The Lusitanians were an Indo-European-speaking people living in the far west of the Iberian Peninsula, in present-day central Portugal and the regions of Extremadura and Castilla y León of Spain. It is uncertain whether the Lusitanians were Celts or Celticized Iberians, related to the Lusones. After its conquest by the Romans, the land was subsequently incorporated as a Roman province named after them (Lusitania).