RootsChat.Com

General => Ancestral Family Tree DNA Testing => Topic started by: Catservant on Tuesday 16 August 22 16:34 BST (UK)

Title: Surprisingly strong DNA link with Norwegian.
Post by: Catservant on Tuesday 16 August 22 16:34 BST (UK)
Hi. I have no known Norwegian links in my family tree. However I have many Norwegian and Swedish DNA matches.
I have been contacted by a Norwegian with Norwegian family tree asking me if I have Norwegian links.
We share 165.5 cm in 9 segments with the largest being 30.1 cm. This could make us about 2nd cousins which I can’t account for in my tree.
The only uncertain part of my tree is a Cornish illegitimate 4 times great grandfather, born about 1800. He was christened with the middle name Tonsson which sounds Scandinavian to me.
 Is it possible that I could share this much DNA with someone who shares a 5 times great grandfather with me? Otherwise, I presume there is an illegitimate ancestor somewhere in our trees.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: melba_schmelba on Tuesday 16 August 22 16:51 BST (UK)
Hi. I have no known Norwegian links in my family tree. However I have many Norwegian and Swedish DNA matches.
I have been contacted by a Norwegian with Norwegian family tree asking me if I have Norwegian links.
We share 165.5 cm in 9 segments with the largest being 30.1 cm. This could make us about 2nd cousins which I can’t account for in my tree.
The only uncertain part of my tree is a Cornish illegitimate 4 times great grandfather, born about 1800. He was christened with the middle name Tonsson which sounds Scandinavian to me.
 Is it possible that I could share this much DNA with someone who shares a 5 times great grandfather with me? Otherwise, I presume there is an illegitimate ancestor somewhere in our trees.
This wouldn't be with MyHeritage would it ::)?? MyHeritage is somewhat notorious for giving lots, if not, most Brits lots of mysterious Scandinavian relatives who seem to be fairly close...but probably aren't. Possibly to do with imputation they use to match between different chipsets of different companies kits that are uploaded. Someone did a survey of how many matches on MyHeritage might be false, I think below about 24cM, and the % was fairly high (they compared matches of children and parents). Matches with small largest segment below 12cM are probably also dubious.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: Biggles50 on Thursday 18 August 22 14:39 BST (UK)
I would not put a lot of reliance on any ethnicity estimate.

My Heritage DNA test says I have 34.2% Scandinavian ethnicity yet my tree going back 300 years has ZERO ancestors from anywhere other than England, Ireland and Wales with the exception of the line going back from my 2x Great Grandfather who was Italian.  So where the high percentage of Scandinavian comes from in My Heritage is another matter and by comparison my Ancestry DNA test now gives 5% Norwegian.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: Rena on Thursday 18 August 22 14:59 BST (UK)
I haven't taken a DNA test but it seems that the genes are giving credence to our school teacher who taught us about the Vikings (Norwegians and other Scandinavians) invading Britain.

We were taught about King Cnut/Canute turning back the tide.  Additionally the number of Norwegian sailors who married local girls in the port of Hull was quite common according to census that I've seen.

https://en.wikipedia.org/wiki/Cnut
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: Gadget on Thursday 18 August 22 15:03 BST (UK)
I would not put a lot of reliance on any ethnicity estimate.

I've always been sceptical but now I think they're just playing Globle with us!

Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: Stanwix England on Thursday 18 August 22 15:07 BST (UK)
Normally I wouldn't put lots of faith in the ancestry estimates.

However, given that you seem to have lots of DNA matches actually from Norway, that does seem to suggest that there is some truth in the matter, in this particular case.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: melba_schmelba on Thursday 18 August 22 15:12 BST (UK)
Normally I wouldn't put lots of faith in the ancestry estimates.

However, given that you seem to have lots of DNA matches actually from Norway, that does seem to suggest that there is some truth in the matter, in this particular case.
The problem is so does everyone else :D (on MyHeritage), at least Brits and Irish. May be picking up on IBD or IBS segments, or it may be down to imputation causing many false matches. I think the level of false matches that someone found on MyHeritage was about 1/3 below 24cM.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: Rena on Thursday 18 August 22 16:16 BST (UK)

My Heritage DNA test says I have 34.2% Scandinavian ethnicity yet my tree going back 300 years has ZERO ancestors from anywhere other than England, Ireland and Wales with the exception of the line going back from my 2x Great Grandfather who was Italian. 

We've had genes longer than 300 years    ;D ;D ;D ;D

. "The earliest Viking raid on Spain took place in the year 844. A Norse fleet with its blood red sails landed in Galicia after sacking Bordeaux, and proceeded to plunder the coastal villages until they were halted by the troops of King Ramiro I of Asturias near A Coruña on the northwestern coast of Galicia ..."

