This led to the differentiation between Lower Saxony (lands settled by the Saxon tribe) and Upper Saxony (the lands belonging to the House of Wettin). Gradually, the latter region became known as "Saxony", ultimately usurping the name's original geographical meaning. The area formerly known as Upper Saxony now lies in Central Germany - in the eastern part of the present-day Federal Republic of Germany: note the names of the federal states of Saxony and Saxony-Anhalt.