Old Frisian āthorpā, ātherpā or āwirā. See: Altfriesisches Wƶrterbuch, pp. 1076. In modern Fries and the Groninger dialect, the words āterpā and āwierdā mean: an inhabited artificial hill or mound. See: Historical Dictionaries.
Many terpen are located in the northern Netherlands and existed as early as the Middle Ages. Many still exist to this day, with one building or sometimes holding a whole village. More about the remarkable history of these mounds can be found on this web site (also available in English): Terpenwiederenland.
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