Thomas A. Carlson (ed.), "Sūdān" in last modified August 9, 2017, http://syriaca.org/place/2948 Sūdān السودان The region of sub-Saharan Africa Attestation of name السودان in the Kitāb al-aʿlāq al-nafīsa of Aḥmad ibn ʿUmar Ibn Rustah. http://syriaca.org/place/2948 https://en.wikipedia.org/wiki/Sudan_(region) https://dbpedia.org/resource/Sudan_(region) Kitāb al-aʿlāq al-nafīsa Aḥmad ibn ʿUmar Ibn Rustah 88