Yesterday I have discovered that we had very rich Viking-Polish Realtions.
I just wanted to put all articles in one place ...
http://czytelnia.onet.pl/0,1091032,do_czytania.html (in Polish)
http://www.jomsborg.pl/korzenie_en.htmlthere were good times
Olav Tryggvason's Saga says like that about Jomsvikings' campaign to Norway: "They had 20 ships from Skania [souther Sweden] and 40 ships from Vendland [Pomerania and Poland]. The king of Vendland was in this time Burisleif" (Boleslaw the Brave of Poland). Saga says Boleslaw was the father-in-law as well Sigvald, the jarl of Jomsvikings, as Sven Forkbeard - the king of Denmark and later conqueror of England - and the most famous of them, Olav Tryggvason, the king of Norway. According to Saga, Olav has spent 3 years in Poland (with his father-in-law, Boleslaw) and had there a lot of friends.
That's how the Jomsvikings legend grew up.
Some of the Danish islands were attacked by Slavic pirates so often, that they have been depopulated at the end; later they have been settled again by Slavs from Pomerania. Danish invasions (with distinctly repressive character), like this from year 1043, shows that Vends (Slavs) were not easy neighbours for the Vikings; at the same time, when Scandinavian Vikings pillaged the West Europe, they own territory was pillaged by Vends.
In the book The Viking Art Of War (Chapter 'The Vikings and their neighbours), Paddy Griffith writes:
"To the south-east of Denmark lay the Wends (Vends) or the Slav tribes, who were in many ways just as effective raiders and traders as the Vikings themselves".
"The Slavs were always under threat of attack from the Vikings as well as the Franks."
"They also gave as good as they got , in military terms, sacking Hedeby in 1000 and harrying Denmark, Gotland , Oland and southern Sweden to such an extent that the Western Baltic was sometimes called Mare Rugianorum after the Slavic pirates of Rugen. The prevalence of treasure-hoarding in southern Sweden during the 1000s has led modern archeologists to believe that the threat was indeed a very serious one, and the Icelandic sagas themselves often seem to assume that "Vikings" in the purely piratical sense were almost as likely to be Wends (Vends) as Scandinavians."
According to our present knowlage, we can suppose that the team of pirates from Jomsborg was mixed, Slavic - Scandinavian, but after 1000 the Slavic element among the Jomsvikings was in majority.
Olaf Tryggvason's Saga says also, that Olav's father-in-law, Burisleif, has take a part in compaign of emperor Otton agains Danes and took part in battles near Danevirke. In this expedition was with him Olaf, his son-in-law. If it was a true, name "Burisleif " define rather Mieszko (Mieczyslaw) - father of Boleslaw, because he took part in this compaign with Otton. Because Jomsvikingasaga and Olav Tryggvason's Saga were written down in XII/XIII century, true and legend are mixed together. At this time, scandinavian vikings weren't so strong anymore, and the main centre of piracy at Baltic Sea were slavian sea-shores (including Wolin).
All of that, act on an imagination of Icelandic writers.

when we look on R1A distribution ... it can be true that some Slavic tribes (Weneds Pomeranians, Kasuhubians) participated in some Viking "European trips" we all know how Vikings trips looked ... some famous nooble Scotish families are R1A ... So we have more "realtives than we thought ... ;-)
Haplogroup R1a - The R1a lineage is believed to have originated in the Eurasian Steppes north of the Black & Caspian Seas. This lineage is thought to descend from a population of the Kurgan culture, known for the domestication of the horse (circa 3000 B.C.E.). These people were also believed to be the first speakers of the Indo-European language group. This lineage is found in central & western Asia, India, and in Slavic populations of Europe.1 Haplogroup R1a also appears in Scotland, and is the haplogroup of the great Gaelic warrior, Somerled.

I have some interesting Videos about some "Slavic" - "Vikings" traditions or legends in Poland.
Viking Festival in Wolin (where Polson goes this year)
I am not expert in issue of Slavic - Viking contacts but when we look on information we have, it look much different than I thought it was.
btw it is possible that some of our ancestors joined Vikings in their trips ;) just look on our hooligans ;)