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Major update reorganizes entire haplogroup I2 tree

Friday, April 3, 2020

Major new branch in I-L233 "Western": 2020-04-02 draft tree

Click here to download our 2020-04-02 draft tree for I-L233 

For reasons of space we have created a new tree for the large I-Y4252 branch. We already have a tree for the smaller I-A8462 branch, and additional trees for subbranches of I-Y4252 and I-A8462.
Click here to find our new tree for I-Y4252

This update shows a major discovery in the I-L233 haplogroup. Until now, all known L233+ men have been either A8462+ or Y4252+. But a recent Big Y-700 result was L233+ and A8462- Y4252-. He was also Y4197- FGC56775- FGC80022- Y4258-, previously these SNPs had been considered equivalent to L233. He was derived (positive) for approximately 121 SNPs that are still considered equivalent to L233.

I-L233 now has two child branches: I-Y4197 with 148 Big Y samples and I-L233* with 1 Big Y sample. And I-Y4197 has two child branches: I-A8462 and I-Y4252. Previously I-L233 was the immediate parent of of  I-A8462 and I-Y4252.

The new I-L233* sample has Scottish ancestry and he shares a few distinctive marker values with some other I-L233. They all probably have paternal ancestry from Scotland or northern England

The characteristic marker values of the L233+ Y4197- group are:
Y-GATA-H4=9 (normal value for I-L233 is 10)
DYS464=11-14-15-15 (normal value for I-L233 is 11-14-14-15)
DYF395S1=16-16 (normal value for I-L233 is 16-17)
DYS617=13 (normal value for I-L233 is 14)
DYS434=9 (normal value for I-L233 is 10)

Of course it's possible that there are additional L233+ Y4197- men with different marker patterns. But based on many previous Big Ys, SNP packs, SNP panels, Genographic 2.0 tests, individual SNP tests, almost all L233+ men are Y4197+ and belong to either A8462+ or Y4252+ (most of them belong to Y4252+).

At FTDNA's I-P37 project, you will see some people with I-Y4197 results on our Y-DNA classic and colorized STR results pages, these people did a version of the Genographic 2.0 test that included Y4197.


Click here to find our previous tree for I-L233 which included information on I-Y4252

Click here to for a brief description of the I-L233 haplogroup

Thursday, April 2, 2020

First draft tree specific to I-Y4252 (2020-04-02)

Click here to download our first draft tree specific to I-Y4252

For reasons of space, we have created a new tree specific to I-Y4252.

I-Y4252 contains most of the I-L233 "Western" haplogroup. I-L233 had a MRCA who lived 2000 years ago according to YFull's latest calculation.

At this point, all known L233+ Y4252- men have British paternal origin, while the L233+ Y4252+ group contains men from Great Britain and Ireland, and from Continental Europe and Scandinavia. But maybe this simply reflects the much higher percentage of British origin men who have done Y-DNA tests (L233+ Y4252- is uncommon even in Britain).

This update shows a new branch called I-BY210124, it's found in SE Europe (Croatia and Albania). It's part of the larger I-A10033 branch which is maybe the most common branch of I-L233, and which is nearly always found in Continental Europe and Scandinavia (only 2 British families are known).

This update shows a new level called I-FT94277, it's the parent of the previously known I-A15050 branch.

This tree also shows a new sample in the I-BY160207 "Western-Isles" branch, this branch has exclusively British origin according to current knowledge.

Click here to find our previous tree for I-L233 which included I-Y4252
Click here for a brief description of the I-Y4252 haplogroup

Monday, March 23, 2020

New Hungarian branch: 2020-03-22 tree for I-S17250

Click here to download our 2020-03-22 draft tree for I-S17250

This update shows a new branch called I-BY206162, it's part of I-A2423. There are two samples and they both have Hungarian paternal ancestry, one is from southern Slovakia on the border with Hungary.

This update also shows a sample from southern Poland in I-FT42350 (also part of I-A2423), and a sample from Sweden in I-A815*.

Click here to find our previous tree for I-S17250
Click here for a brief description of the I-S17250 haplogroup

Sunday, March 22, 2020

2 new branches, one thanks to a Dante Labs sample: 2020-03-21 tree for I-Y4882

Click here to download our 2020-03-21 draft tree for I-Y4882

This update shows a new branch called I-FT109380, it's part of I-A1328. There are two known samples in I-FT109380, one did the Big Y-700 at FTDNA and the other did a test at Dante Labs.

