Wikipedia
Marklo was according to the Vita Lebuini antiqua, an important source for early Saxon history, the tribal capital of the Saxons where they held an annual council to "confirm their laws, give judgment on outstanding cases, and determine by common counsel whether they would go to war or be in peace that year." After the conquest of old Saxony by Charlemagne in 782 the tribal councils of Marklo were abolished.
Marklo has been identified by the anthropologist H. H. Howarth with the village of Markenah in the district of Hoya near Heiligen Ioh, a "sacred wood" and Adelshorn in Lower Saxony.
In 1931 the town of Lohe, changed their name to Marklohe. The speculation was that Lohe had been called Marklo by the pre-Christian Saxons with the name being abbreviated over the centuries. That idea could not be certified.