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"Danish Demes"
Lineages and Results of mtDNA Testing for a Regional Danish DNA Project
Haplogroup H — "Clan Helena"
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H (11) J (1) K (2) T (3) U (2) V (2)
Mitochondrial DNA Haplogroup H, popularly known as, "Clan Helena," is the most common mtDNA haplogroup in Europe.  Overall, it's frequency ranges about 30-40%, but the frequency ranges from about 20% in eastern Europe to about 45% in northwestern Europe to as high as 65% in Iberia.

In the trivia department, Marie Antoinette and Queen Victoria, among many other European nobility, were Haplogroup H.
Members who are Haplogroup H will want to consider having the mtDNA-H-refine subclade test to place themselves in one of the currently known subclades of H.  Several of these subclades are very specific geographically, so I strongly recommend all Haplogroup H members take the H-refine test.  The mtDNA-H-refine test analyzes a different suite of markers than either the HVR1 or HVR2 tests (i.e., markers outside the hypervariable regions), so the tests are not redundant, but independent.

So far, we have eleven Danish Demes project members who are Haplogroup H.
Eight of the eleven have completed the mtDNA-H-refine test, so their subclades are known.

Haplogroup Haplogroup H Subclade
 H 
(n = 3)		 H*
(n = 1)		 H1a
(n = 1)		 H2a
(n = 1)		 H2b
(n = 2)		 H4a
(n = 1)		 H5a1
(n = 1)		 H10
(n = 1)
The Cambridge Reference Sequence (CRS) is arbitrarily designated as the standard against which all mtDNA sequences are compared, and subject test results are expressed as differences from the CRS.  In the hierarchical (evolutionary) tree of mtDNA haplogroups, the CRS turns out to be Haplogroup H2b.  The CRS also happens to be negative for the 519C mutation, which is otherwise very common, so the majority of tested individuals will have this mutation listed in the HVR1 region.
In the table below, a darkened empty cell means the test was not ordered.  All HVR1 marker designations begin with "16___"; so, to save space and improve readability, I've dropped the 16 in the tables.  With regard to results, a letter in red indicates a mutation (a base has changed); a letter in green indicates a new base has been inserted; a minus sign (-) indicates a base has been lost.
With regard to lineages, given names and patronymics are shown as Initial Caps, while surnames are shown in ALL-CAPS (these are the womens' maiden names, not their married names).
Your project admin recommends uploading your mtDNA results to MitoSearch.org, which can be done at your FTDNA member page (on the "mtDNA Matches" tab).
Haplogroup H
H - Deme 1
Kit # MitoSearch
User ID		 Differences from CRS Known Lineage
HVR1 HVR2
79032 - 519C 263G, 315.1C, 477C Dau3, Dau2, [awaiting more details] CHRISTENSEN1 — subject, mother, and maternal grandmother all born in DK
This individual has one of the most common HVR1 mutations (viz., 519C), so it is no surprise that her HVR1 region has thousands of matches in the FTDNA database.  When combining her HVR1+HVR2 results, she has several dozen matches in the FTDNA database.  Your admin recommends uploading results to MitoSearch.org, where the origin of "matchees" can be assertained without having to individually email each matching test subject to find out what it is.  And as with all Haplogroup H individuals, an H-refine test is recommended to determine the haplogroup subclade.
H - Deme 2
Case # MitoSearch
User ID		 Differences from CRS Known Lineage
HVR1 HVR2
T0662100 5JSDK 189C, 193.1C, 193.2C, 519C   Son6, Dagmar Marie SØRENSEN5, Jensine JENSEN4, Kirsten Marie Jensen3, Maren Jørgensen2, Kirsten Povelsen1 — of Tiset, Tiset Sogn, Ning Herred, Århus Amt, DK
This individual's mtDNA was tested at DNA Consulting (Santa Fe, NM) so we cannot directly compare him against the FTDNA database.  Your project admin recommends entering these results at MitoSearch.org,  testing the HVR2 region, and taking an H-refine test to determine his subclade.
H - Deme 3
Kit # MitoSearch
User ID		 Differences from Cambridge Reference Sequence Known Lineage
HVR1 HVR2
87239 RCHNB 162G, 209C, 234T, 519C 73G, 263G, 315.1C Son [awaiting lineage] Inge Laursdatter1 — of Tyrstrup, Tyrstrup Sogn, Sønder Tyrstrup Herred, Haderslev Amt, DK
#87239 has no full matches in either the FTDNA or mitoSearch databases.  He has just one difference (234T) from Member #N10950, who is subclade H1a.  Without that mutation, this individual would have dozens of matches in both databases.  Your project admin recommends an H-refine test to determine his subclade. 
Subclade H*
The asterisk after the H indicates a person is "root" or "ancestral" Haplogroup H; that is, the individual has not accumulated any of the mutations that would place them in a more "downstream" subclade.  This subclade is seen throughout Europe, thouh it is most frequent in the Middle East, it's presumed origin.
H* - Deme 1
Kit # MitoSearch
User ID		 Differences from CRS Known Lineage
