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FTDNA Y-tree branch

I-BY266

I-BY266 is a branch of the FamilyTreeDNA Y tree with 1,431 kits that gave a country, counting all sub-branches. It is most common in these samples: Sweden (7.6% of kits), Norway (5.4% of kits), Finland (1.1% of kits). The branch's common ancestor lived about 2,000 years ago: the FTDNA Discover estimate runs from 1,800 to 2,400 years ago.

1,431
kits in the branch
with a country given, including all sub-branches
105
on the branch itself
kits whose test did not resolve a sub-branch
22%
Big Y
share of kits with a Big Y test among all kits of the branch, sub-branches included
6
sub-branches
3 with their own page, 3 without
2,000 years
age by Discover
the common ancestor lived 1,800 to 2,400 years ago

Where it is found #

Countries and regions given by the branch's carriers. “Share of branch” is the part of the branch's kits that belongs to the country. “Share of country” is the part of that country's kits that falls into the branch; it is computed only for countries with at least 50 kits.

Where it is found
Country / region kits Share of branch Share of country
Sweden 924 7.6%
Norway 243 5.4%
Finland 114 1.1%
England 37 0.1%
United States 33 0.1%
Russian Federation 19 0.3%
Scotland 13 <0.1%
Ireland 12 <0.1%
United Kingdom 12 0.1%
Denmark 6 0.4%
Estonia 3 1.0%
Germany 3 <0.1%
Northern Ireland 2 <0.1%
Poland 2 <0.1%
Sápmi (Sámi) 2 ·
Iceland 1 0.5%
Isle of Man 1 0.7%
Netherlands 1 <0.1%
Ukraine 1 <0.1%
United States (Native American)United States 1 <0.1%
1 more

The remaining countries and regions (1), 1 kit in total: Wales 1.

YFull

Most common among these peoples #

From YFull samples that gave a mother tongue: the part of a people's samples that falls into this branch. Peoples with at least 3 samples in the branch are listed.

Sub-branches #

Sub-branches that have their own page (50 kits or more). The bar is the kits in the sub-branch with its own sub-branches; the age is when its common ancestor lived.

I-L1302
993 · 69.4% 2,000 years
I-BY232
202 · 14.1% 1,700 years
I-Z2900
127 · 8.9% 1,900 years

3 small sub-branches more without a page: 4 kits. On the branch itself, without a resolved sub-branch: 105 kits.

Surnames #

Surnames that testers entered at FTDNA, over the whole branch with its sub-branches: 34 distinct among 82 kits. FTDNA gives surnames per branch only, with no country attached, so they cannot be split by country.

YFull

The same branch on YFull #

YFull builds its tree from the same SNPs; the node is matched by name or by a shared SNP. TMRCA is when the common ancestor of all samples lived, formed is when the branch split from its parent. Intervals are 95%.

I-Y3657: 401 samples. YFull publishes no age for this branch.

In the site's findings #