Haplogroup H is the most common mtDNA haplogroup in Europe - 40% - 50% of Europeans
Haplogroup H (mtDNA) - From Wikipedia :
Haplogroup H (mtDNA)
In human mitochondrial genetics, Haplogroup H is a human mitochondrial DNA (mtDNA) haplogroup. Haplogroup H is a descendant of haplogroup HV. The Cambridge Reference Sequence (CRS), the human mitochondrial sequence to which all other sequences are compared, belongs to haplogroup H.
Haplogroup H is the most common mtDNA haplogroup in Europe. About one half of Europeans are of mtDNA haplogroup H. The haplogroup is also common in North Africa and the Middle East. The majority of the European populations have an overall haplogroup H frequency of 40%–50%.
Frequencies decrease in the southeast of the continent, reaching 20% in the Near East and Caucasus, and <10% in the Persian Gulf, Northern India and Central Asia.
Several independent studies conclude that haplogroup H probably evolved in West Asia c. 30,000 years ago having arrived to Europe c. 20-25,000 years ago, spreading rapidly to the southwest of the continent. This would make its arrival roughly contemporary with Gravettian culture.
They are also coincident in that the spread of subclades H1, H3 and the sister haplogroup V reflect a second intra-European expansion from the Franco-Cantabrian region after the last glacial maximum, c. 13,000 years ago.
In July 2008, it was published that the ancient mtDNA from an individual called Paglicci 23 whose remains were dated to 28,000 years ago and excavated from Paglicci Cave (Apulia, Italy) had been found to be identical to the Cambridge Reference Sequence in HVR1. The haplotype was different from all persons that had handled the Paglicci 23 remains since their discovery.