Writing on Islam's claim of Abrahamic ancestry, John explained that the Arabs were called "Saracens" (Greek Σαρακενοί, Sarakenoi) because they were "empty" (κενός, kenos, in Greek) "of Sarah".
Duke shkruar në lidhje me kërkesën e Islamit për prejardhjen abrahamike, Gjoni shpjegoi se arabët quheshin "Saraçenët" (greqisht Σαρακενοί, Sarakenoi), se ishin "bosh" (κενός, kenos, në greqisht).