The surnames Merenlender / Märenlender means "from Moravia". Moravia, a region in the south-east of nowadays Czech Republic, is called 'Mähren' in the German language.
Moravia (Czech: Morava; German: Mähren (help·info); Silesian: Morawijo; Polish: Morawy) is a historical region in Central Europe in the east of the Czech Republic, together with Bohemia and Silesia one of the former Czech lands. It takes its name from the Morava River which rises in the northwest of the region. Moravia's largest cities is Brno, its also historical capital.
Moravia-Silesia within Czechoslovakia between 1928–1938 Moravia occupies most of the eastern part of the Czech Republic including the South Moravian Region and the Zlín Region, as well as parts of the Moravian-Silesian, Olomouc, Pardubice, Vysočina and South Bohemian regions. Moravia borders Poland in the north, Czech Silesia in the east, Slovakia in the southeast, Lower Austria in the south and Bohemia in the west. Its northern boundary is formed by the Sudetes mountains which become the Carpathians in the east. The meandering Dyje flows through the border country with Austria and there is a protected area on both sides of the border in the area around Hardegg. At the heart of the country lie the sedimentary basins of the Morava and the Dyje at a height of 180 to 250 m. In the west, the Bohemian-Moravian highlands rise to over 800 m, although the highest mountain is in the north-west, Praděd in Hrubý Jeseník at 1490 m. Further south lie the Jeseníky lowlands (400 to 600 m) which fall to 310 m at the upper reaches of the River Oder (the Moravian Gate) near Hranice and then rise again as the Beskids to the 1322 m high Lysá hora. These three mountain ranges plus the "gate" between the latter two form part of the European Watershed. Moravia's eastern boundary is formed by the White Carpathians and Javorníky. Between 1782–1850, Moravia (also thus known as Moravia-Silesia) also included a small portion of the former province of Silesia – the Austrian Silesia (when Frederick the Great annexed most of ancient Silesia (the land of upper and middle Oder river) to Prussia, Silesia's southernmost part remained with the Habsburgs).