Basically, before c. 2000 BC the haplogroup I-M253 was super rare in whole of Europe, believed to (my bolding):
However in c. 2000 BC (right after the 4.2 kiloyear event), my bolding:While I1 itself is 27,000 years old, it underwent a crash in terms of frequency and subclade diversity to the point where it was almost extinct. This long bottleneck lasted approximately between 25,000 BC and 2600 BC. During the bottleneck event, I1 must have been limited to a remarkably small group of men, perhaps at times even a single man. (source)
As for the originator of the this super-rare lineage, there are two guesses, Elbe river region and Gotland island:Large-scale shifts in genetic ancestry occurred to the west of this “Great Divide”, including an almost complete replacement of hunter-gatherers in Denmark, while no substantial ancestry shifts took place during the same period to the east. This difference is also reflected in genetic relatedness within the populations, decreasing substantially in the west but not in the east where it remained high until c. 4,000 BP; 4) The second major genetic transformation around 5,000 BP happened at a much faster pace with Steppe-related ancestry reaching most parts of Europe within 1,000-years [by 2000 BC]. (2022 study)
LNBA phase III: a final stage from around 4,000 cal. bp [2000 BC] onwards, in which a distinct cluster of Scandinavian individuals dominated by males with I1 Y-haplogroups appears (Extended Data Fig. 8e). Y chromosome haplogroup I1 is one of the dominant haplogroups in present-day Scandinavians, and we here document its earliest occurrence in an approximately 4,000-year-old individual from Falköping in southern Sweden (NEO220). The rapid increase in frequency of this haplogroup and associated genome-wide ancestry coincides with increase in human mobility seen in Swedish Sr isotope data, suggesting an influx of people from eastern or northeastern regions of Scandinavia, and the emergence of stone cist burials in Southern Sweden, which were also introduced in eastern Denmark during that period. (2024 study)
In likes of Bock saga and Gutasaga the Gotland island is specifically mentioned as the island from where the Nordic peoples sprung from. Anyone even remotely familiar with Oera Linda book, Frá Fornjóti and Fundinn Noregr narratives on c. 2000 BC domino effect of Eurasian invaders pushing Finns west via Kainuu and Finnmark regions to conquer Scandinavia - of which lineages come all the later Norse saga kings, who would in turn have bred further socially downward (as detailed in Bock saga and in allegorical form in Rígsþula) and geographically outward - to which effect Wodin organizes his war campaign to counter all that, finally ending with having a child with the Finnish princess.in 2009 wrote in a personal message: "We don't know where that man existed, but the greater lower Elbe basin seems like the heartland of I1". [...] Since the most up-to date calculated estimation of TMRCA of I1 is thought to be around 2600 BC, this likely puts the ancestor of all living I1 men somewhere in Northern Europe around that time. The phylogeny of I1 shows the signature of a rapid star-like expansion. This suggests that I1 went from being a rare marker to a rather common one in a rapid burst. (source)
However, the single I1/pre-I1 sample found on Mesolithic Gotland may or may not have been the progenitor of later I1 lineages [...] So far, the only pre-I1/I-Z2699* found anywhere in Northern Europe is the Mesolithic [10,000-3000 BC] Scandinavian-Hunter-Gatherer sample SF11 (Stora Förvar 11) from what is now Gotland in Sweden. (source)
To get a more reliable snapshot, Skoglund and his colleagues sequenced almost 250 million base pairs from the skeletal remains of four individuals: Gök4 and three [3000 BC] hunter-gatherers from around the same period, whose burial sites were located less than 400 kilometres from Västergötland, on the island of Gotland. The hunter-gatherers show the greatest similarity to modern-day Finns, says Skoglund. (source)
- map.jpg (190.79 KiB) Viewed 80 times
In this above light, it seems that the Norse sagas and Dutch Oera Linda book all retained an actual oral and textual memory of the 2000 BC movement of peoples in Fennoscandia. No mid-1800s alleged Dutch forger would have known this actual genetic movement of peoples.