This update also shows a new branch called I-FGC64964. There are two known samples, both have paternal ancestry from Slovakia.

This update also shows a new sample in the I-Y100616 branch.

Click here to find our previous tree for I-Y4882
Click here for a brief description of the I-Y882 haplogroup

Wednesday, March 18, 2020

several new branches: 2020-03-18 tree for I-PH908

Click here to download our 2020-03-18 draft tree for I-PH908

This update shows 5 new branches:


  • I-Y45843 Croatia and Bosnia and Herzegovina
  • I-BY153567 is now the parent of I-BY154460. There is one known I-BY154460* sample, he did individual SNP tests at YSeq and received BY153567+, BY152858-, BY154460- results
  • I-S10860 Bosnia and Herzegovina
  • I-FT36524 (Belarus and Russia ). This is a new haplogroup immediately below I-FT16449.
  • I-FT25907 (Serbia/Montenegro) based on a FTDNA sample and a Dante Lab sample (his origin is unknown to me)
This update also shows a new sample (Germany ancestry) in the I-MF2888 haplogroup, and two closely related samples (Bulgaria ancestry) in the I-FT16449* haplogroup.


Click here to find our previous tree for I-PH908
Click here for a brief description of the I-PH908 haplogroup

I-S20602 now has 5 named branches: 2020-03-18 tree for I-CTS10228

Click here to download our 2020-03-18 tree for I-CTS10228

I-S20602 now has 5 named branches:

  • I-FGC12098 is the newest branch, it is shown on this tree update. There are two known members, one has ancestry from southern Poland and one has paternal ancestry from northeastern Bosnia and Herzegovina. The two men share at least 6 SNPs below I-FGC12098, and maybe FTDNA and YFull will choose different SNPs to name this branch
  • I-S17250 is the most common branch. It prevails in Central Europe (Poland, Hungary, Germany, Slovakia, Czech Republic, part of Ukraine) and Southeastern Europe. This haplogroup encompasses a part of Dinaric North cluster and the whole Dinaric South cluster (which is I-PH908)
  • I-Y4460 prevails in eastern and northeastern Europe (Russia, Belarus, Ukraine, Baltic countries). All persons from this haplogroup are in the Dinaric North cluster.
  • I-Z17855 can be found in mostly in Bulgaria, also in Serbia, Greece, Hungary and Ukraine. This haplogroup is also in the Dinaric North cluster.
  • I-Y18331 is mainly found in Greece, it also contains the Jewish diaspora cluster and a small number of additional samples from Chuvashia, Ukraine and elsewhere.
I-S20602 has a sixth branch, but this branch is unnamed because it contains only a single known family with ancestry from Germany.

This update also shows two new samples in the I-Y18331 branch. One is a member of the Jewish Diaspora cluster, and the other belongs to I-Y66192*, he has ancestry from western Macedonia
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As a reminder, the Dinaric cluster was initially identified as a pattern of Y-DNA STR markers. If we define this cluster as the group with DYS565=9, then Dinaric is equivalent to I-CTS10228 which has a TMRCA of 3800 years ago according to YFull's estimate. (TMRCA is "time to most recent common ancestor").

But in fact almost all I-CTS10228 men belong to the more specific I-S20602 haplogroup which has a TMRCA of 2100 years ago according to YFull's calculation. So when we are talking about the rapid expansion of the Dinaric group across Eastern and Central Europe, we are talking about I-S20602.

The I-S20602 SNP has another name: YP196, the SNP was given different names by two different labs. S20602 and YP196 both refer to the same mutation at the same Y chromosome position: hg38 Chr Y: 15971418 A to C. We can refer to this SNP as YP196/S20602 and we can refer to this haplogroup as I-YP196/S20602.

There are 5 SNPs that are known to be equivalent to YP196/S20602. These are different mutations that occur at different positions on the Y chromosome. One of these SNPs is Y3120/FGC12085: Chr Y: 21671886 G to A. We call YP196/S20602 equivalent to Y3120/FGC12085 because everyone who has tested both SNPs has exactly the same result for both SNPs: everyone is either positive for both SNPs or negative for both SNPs, no one is positive for one SNP and negative for the other SNP.

YFull refers to the I-S20602 haplogroup by a different name: I-Y3120. As mentioned, S20602 and Y3120 are different SNPs but they are equivalent SNPs.


Click here to find our previous tree for I-CTS10228
Click here for a brief description of the I-CTS10228 haplogroup