It is said that Rurik came from the other side of the Baltic, from what is Sweden today. But when Rurik lived, Sweden did not exist and it would take several hundred years before Svear had reached Mälaren, Uppland, Roslagen, ie areas that Rurik believed to be from. So this is not likely. In all excavations made in Old Uppsala and Birka, finds are found from Finnish people. Finnish people were spread all over the Nordic countries before Sweden and Norway were formed.
Similarly, Rurik's genetic heritage, N1c1, is typical of Finnish people. Even today, many Russian men have this legacy, N, from the former Finnish people who inhabited Russia's entire day before the Slavic people came to the area.
Likewise in Sweden above Mälaren, as in northern Norway. So probably the Finnish people rowed across the sea between today's Sweden, Finland, Estonia, Russia.
In the past, it was home to Finnish people on both sides of the sea.
https://mapsontheweb.zoom-maps.com/image/161313174104
From excavations in Old Uppsala:
The fennobaltic ceramics come from southwestern Finland and northern Estonia in the area of the Gulf of Finland, and are found mainly in graves in this area. The term fennobaltically is due to the fact that the language of the speech is based on a Southern Finnish-northern Balkan tradition, which also occurs in western Russia where Finnish-Ugrian people lived.
The fact that ceramics are found here does not mean that it is imported from the area east of the Baltic Sea. It may also indicate that people from the East lived in Old Uppsala and made local-based pottery with fennobaltic and Russian-Baltic design.
The analysis has shown that the most characteristic shards of fennobaltic and Russian-Baltic ceramics are made in Old Uppsala by local clay. This means that people with knowledge of this tradition have worked right here. It may have been a Finns who sat in Old Uppsala and made the ceramics.
Thanks to the ceramics you can see traces of ancient networks.
"You should probably see Uppland, Åland, the Baltic and Russia as belonging to the same overall culture sphere," says Tomas Westberg.
During the Viking Age, there were Baltic-Finnish people in the above area.(my comment)
http://extra.lansstyrelsen.se/arkeologigamlauppsala/Sv/nyheter/2016...
Likewise, it appeared to have been on the island of Birka in Mälaren, todays Sweden:
A large proportion of objects from the mainland of Finland were also found in chamber cravings. This grave type has been considered to be associated with an elite of warriors and traders with long-distance contacts. Some of the tombs of graves with objects from the Finnish peninsula are also among the most rich in Birka. Based on this, it may be reasonable to assume that people in the city elite were part of a network and had direct or indirect contacts with groups in the mainland of Finland.
The chamber grave is one of the island's premier bargains and it was dug out in the 19th century by archaeologist Hjalmar Stolpe, who also made extensive drawings of the find.
There he found a lot of valuable grave gifts; including weapons like swords, arrows, shields and remains of spears. In the chamber were also the remains of two horses and the skeleton of a human being, based on where the mighty person was buried there. To be completely safe on the sex of the skeleton, scientists allowed a DNA survey. At the same time, isotopes were also taken to try to track her origins.
And according to Maja Krzewinska at the Archeological Research Laboratory in Stockholm, who did the tests, the case is ready:
"There is no doubt whatsoever. This is a woman, she says.
What would be your best guess about where she came from?
"I think she was part of the traveling Viking-day ruler class, affiliated with both the Baltic and the Atlantic coast.”
https://www.svt.se/nyheter/vetenskap/framsta-vikingakrigaren-var-kv...
http://portal.research.lu.se/ws/files/5564707/3461316.pdf
So, given the new findings that archaeologists now have, Rurik is likely to be of Finnish descent.