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FTDNA Y-tree branch

Haplogroup I-A1355

I-A1355 is a branch of the FamilyTreeDNA Y tree with 54 kits that gave a country, counting all sub-branches. It is most common in these samples: Norway (0.1% of kits), Germany (0.1% of kits), Scotland (0.1% of kits). The branch's common ancestor lived about 2,000 years ago: the FTDNA Discover estimate runs from 1,600 to 2,400 years ago. YFull has 15 samples in this branch and dates its common ancestor to 1,900 years ago.

Belongs to the I-M253 branch, which has a note.

Compare with another branch →

This branch on other trees: FTDNA Discover ↗ · YFull ↗

Branch SNPs: 17 · YFull nodes: 10

A1355, A1345, A1346, A1353, A1356, A1359, A1360, A1362, A1517, A1522, FGC33537, FGC33541, FGC33544, FT219965, FT4153, Y125712, Y167903

The same mutation arose again on other branches: A1517 — R-FT57472

YFull nodes on this branch and their SNPs that FTDNA does not have:

54
kits with a country
sub-branches included; 78 kits in the branch in all, 24 without a country
0
on the branch itself
with a country, the test did not resolve a sub-branch; 0 on the branch itself in all, those without a country included
99%
Big Y
77 of 78: every kit of the branch with sub-branches, those without a country included
2
sub-branches
0 with their own page, 2 without
78
samples at FTDNA Discover
54 with a country; the public tree has 78 kits
2,000 years
age by Discover
the common ancestor lived 1,600 to 2,400 years ago
1,900 years
age by YFull
common ancestor (TMRCA); the branch split from its parent 3,800 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.

Colour is the branch's share of the country's kits. Hover over a country or tap it.
Where it is found
Country / region kits Share of branch Share of country
United States 12 <0.1%
Germany 11 <0.1%
Scotland 8 <0.1%
Norway 6 0.1%
England 4 4 of 27,808
Sweden 4 4 of 12,219
United Kingdom 4 4 of 9,747
Finland 1 1 of 10,189
Ireland 1 1 of 22,312
Italy 1 1 of 6,029
Lithuania 1 1 of 1,866
Northern Ireland 1 1 of 2,982

Sub-branches #

Sub-branches that have their own page (50 kits or more), as a tree: every direct one, nested ones from 1% of the branch's kits. The bar is the kits in the sub-branch with its own sub-branches; the age is when its common ancestor lived.

No sub-branch has its own page: only small branches lie below.

Sub-branches without a page #

Each of these sub-branches has fewer than 50 kits with a country, so none has its own page. Below are all with 5 or more kits, with their age and top countries.

How old the branch is, by source #

Each source's estimate on one scale, in years ago. A dot is the estimate, a bar its spread (a 95% interval for YFull); no bar means the source publishes no spread. The “common ancestor” rows show when the last common ancestor of all carriers lived, the “split” rows when the branch broke off from its parent. Discover does not estimate the split, so its row shows the age of the parent branch itself.

FTDNA Discover common ancestor2,000 years (1,600–2,400)
YFull I-Y13025 common ancestor1,900 years (1,400–2,400) · 15 samples
FTDNA Discover split from the parent2,400 years (2,000–2,900)
YFull I-Y13025 split from the parent3,800 years (3,000–4,600) · 15 samples

How the branch grew #

How many sub-branches already existed at each moment: a sub-branch counts from the time its common ancestor lived (FamilyTreeDNA Discover estimates). Sub-branches with a known age: 34.

0 500 1,000 1,500 1 10

explosive growth: the number of sub-branches doubles in under 400 yearsgrowth: the number doubles in 400–1,500 yearsstagnation: no doubling within 1,500 yearsgrey: fewer than 5 sub-branches at the start of a stretch — too little to tell the rate

Across: years ago; up: number of sub-branches, log scale. The shaded band marks the period when the count multiplied most; the last thousand years are left out.

The branch grew fastest 1,200–1,000 years ago: its sub-branches went from 5 to 6.

Sub-branches of the last centuries show up only where many relatives have tested. So the right end of the curve, red included, says more about who took a test than about population growth.

Surnames #

Surnames that testers entered at FTDNA, over the whole branch with its sub-branches: 5 distinct among 25 kits. FTDNA gives surnames per branch only, with no country attached, so they cannot be split by country.