In the 18th century, migration was continuous in Nyíregyháza. In addition to the organized settlers from the 1750s, spontaneous arrivals also increased the population, which continued to grow. At the same time, the difficulties of personal prosperity, the hindrance of free religious practice and the promises of new settlements contributed to emigration and onward migration, one of the destinations of which was Bihar County. In accordance with migration, the misinterpreted descriptions of the specialized literature occasionally lead to the drawing of inaccurate conclusions, but the lack of resources does not always allow the exploration of the causes of migration, the knowledge of its course, and the analysis of its consequences. In the 18th century history of Nyíregyháza, it is also an open question why so many people moved to Monospetri in 1794, how they fit in there, why they did not become as dominant in public life as the people from Békés who also came here, and also, who and when returned, and why they did so. An overview of the past of the two settlements by comparing the nomenclature allows interesting conclusions to be drawn, the proof of which, however, requires the discovery of new resources.