Could my tests be wrong?

[junior]

Hello,

I got my autosomal DNA test results yesterday and found something that I wasn't expecting:

https://scontent-a-atl.xx.fbcdn.net/...63741293_o.jpg

All my known relatives are Portuguese descent and I know one of them could also be African, because of the way my mom describe her appearance. I also know I have some native American genes. Everything showed on the test, and that wasn't very surprising.

It is nice to have a percentage breakdown, but the only problem with my result is that I am 7% Scandinavian. There have been a Scandinavian immigration in Brazil, but it is not mentioned in books or school. The only article I found was in English, and it says around 800,000 - 1M Brazilians are Scandinavian descent, and most of the Scandinavians went exactly to my region (northeastern Brazil), specifically to the state of Ceará (my state) and Rio Grande do Norte.

http://en.wikipedia.org/wiki/Scandinavian_Brazilian

I was expecting my tests to show some Dutch, but it didn't happen. I will order a test for my parents and siblings, to clear somethings out, but I wonder if this 7% Scandinavian could be something else. The tests show that I am more Scandinavian than Native American, and that was a bit surprising, and it's probably not right.

Here is my Ethnic Makeup:

77% European
- 70% Southern Europe
- 7% Scandinavia
10% African
- 9% West Africa
- 1% East Central Africa
6% New World
- 6% Native American
5% Middle Eastern
- 4% North Africa
- 1% Eastern Middle East
2% East Asian
- 2% Northeast Asia

And here are my gedmatch (eurogene k13) results:

North_Atlantic 28.16% (where exctly is that?)
Baltic 9.22%
West_Med 21.40%
West_Asian 4.14%
East_Med 10.63%
Red_Sea 4.04%
South_Asian 0.12%
Siberian 0.43%
Amerindian 9.25%
Oceanian 0.54% (I doubt it)
Northeast_African 2.55%
Sub-Saharan 9.52%

Can anyone give me any additional information on what could have happened? It's not that we don't have Scandinavian phenotype (because we do), it's just that it's unknown to us.

[rmm0484]

I am speculating at this point, but the scandinavian admixture may have happened in Portugal or North Africa. The vikings really got around.
See http://en.wikipedia.org/wiki/Viking_expansion

[Hneel]

You should take this result with a big grain of salt.

For example, my results were:
40% British Isles
39% Scandinavia
19% Southern Europe
1% Finland and Northern Siberia

I am native dutch, so I might expect mostly Western Europe.

[junior]

Thank you so much guys, this is exactly what I needed!

[junior]

I found many 4th-5th cousins in Finland on GedMatch. The Scandinavian results might actually be true.

[junior]

Here's the answer I got from FamilyTreeDNA:

"Dear Edvaldo Moreira dos Santos Junior,
Thank you for your email and I apologize for the delay in my reply. The Scandinavian reference population could indeed indicate Dutch ancestry, there is not a specific reference population that would show only Such ancestry, it would either be included in Scandinavian, Central Europe, or British Isles. Due to the migration through that area we see a mixture of ancestry, so my best guess would be this Scandinavian ancestry would be reflecting your Dutch ancestry.
Regarding the Euroegenes interpretation I am not certain what North Atlantic may refer to, maybe Northern European? I am not certain if gedmatch has an explanation as to what the different reference populations are."