The Ratzeburger Zehntregister (that is, the Ratzeburg tithe register) comes to us from the year 1230. It contains a list of possessions of the bishopric of Ratzeburg around Mecklenburg, Lauenburg and, interestingly, also Holstein. Many of these are mentioned for the first time. It is currently found in Landeshauptarchiv Schwerin. Over time it has been reproduced in the Mecklenburgischen Urkundenbuch.

Fascinatingly, this register caused a minor scandal when it was used by Dmitri Nikolajewitsch Jegorow to publish “Die Kolonisation Mecklenburgs im 13. Jahrhundert” (2 Bände, Breslau 1930) which essentially argued that most of the colonization of these areas was done by Suavic settlers.

The list of towns from the register is below. The Suavic names are in red although the list as usual may be both under and over inclusive. They constitute roughly half of the names on the list. This is certainly curious as the year 1230 was 600 years after the initial wars of the Franks with the Suavs of Samo. Beyond that the list comes from Wikipedia and I retained the rather inconsistent numbering system they have there (not sure what the original source for that system is but it is probably not Wikipedia).