Ireland mtDNA

FamilyTreeDNA holds for Ireland: 10,138 kits with mtDNA. On the maternal line the most common are J1c — 7%, U5a — 5% and K1a — 5%. YFull has 157 samples for mt from the same area, and its mix of major branches is broadly the same. The largest gap is X2b: 1% on FTDNA against 5% on YFull.

10,138

kits

1,247 distinct finest branches

43%

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.

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.HUTJKVLIother

Level 1

Macro-haplogroups #

The opening letters of the mtDNA haplogroup (H, U, HV), the broadest division of the mt tree. Percentages of all the region's kits.

4,368 · 43.1%

1,423 · 14.0%

1,010 · 10.0%

952 · 9.4%

944 · 9.3%

429 · 4.2%

189 · 1.9%

165 · 1.6%

134 · 1.3%

27 · 0.3%

22 · 0.2%

14 · 0.1%

10 · 0.1%

8 · 0.1%

Level 2

Branches #

mt-tree branches shortened to three parts: letters, a number and one letter, such as U5a, H13a, J2b.

J1c

719 · 7.1% 13k years

U5a

557 · 5.5% 21k years

K1a

538 · 5.3% 11k years

T2b

483 · 4.8% 8,500 years

U5b

436 · 4.3% 22k years

H1a

351 · 3.5% 5,800 years

H2a

319 · 3.1% 8,200 years

H1b

286 · 2.8% 5,100 years

H6a

237 · 2.3% 7,900 years

H1c

214 · 2.1% 5,300 years

H4a

212 · 2.1% 9,500 years

H5a

198 · 2.0% 7,800 years

K1c

198 · 2.0% 16k years

T1a

195 · 1.9% 13k years

193 · 1.9% 7,200 years

U2e

158 · 1.6% 23k years

H3a

154 · 1.5%

J1b

152 · 1.5% 19k years

146 · 1.4% 5,100 years

133 · 1.3% 6,700 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.

10,138

FTDNA

kits

157

YFull

samples

Macro-haplogroups

FTDNAYFull

FTDNA · YFull · Δ

43.1% · 38.2%−4.9

14.0% · 17.2%+3.2

10.0% · 12.1%+2.1

9.4% · 8.9%−0.5

9.3% · 5.7%−3.6

1.3% · 6.4%+5

4.2% · 5.1%+0.9

4.2% · 1.3%−3

1.9% · 1.9%0

1.6% · 1.9%+0.3

0.3% · 0.6%+0.4

0.0% · 0.6%+0.6

Branches

FTDNAYFull

FTDNA · YFull · Δ

U5b

4.3% · 7.6%+3.3

J1c

7.1% · 7.0%−0.1

K1a

5.3% · 5.7%+0.4

U5a

5.5% · 4.5%−1

X2b

0.9% · 5.1%+4.2

T2b

4.8% · 2.5%−2.2

H1b

2.8% · 4.5%+1.6

H4a

2.1% · 3.8%+1.7

H1a

3.5% · 2.5%−0.9

H3b

1.2% · 3.2%+2

U4b

0.7% · 3.2%+2.5

H2a

3.1% · 2.5%−0.6

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.

V15a: 60 kits · 0.6% (×5.7)
V10a: 70 kits · 0.7% (×5.3)
H7f: 21 kits · 0.2% (×7.3)
H56a: 31 kits · 0.3% (×6.2)
H3i: 23 kits · 0.2% (×6.5)
H64: 30 kits · 0.3% (×5.9)
V24: 21 kits · 0.2% (×6.2)
H51: 24 kits · 0.2% (×5.1)

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.