Turkish historian Faruk Sümer proposed that he was of the Sunud tribe and Sutai was just an abbreviation for Sunitai (Mongolian: Сөнөд + ай, lit. 'Belonging to Sunud').[1] Ishayahu Landa too believes that Sutay was a member of the Sunud.[2] According to Mamluk historian Al-Safadi, he took part in Siege of Baghdad and was over 100 years old when he died in 1332.[3] But Faruk Sümer doubted that and proposed that Mamluk historians mistook him for Chagatay the Younger otherwise known as Sunitai - an emir from the Sunud tribe and Hulagu's mingghan commander.[4]