Original sentence: The Assyrians (also called Syriacs or Chaldeans; see names of Syriac Christians)  are an ethnic group whose origins lie in what is today Iraq, Iran, Turkey and Syria, but many of whom have migrated to the Caucasus, North America and Western Europe during the past century
Edited sentence: The Assyrians, Syriacs and Chaldeans (see names of Syriac Christians)  are an ethnic group whose origins lie in what is today Iraq, Iran, Turkey and Syria, but many of whom have migrated to the Caucasus, North America and Western Europe during the past century