mâh-Peyker (Moon-Shaped), and later by Sultan Ahmet to Kosem" Davis, Fanny (1970). The Palace of Topkapi in Istanbul. Scribner. OCLC636864790.