Analysis of information sources in references of the Wikipedia article "Zanj" in English language version.
ancient Arabic geography had quite a fixed pattern in listing the countries from the Red Sea to the Indian Ocean: These are al-Misr (Egypt)—al-Muqurra (or other designations for Nubian kingdoms)—Zanj (Azania, i.e. the country of the "blacks"). Correspondingly almost all these terms (or as I believe: all of them!) also appear in ancient and medieval Chinese geography.
ancient Arabic geography had quite a fixed pattern in listing the countries from the Red Sea to the Indian Ocean: These are al-Misr (Egypt)—al-Muqurra (or other designations for Nubian kingdoms)—Zanj (Azania, i.e. the country of the "blacks"). Correspondingly almost all these terms (or as I believe: all of them!) also appear in ancient and medieval Chinese geography.