Ibn al-Nadim
Aliyev states that medieval Muslim historians like al-Baladhuri, al-Masudi, ibn Hawqal and Yaqut al-Hamawi mentioned this language by name. Other such writers are Estakhri, Ibn al-Nadim, Hamza al-Isfahani, al-Muqaddasi, Ya'qubi, Hamdallah Mustawfi and Muhammad ibn Musa al-Khwarizmi.