FTDNA Y-tree branch

R-L23 R1b-L23

R-L23 is a branch of the FamilyTreeDNA Y tree with 104,287 kits that gave a country, counting all sub-branches. It is most common in these samples: Ireland (78% of kits), England (Cornish) (76% of kits), Northern Ireland (74% of kits). The branch's common ancestor lived about 6,400 years ago: the FTDNA Discover estimate runs from 5,600 to 7,300 years ago. YFull has 10,860 samples in this branch and dates its common ancestor to 6,100 years ago.

104,287

kits in the branch

with a country given, including all sub-branches

289

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

sub-branches

2 with their own page, 0 without

6,400 years

age by Discover

the common ancestor lived 5,600 to 7,300 years ago

6,100 years

age by YFull

common ancestor (TMRCA); the branch split from its parent 6,400 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
United States	18,677	17.9%	61%
Ireland	17,360	16.6%	78%
England	15,771	15.1%	57%
Scotland	9,576	9.2%	68%
Germany	6,887	6.6%	39%
United Kingdom	5,568	5.3%	57%
France	3,854	3.7%	60%
Sweden	2,488	2.4%	20%
Northern Ireland	2,199	2.1%	74%
Spain	1,838	1.8%	47%
Italy	1,691	1.6%	28%
Wales	1,490	1.4%	68%
Switzerland	1,389	1.3%	47%
Norway	1,212	1.2%	27%
Netherlands	1,115	1.1%	48%
Canada	1,078	1.0%	65%
Portugal	944	0.9%	50%
Poland	914	0.9%	12%
Mexico	778	0.7%	34%
United States (Native American)United States	618	0.6%	34%

191 more

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.

Montenegrins: 50% of samples (14 of 28)
Catalans: 50% of samples (10 of 20)
French: 46% of samples (57 of 124)
English: 42% of samples (440 of 1,050)
Spaniards: 40% of samples (47 of 118)
Portuguese: 38% of samples (32 of 84)
Armenians: 37% of samples (22 of 59)
Italians: 36% of samples (21 of 59)

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.

R1b-L51 R-L51

100,832 · 96.7% 6,100 years

R1b-Z2103 (M12149) R-M12149

3,166 · 3.0% 5,700 years

On the branch itself, without a resolved sub-branch: 289 kits.

Surnames #

Surnames that testers entered at FTDNA, over the whole branch with its sub-branches: 3,980 distinct among 34,911 kits. FTDNA gives surnames per branch only, with no country attached, so they cannot be split by country.

Smith 571
Campbell 334
Jones 318
Williams 297
Brown 287
Miller 264
Moore 259
Johnson 252
Stewart 239
Davis 224
Martin 214
Wilson 206
Taylor 171
Clark 170
Wright 169

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%.

R-L23: 10,860 samples. The common ancestor lived 6,100 years ago (5,500–6,800); the branch split off 6,400 years ago (5,700–7,100).