https://www.eupedia.com/europe/Haplogroup_H_mtDNA.shtml
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Geographic distribution
Haplogroup H is the most common and most diverse maternal lineage in Europe, in most of the Near East and in the Caucasus region. The Saami of Lapland are the only ethnic group in Europe who have low percentages of haplogroup H, varying from 0% to 7%. The frequency of haplogroup H in Europe usually ranges between 40% and 50%. The lowest frequencies are observed in Cyprus (31%), Finland (36%), Iceland (38%) as well as Belarus, Ukraine, Romania and Hungary (all 39%). The only region where H exceeds 50% of the population are Asturias (54%) and Galicia (58%) in northern Spain, and Wales (60%).
Haplogroup H possesses approximately 90 basal subclades identified to date, most of which further subdivided in other subclades. The most common subclades are H1, H2, H3, H4, H5, H6, H7, H10, H11, H13, H14 and H20. The Cambridge Reference Sequence (CRS), the human mitochondrial sequence to which all other sequences are compared, belongs to haplogroup H2a2a.
H1 & H3
Haplogroup H1 is by far the most common subclade in Europe, representing approximately than half of the H lineages in Western Europe. Roostalu et al. (2006) estimate that H1 arose around 22,500 years ago. H1 is divided in 65 basal subclades. The largest, H1c, has over 20 more basal subclades of its own, most with deeper ramifications. H1 is found throughout Europe, North Africa, the Levant, Anatolia, the Caucasus, and as far as Central Asia and Siberia. The highest frequencies of H1 are observed in the Iberian peninsula, south-west France and Sardinia. H3 has a very similar distribution to H1, but more confined to Europe and the Maghreb, and is generally two to three times less common than H1.