Terminology
The term Wallonia can mean slightly different things in different contexts. One of the three federal regions of Belgium is still constitutionally defined as the Walloon Region, but the region's government has renamed it Wallonia, and it is commonly called Wallonia. Preceding April 1, 2010, when the renaming came into effect, Wallonia would sometimes refer to the territory governed by the Walloon Region, whereas Walloon Region referred specifically to the government. In practice, the difference between the different meanings is small, and what is meant is usually clear based on context.
The root of the word Wallonia, like the words Wales, Cornwall and Wallachia, is the Germanic word Walha, meaning the strangers. Wallonia is named after the Walloons, the population of the Burgundian Netherlands speaking Romance languages. In Middle Dutch (and French), the term Walloons also included the French-speaking population of the Prince-Bishopric of Liège or the whole population of the Romanic sprachraum within the medieval Low Countries.
Read more about this topic: Wallonia