Those darned Vikings went everywhere - the Arabs wrote that the strangers were as big as trees.  Unbelievably they also landed in the Americas.

I doubt that any young lady was safe when the Viking sailors landed.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: RobertHauteville on Thursday 01 September 22 22:28 BST (UK)
There has been a long trickle of Norwegians "moving south" who mainly settled in the Highlands, over to the west and down. The Dublin Vikings included Norwegians and they raided/settled Wales, Gloucestershire & Cornwall.

Surnames are relatively recent so "Tonsson" may be strong clue. In England and Wales patrynomic names end in "s" whereas in Scotland and Scandinavia they end with "son", i.e.
 
England/Wales : Jones/Johns        Scotland : Johnson
England/Wales : Williams               Scotland : Williamson
England/Wales : Roberts                Scotland : Robertson

If a Norwegian fisherman/sailor/merchant migrated to Scotland they could easily have had a descendant who sailed around the coast to Wales or Cornwall.
 
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: hurworth on Friday 02 September 22 10:35 BST (UK)
I would consider 165cM over 9 segments with the largest segment being 30cM isn't noise or an error.

My initial thoughts are that you have a mystery Norwegian ancestor within the last 2 to 4 generations.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: hurworth on Friday 02 September 22 10:35 BST (UK)
I would consider 165cM over 9 segments with the largest segment being 30cM to be valid - not noise or an error.

My initial thoughts are that you have a mystery Norwegian ancestor within the last 2 to 4 generations.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: hurworth on Friday 02 September 22 10:38 BST (UK)
Has the option to edit (incoherent!!) posts disappeared from the site?
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: bearkat on Friday 02 September 22 10:49 BST (UK)
I would consider 165cM over 9 segments with the largest segment being 30cM isn't noise or an error.

My initial thoughts are that you have a mystery Norwegian ancestor within the last 2 to 4 generations.

I agree.  Build an extensive 4/5 generation tree including all siblings and their descendants.

Check out online trees. Although they are not always accurate, they may be.

Also look at shared matches. Having a Norwegian match who is interested is really helpful as they may be able to help with research over there.

hurworth, I think you can edit posts within 24 hours but not delete them.  You can always ask a moderator for help.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: hurworth on Friday 02 September 22 13:30 BST (UK)

hurworth, I think you can edit posts within 24 hours but not delete them.  You can always ask a moderator for help.

There used to be an edit button, but it's not there at the moment.   

Are you seeing an edit button next to your posts?
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: bearkat on Friday 02 September 22 14:32 BST (UK)
No!
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: bearkat on Friday 02 September 22 14:39 BST (UK)
I can now - odd.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: Maiden Stone on Friday 02 September 22 14:47 BST (UK)

There used to be an edit button, but it's not there at the moment.   

Are you seeing an edit button next to your posts?

It's "Modify". It should be next to "Quote".
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: hurworth on Friday 02 September 22 20:23 BST (UK)

It's "Modify". It should be next to "Quote".

Thank you.  I only have Quote, but not Modify.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: Maiden Stone on Saturday 03 September 22 15:14 BST (UK)

It's "Modify". It should be next to "Quote".

Thank you.  I only have Quote, but not Modify.

 Modify option shows for only 24 hours after posting. It's now gone from my reply #16 which is 24 hrs + 30 mins old. 
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: Catservant on Sunday 04 September 22 16:45 BST (UK)
Thank you everyone for your replies. There is an additional mystery. I share this Norwegian’s DNA with a descendant of my great grandfather’s sister. She shares about 300 cm of DNA with him. This makes me think the shared ancestor of the 3 of us is her great grandparent and my great great grandfather parent. My gg grandparents moved from Somerset to Bristol which is a port city. The Norwegian has one ancestor of about the right age who was a sea captain.
So it seemed very likely to me that we are all descended from the Norwegian Sea captain.
However, there are some spanners in the works. My great grandfather and his sister were born about 8 years apart and other children were born in between. Would my great grandmother who was married really have gone back to the sea captain each time he visited, if indeed he did visit Bristol?
Also, although there appears to be a strong link to my Somerset ancestors via my maternal grandmother’s father, I and the Norwegian share many smaller dna links with my maternal grandmother’s mother’s ancestors in Cornwall.
Could it therefore be just an anomaly that I share more dna with the Norwegian than should be expected and actually he’s a more ancient Cornish link, or both?
Please excuse my convolution.
Title: Re: Surprisingly strong DNA link with Norwegian.
Post by: Deirdre784 on Sunday 04 September 22 17:21 BST (UK)
Not to those extremes but my Ancestry DNA shows 7% Scotland, 3% Sweden and Denmark, and 2% Norway, so that's 12% i have no idea of :(  My 40% Ireland, 27% Wales, and 21% England and NW Europe seems more logical.