HVR1 HVR2
27378 YPHPA 519C 263G, 309.1C, 315.1C Dau7, Dau6, Karla E. RASMUSSEN5, Oline Johanne PEDERSEN4, Mette Kjerstine Olejohansdatter3, Mariane Hansdatter2, Kirsten Eriksdatter1 — of Skanderborg Amt, DK
#27378 has only one difference from the CRS in HVR1.  This is an extremely common haplotype with thousands of matches in the FTDNA database alone. The upgrade to include HVR2 has lowered the number of matches, but her HVR1+HVR2 haplotype is still common, with over 140 matches in the FTDNA database alone.  Her mtDNA-H-refine test shows her to be "root" H.
Subclade H1a
H1a and H1b are branches of H1, the most common subclade of H (and, thus, the most common subclade in western Europe).  Subclade H1a is too large and too diverse to characterize at this time.
H1a - Deme 1
Kit # MitoSearch
User ID		 Differences from CRS Known Lineage
HVR1 HVR2
N10950 YUH73 162G, 209C, 519C 73G, 263G, 315.1C Dau4, Dau3, Elvene Lucretia RASMUSSEN2, Wilhelmina Serafina HANSEN1 — of København, Sokkelund Herred, København Amt, DK
This individual has transferred in from the National Geographic Society's "Genographic Project."  With her combined HVR1+HVR2 values, she has over 50 matches in the FTDNA database and over 60 in the Ysearch database.  Her H-refine test showed she is subclade H1a.
Subclade H2a
H2a is most common in eastern Europe among slavic and Finnish populations, but also occurs in western Europe.
H2a - Deme 1
Kit # MitoSearch
User ID		 Differences from CRS Known Lineage
HVR1 HVR2
65795 V6R3Q 354T 152C, 263G, 309.1C, 315.1C Joanné Dee JAMES5, Evelyn Gladys FALKENSTROM4, Johanne Petrea Elisabeth KRAGH3, Anna Laurine HOLM2, Charlotte BRUHN1 — of Jels, Jels Sogn, Gram Herred, Haderslev Amt, DK
#65805 has a unique haplotype.  In the FTDNA database, she has over 100 HVR1 matches, but no HVR1+HVR2 matches.  In the MitoSearch database, she has some near and full HVR1 matches and a few near HVR2 matches, but no full matches in the HVR2 region.  Her mtDNA-H-refine test shows her to be subclade H2a.
Subclade H2b
This subclade is the one to which the Cambridge Reference Sequence belongs.
H2b - Deme 1
Kit # MitoSearch
User ID		 Differences from CRS Known Lineage
HVR1 HVR2
50884 NEBCN none   Son9, Elise Caroline BRAREN8, Margaretha Fredricke BOHN7, Elise Caroline NAHMENS6, Inge BEHRENS5, Jung Krassen Hankens4, Inge Nahmens3, Thur Conrads2, Ing Jung Jensen1 of Föhr, Nordfriesland, Schleswig-Holstein, DEU
#50884 has no differences from the Cambridge Reference Sequence, at least not in HVR1, and he has hundreds of matches in both the FTDNA and MitoSearch databases.  His mtDNA-H-refine test shows him to be in subclade H2b.  Your project admin recommends testing the HVR2 region to reduce matches to more closely related kin. 
H2b - Deme 2
Kit # MitoSearch
UserID		 Differences from CRS Known Lineage
HVR1 HVR2
N21963 UWE6S 320T 309.1C, 309.2C, 315.1C Son3, Pvt2, Olga Marie NIELSEN1 — of Roskilde, Roskilde Sogn, Sømme Herred, Roskilde Amt, DK
This individual has an uncommon haplotype, with only three matches with his HVR1 region, alone, and only one match with his combined HVR1+HVR2 regions.
Subclade H4a
Kit # MitoSearch
UserID		 Differences from CRS Known Lineage
HVR1 HVR2
N22636 383M2 none 263G, 315.1C, 522, 523 Son [awaiting lineage] Ruth PETERSEN of København, DK
This individual has a common haplotype, with over 1300 HVR1 matches and ten HVR1+HVR2 match.  Checking his Ancestral Origins tab, his high level H4 matches are entirely Danish.
Subclade H5a1
Haplogroup H5a is found at low levels throughout Europe, but is most frequent in populations inhabiting the plains of central Europe.  It is absent from the Caucasus and the Near East, so apparently evolved from H5 after the initial re-settlement of Europe following the last Ice Age.  H5a appears to have originated about 7000-8000 years ago.
H5a1 - Deme 1
Kit # MitoSearch
User ID		 Differences from Cambridge Reference Sequence Known Lineage
HVR1 HVR2
33061 4QD2U 304C, 519C 263G, 309.1C, 315.1C, 456T, 522-, 523- Son7, Dau6, Ella Earnestine JACOBSEN5, Emma Margaretha UNTIEDT4, Ernestine Johanna MEIER3, Anne Helene ALFATTER2, Anne Elisabeth Kirstine Madsdatter1 — of København, DK
#33061 has an uncommon haplotype.  While his HVR1 values, alone, are not rare (having dozens of matches), his HVR2 values have only a handful of matches, and his combined HVR1+HVR2 values have only a single full match in the FTDNA database and no full matches at MitoSearch.
Subclade H10
Kit # MitoSearch
UserID		 Differences from Cambridge Reference Sequence Known Lineage
HVR1 HVR2
N19607 N7GAE 42A, 243C, 519C 73G, 263G, 309.1C, 315.1C Dau [awaiting lineage] Johanne __?__1 — of Velling, Velling Sogn, Hind Herred, Ringkøbing Amt, DK
This individual has a rare haplotype with no matches, even in just HVR1.  Her closest match is an individual at mitoSearch, who has tested only HVR1 and has one difference (this individual lacks the 243C mutation and has an origin in Germany).

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