Ireland Y-DNA

FamilyTreeDNA holds for Ireland: 22,246 kits with a Y-DNA result. On the paternal line the most common are R1b-L151 — 6%, R-DF21* — 5% and R-DF105* — 5%. YFull has 984 samples for Y from the same area, and its mix of major branches is broadly the same. The largest gap is I-L137: 2% on FTDNA against 5% on YFull.

22,246

kits

8,206 distinct finest branches

27%

on leaves

share of kits that reached the finest branch of the tree. The rest stopped at a broad branch: their test was not detailed enough.

44%

Big Y

rough share of kits with a Big Y test, a full read of the Y chromosome. It is estimated from the branches where the region's kits sit, so it is an estimate, not a count.

Each colour is one of the eight most common macro-haplogroups worldwide (the first letter of the haplogroup, such as R or J). Everything else is grey.RIJENGQTother

Level 1

Macro-haplogroups #

The first letter of the haplogroup, the broadest division of the Y tree. Percentages of all the region's kits.

18,345 · 82.5%

2,889 · 13.0%

352 · 1.6%

338 · 1.5%

214 · 1.0%

39 · 0.2%

25 · 0.1%

14 · 0.1%

8 · 0.0%

5 · 0.0%

1 · 0.0%

Level 2

Major branches (clades) #

The major branches the region's kits belong to. Each kit is counted once, in the finest major branch its test reached. Asterisk: kits left on the branch itself because they fall into none of its major sub-branches. A branch counts as major when it holds at least 0.4% of all kits worldwide.

R-L151* R1b-L151

1,424 · 6.4% 5,100 years

R-DF21*

1,144 · 5.1% 4,400 years

R-DF105*

1,079 · 4.9% 1,800 years

R-M222* R1b-M222

995 · 4.5% 2,100 years

R-A541

984 · 4.4% 2,000 years

R-Z255

820 · 3.7% 2,100 years

R-Z2534*

779 · 3.5% 4,400 years

R-L21* R1b-L21

728 · 3.3% 4,700 years

R-Z253*

639 · 2.9% 4,500 years

R-L513*

534 · 2.4% 4,000 years

R-S588

532 · 2.4% 1,700 years

R-S673

522 · 2.3% 1,700 years

R-Z39589*

468 · 2.1% 4,500 years

R-M269* R1b-M269

441 · 2.0% 6,500 years

R-S5668

382 · 1.7% 3,800 years

R-Z31644

363 · 1.6% 4,400 years

I-L137

354 · 1.6% 5,800 years

R-DF25

353 · 1.6% 4,100 years

R-Z2959*

330 · 1.5% 2,100 years

I-CTS5375*

311 · 1.4% 13k years

Level 3

Key branches tree #

Tree of the main branches. Each branch counts every kit in it and in its sub-branches; sub-branches are indented. Branches of at least 1% of the sample are shown; pass-through branches with no side branches are skipped. Age is how many years ago the branch's common ancestor lived (TMRCA), from FTDNA Discover.

R R-M207

18,345 · 82.5% 28k years

└ R1b-L51 R-L51

17,288 · 77.7% 6,100 years

└ P312 R-P312

14,381 · 64.6% 4,900 years

└ L21 R-L21

12,642 · 56.8% 4,700 years

└ DF13 R-DF13

11,914 · 53.6% 4,600 years

└ M222 R-M222

3,777 · 17.0% 2,100 years

└ DF27 R-DF27

968 · 4.4% 4,700 years

└ U152 R-U152

530 · 2.4% 4,700 years

└ U106 R-U106

1,435 · 6.5% 5,000 years

└ L48 R-L48

648 · 2.9% 4,500 years

└ R1a-M198 R-M198

426 · 1.9% 8,500 years

└ Z282 R-Z282

234 · 1.1% 4,800 years

I I-L758

2,889 · 13.0% 35k years

└ I1 I-M253

1,259 · 5.7% 20k years

└ DF29 I-DF29

835 · 3.8% 4,500 years

└ Z58 I-Z58

402 · 1.8% 4,500 years

└ L22 I-L22

256 · 1.2% 3,900 years

└ I2b I-M223

896 · 4.0% 17k years

└ M284 I-M284

453 · 2.0% 9,800 years

└ I2a I-P37

518 · 2.3% 20k years

J J-M304

352 · 1.6% 30k years

└ J2 J-M172

272 · 1.2% 28k years branch tree ↗

E E-M96

338 · 1.5% 52k years

└ E1b1b-M35 E-M35

292 · 1.3% 25k years

YFull

The same country on YFull #

The same country at the second company, YFull. Its samples are placed on the FTDNA tree by shared mutations, so the branches are comparable. FTDNA share on the left, YFull on the right, then the difference in percentage points. Republics and other sub-regions are taken out of the country, as at FTDNA. Starred branches are nearly empty at YFull: every test there is whole-genome and reaches the fine branches. Only YFull customers (YF number) are counted, no ancient DNA. YFull data of 2026-09-29.

22,246

FTDNA

kits

984

YFull

samples

Macro-haplogroups

FTDNAYFull

FTDNA · YFull · Δ

82.5% · 71.0%−11.4

13.0% · 24.6%+11.6

1.6% · 0.8%−0.8

1.5% · 1.5%0

1.0% · 1.4%+0.5

0.2% · 0.2%0

0.1% · 0.2%+0.1

0.1% · 0.1%0

0.0% · 0.1%+0.1

0.0% · 0.0%0

Major branches (clades)

FTDNAYFull

FTDNA · YFull · Δ

R-L151* R1b-L151

6.4% · 0.2%−6.2

R-DF105*

4.9% · 6.1%+1.2

I-CTS5375*

1.4% · 5.5%+4.1

R-DF21*

5.1% · 4.4%−0.8

I-L137

1.6% · 5.1%+3.5

R-Z255

3.7% · 4.8%+1.1

R-M222* R1b-M222

4.5% · 0.0%−4.5

R-A541

4.4% · 2.5%−1.9

R-Z2959*

1.5% · 4.0%+2.5

R-Z2534*

3.5% · 3.3%−0.2

R-S673

2.3% · 3.5%+1.1

R-L21* R1b-L21

3.3% · 0.1%−3.2

Distinctive branches #

Branches found here far more often than worldwide: their share is more than 3× the world share. The multiplier is in brackets. Branches of at least 10 kits are included.

R-A541: 984 kits · 4.4% (×8.2) 2,000 years
R-CTS4466: 1,229 kits · 5.5% (×7.7) 2,300 years
R-M222 R1b-M222: 3,777 kits · 17.0% (×6.6) 2,100 years
R-Z2959: 2,782 kits · 12.5% (×6.4) 2,100 years
R-DF105: 2,452 kits · 11.0% (×6.3) 1,800 years
R-Z255: 820 kits · 3.7% (×6.3) 2,100 years
R-DF13 R1b-DF13: 11,914 kits · 53.6% (×4.4) 4,600 years
R-ZZ87: 1,373 kits · 6.2% (×5.4) 1,800 years

Most similar countries #

Countries whose mix of major branches looks most like this one. The number is similarity: 100% is the same mix, lower means less in common. Computed only for countries with 100+ kits.