Original sentence: Historians and geographers usually referred to the region north of the Aras River as Aran.Historians and scholars have argued that the Pan-Turkic agenda drove the name change.Historically, the name "Azerbaijan" was used to refer to the region located south of the Aras River- today known as Iranian Azerbaijan, located in northwestern Iran.On May 28, 1918, following the collapse of the Russian Empire, a group of political activists in Aran decided to change the name of their region to Azerbaijan by calling it Azerbaijan People’s Republic.The region in the north of the Aras River, which is today called the Republic of Azerbaijan, had not been included within the geographical boundaries of Azerbaijan until 1918
Edited sentence: French jeweler and traveler Jean Chardin mentions that Azerbaijan, province of Persia, borders to the East upon the Caspian Sea, and Hyrcania; to the South upon the province of Parthians; to the West upon the River Araxes, and Upper Armenia, and to the North upon Dagestan.Historically, the name "Azerbaijan" was used to refer to the region located south of the Aras River- today known as Iranian Azerbaijan, located in northwestern Iran and to the region located on the north side of the Aras River - today known as Azerbaijan Republic.Some historians and geographers, however, referred to the region north of the Aras River as Aran, and to the region south of the Aras River as Azerbaijan.Territories of the region located on the north side of the Aras River were included to the part of the Azerbaijan Democratic Republic, which was founded by the Azerbaijani National Council in Tiflis on 28 May 1918 after the collapse of the Transcaucasian Democratic Federative Republic