FTDNA Y-tree branch

Haplogroup R-CTS9551

R-CTS9551 is a branch of the FamilyTreeDNA Y tree with 50 kits that gave a country, counting all sub-branches. It is most common in these samples: Russian Federation (0.2% of kits), Ukraine (0.1% of kits), Finland (0.1% of kits). The branch's common ancestor lived about 3,800 years ago: the FTDNA Discover estimate runs from 3,200 to 4,600 years ago. YFull has 39 samples in this branch and dates its common ancestor to 3,600 years ago.

Belongs to the R-Z280 branch, which has a note.

Compare with another branch →

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

Branch SNPs: 1 · 82 more at YFull

CTS9551

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

R-FT300000 · R-YP5617 · 3 samples
FT302639, FT301661, FT301339, FT302961, FT300581, FT300000
R-Y301127 · R-FTA87738 · 3 samples
Y301137, FTA88378, FTA95460, Y301134, Y301133, FTA88695, FTA88836, Y301131, FTA89246, FTA89408, Y301128, Y301127, FTA89819, FTA89838, FTA98037, Y301135, Y301130, Y301129, FTA96201, Y301132, Y76216
R-FTC19134 · R-FTC19134 · 2 samples
MF20160/MF792646
R-Y301126 · R-FT136375 · 2 samples
Y301126
R-CTS11505 · R-S3350 · 1 sample
BY227748
R-FGC45993 · R-FGC45993 · 1 sample
FGC45983
R-FGC46016 · R-FGC46016 · 1 sample
Y553685(H)
R-Y207197 · R-Y207197 · 1 sample
Y126644
R-Y464429 · R-YP5617 · 1 sample
Y464429, Y464430, Y464432, Y464434, Y464435, MF4388, Y464431, Y464433, MF631115/Y254078
R-YP4364 · R-YP4364 · 1 sample
YP4359, YP4381
R-CTS9551
Y647920(H), Y617941(H)
R-YP5611 · R-YP5617
Y553630, Y581495, Y553653(H), Y553646, Y647919(H), Y553635(H), BY15226, Y581494, Y515977
and 18 more

kits with a country

sub-branches included; 119 kits in the branch in all, 69 without a country

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

41%

Big Y

49 of 119: every kit of the branch with sub-branches, those without a country included

sub-branches

0 with their own page, 2 without

122

samples at FTDNA Discover

53 with a country; the public tree has 119 kits

3,800 years

age by Discover

the common ancestor lived 3,200 to 4,600 years ago

3,600 years

age by YFull

common ancestor (TMRCA); the branch split from its parent 4,400 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.

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
Russian Federation	16	32.0%	0.2%
Finland	9	18.0%	<0.1%
Ukraine	5	10.0%	0.1%
Latvia	4	8.0%	4 of 456
Sweden	4	8.0%	4 of 12,219
Russia (Republic of Chuvashia)Russian Federation	3	6.0%	3 of 216
Belarus	2	4.0%	2 of 1,718
Estonia	2	4.0%	2 of 292
Poland	2	4.0%	2 of 7,394
Russia (Republic of Karelia)Russian Federation	2	4.0%	2 of 110
Admiralty Islands	1	2.0%	·

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. The list has peoples with at least 30 samples, 3 or more of them in this branch.

Russians: 1.2% of samples (10 of 839)

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.

R-CTS214 30 kits 2,600 years Russian Federation 9, Finland 8, Sweden 4
R-CTS5149 18 kits 2,300 years Russian Federation 6, Finland 5, Sweden 3
R-S3350 7 kits 1,100 years Finland 4, Sweden 3
R-FT20231 6 kits 900 years Finland 4, Sweden 2
R-BY30790 6 kits 1,500 years Russian Federation 4, Belarus 1, Russia (Republic of Karelia) 1
R-BY30791 6 kits 1,500 years Russian Federation 4, Belarus 1, Russia (Republic of Karelia) 1
R-YP5617 20 kits 2,300 years Russian Federation 7, Latvia 4, Ukraine 4
R-FGC46016 11 kits 1,800 years Russian Federation 5, Ukraine 3, Belarus 1
R-FGC45993 7 kits 1,600 years Russian Federation 2, Ukraine 2, Belarus 1
R-BY15227 8 kits 1,600 years Latvia 4, Poland 2, Russian Federation 1
R-FT387536 5 kits 1,000 years Latvia 4, Russian Federation 1

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 ancestor3,800 years (3,200–4,600)

YFull common ancestor3,600 years (2,900–4,300) · 39 samples

FTDNA Discover split from the parent3,900 years (3,300–4,700)

YFull split from the parent4,400 years (3,500–5,400) · 39 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: 28.

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 1,500–1,000 years ago: its sub-branches went from 10 to 17.

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

New this month #

FTDNA: how much the kit count grew between the tree copies of 2026-10-02 and 2026-11-02. A kit that moved to a new sub-branch after refinement is not counted as new. YFull: samples YFull itself marks as new, in the copy of 2026-11-02; YFull drops the mark after a few weeks.

Y-DNA, FTDNA

new kits, 2026-10-02 → 2026-11-02

Y-DNA, YFull

new samples as of 2026-11-02

Where it grew

Latvia: +1

New Y-DNA samples in YFull

R-FTG57893 · Tul'skaya oblast' · Russians

Surnames #

Surnames that testers entered at FTDNA, over the whole branch with its sub-branches: 1 distinct among 3 kits. FTDNA gives surnames per branch only, with no country attached, so they cannot be split by country.

Klimanis 3

Ancient samples in the branch #

1 sample from excavations belong to this branch or its subbranches. Source: FamilyTreeDNA Discover. “?” means Discover is unsure of the sample's place on the tree. 1 of 1 samples are marked.

Where found

Sweden 1 list

The oldest

1,676 CE · Historical Swedish, Sweden R-FGC45993 ?