Mictochondrial haplogroup HV is believed to have expanded throughout Europe 20,000 years before present, before the advent of farming in Europe. Today, it is most common in Western Europe (and descendant populations).
Haplogroup HV derives from the Haplogroup R0 (which in turn derives from haplogroup R). HV is also the ancestral haplogroup to Haplogroup H and Haplogroup V.
A 2003 study was published reporting on the mtDNA sequencing of the bones of two 24,000-year-old anatomically modern humans of the Cro-Magnon type from Southern Italy. The study showed one was of either haplogroup HV or R0 (Caramelli et al., 2003).
Caramelli, D., Lalueza-Fox, C., Vernesi, C., Lari, C, Casoli, A, Mallegni, F., Chiarelli, B., Dupanloup, I., Bertranpetit, J., Barbujani, G., Bertorelle, G. 2003. Evidence for a genetic discontinuity between Neandertals and 24,000-year-old anatomically modern Europeans. Proceedings of the National Academy of Sciences, v. 100, p. 6593-6597.