Ahmad ibn Fadlan

Full name: 
Ahmad ibn Fadlān ibn al-Abbās ibn Rāšid ibn Hammād
Arabic name: 
أحمد بن فضلان بن العباس بن راشد بن حماد

Ahmad ibn Fadlan was a writer and traveler. He was sent as the secretary to an ambassador from the Abbasid Caliph al-Muqtadir from Baghdad to the Volga Bulgars by the Black Sea and the Caspian.