Question: Early Slavs lived during which time of widespread movements of mainly Germanic peoples?
Context: Germanic toponyms are the names given to places by Germanic peoples and tribes.  Besides areas with current speakers of Germanic languages, many regions with previous Germanic speakers or Germanic influence had or still have Germanic toponymic elements, such as places in Northern France, Wallonia, Poland and Northern Italy. The early Slavs were a diverse group of tribal societies who lived during the Migration Period and Early Middle Ages (approximately the fifth to the tenth centuries) in Eastern Europe and in Central Europe and established the foundations for the Slavic nations through the Slavic states of the High Middle Ages.  The first written use of the name "Slavs" dates to the sixth century, when the Slavic tribes inhabited a large portion of Central and Eastern Europe.  By that century, native Iranian ethnic groups (the Scythians, Sarmatians, and Alans) had been absorbed by the region's Slavic population.  Over the next two centuries, the Slavs expanded southwest toward the Balkans and the Alps and northeast towards the Volga River. The history of the Netherlands is the history of seafaring people thriving on a lowland river delta on the North Sea in northwestern Europe.  Records begin with the four centuries during which the region formed a militarized border zone of the Roman empire.  This came under increasing pressure from Germanic peoples moving westwards.  As Roman power collapsed and the Middle Ages began, three dominant Germanic peoples coalesced in the area, Frisians in the north and coastal areas, Low Saxons in the northeast, and the Franks in the south. The Migration Period was a time of widespread migrations of peoples, mainly Germanic tribes and Huns, within or into Europe in the middle of the first millennium AD.  It has also been termed in English by German loanword Völkerwanderung and—from the Roman and Greek perspective—the Barbarian Invasions.  Many of the migrations were movements of Germanic, Hunnic, Slavic, and other peoples into the territory of the then Roman Empire with or without accompanying invasions or war. In Germanic paganism, the indigenous religion of the ancient Germanic peoples that inhabited Germanic Europe, there were a number of different gods and goddesses.  Germanic deities are attested from numerous sources, including works of literature, various chronicles, runic inscriptions, personal names, place names, and other sources.  This article contains a comprehensive list of Germanic deities outside the numerous Germanic Matres and Matronae inscriptions from the 1st to 5th century CE. The most important phenomenon that took place within the lands of Poland in the Early Middle Ages, as well as other parts of central and eastern Europe, was the arrival and permanent settlement of Slavic peoples.  The Slavic migrations in the area of contemporary Poland started in the second half of the 5th century AD, about a half century after these territories were vacated by Germanic tribes.  The first waves of the incoming Slavs settled the vicinity of the upper Vistula River and elsewhere in the lands of present southeastern Poland and southern Masovia.  Coming from the east, from the upper and middle regions of the Dnieper River, the immigrants would have had come primarily from the western branch of the early Slavs known as Sclaveni, and since their arrival are classified as West Slavs.  Their early archeological traces belong to the Prague-Korchak culture, which is similar to the earlier Kiev culture. Old Norse religion developed from early Germanic religion during the Proto-Norse period, when the North Germanic peoples separated into a distinct branch of the Germanic peoples.  It was displaced by Christianization of the North Germanic peoples.  Scholars reconstruct aspects of North Germanic religion by historical linguistics, archaeology, toponymy, and records left by North Germanic peoples, such as runic inscriptions in the Younger Futhark, a distinctly North Germanic extension of the runic alphabet.  Numerous Old Norse works dated to the 13th century record Norse mythology, a component of North Germanic religion. The culture of Poland is closely connected with its intricate thousand-year history.  Its unique character developed as a result of its geography at the confluence of various European regions.  With origins in the culture of the Early Slavs, over time Polish culture has been profoundly influenced by its interweaving ties with the Germanic, Latinate and Byzantine worlds as well as in continual dialog with the many other ethnic groups and minorities living in Poland.  The people of Poland have traditionally been seen as hospitable to artists from abroad and eager to follow cultural and artistic trends popular in other countries.  In the 19th and 20th centuries the Polish focus on cultural advancement often took precedence over political and economic activity.  These factors have contributed to the versatile nature of Polish art, with all its complex nuances.  Nowadays, Poland is a highly developed country that retains its traditions. The culture of Estonia combines an indigenous heritage, represented by the country's Uralic national language Estonian, with Nordic cultural aspects.  Due to its history and geography, Estonia's culture has been influenced by the traditions of the adjacent area's Baltic Finns, Balts, Germanic peoples and Slavs, as well as by cultural developments in the former dominant powers, Sweden and Russia.  Traditionally, Estonia has been seen as an area of rivalry between western and eastern Europe on many levels.  An example of this geopolitical legacy is an exceptional combination of multiple nationally-recognized Christian traditions: Western Christianity (the Catholic Church and the Estonian Evangelical Lutheran Church) and Eastern Christianity (the Orthodox Church).  The symbolism of the border or meeting of east and west in Estonia was well illustrated on the reverse side of the "5 krooni" note.  Like the mainstream cultures in the other Nordic countries, Estonian culture can be seen to build upon ascetic environmental realities and traditional livelihoods, a heritage of comparatively widespread egalitarianism arising out of practical reasons (see freedom to roam and universal suffrage), and the ideals of closeness to nature and self-sufficiency. Germanic mythology consists of the body of myths native to the Germanic peoples.  Commonly featuring narratives focused on Germanic deities and a large variety of other entities, Germanic mythology dates from the Proto-Germanic period and reaches beyond the Christianization of the Germanic peoples and into modern Germanic folklore.  Germanic mythology includes Norse mythology, Anglo-Saxon mythology, and Continental Germanic mythology.
Answer: Migration Period