The Definitive Guide to Türk
Khiva khan Abu al-Ghazi Bahadur wrote in his Chagatai language treatise Shajara-i Tarākima (Genealogy of your Turkmens) that "their chin started to come to be narrow, their eyes began to turn out to be large, their faces started to grow to be modest, and their noses started to turn out to be large' immediately after 5-6 generations". Ottoman histo