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Europedia ~ "The Visigothic Kingdom was the larger and longer lived than the Suebi Kingdom, and yet the Goths do not seem to have had any significant genetic impact on the Iberian population - at least not in terms of Germanic Y-DNA. The reason might simply be that they were no longer a predominantly Germanic tribe. After all, the Goths had lived for many centuries in Eastern Europe and nearly two more centuries in the Balkans before invading Italy, Gaul and Iberia. They could have assimilated a lot of non-Germanic people on the way, notably R1a and I2a1b Slavs and predominantly E1b1b, I2a1b and J2 Balkanic people. It would be pretty complicated at the moment to untangle the Balkanic E1b1b and J2 from all the others (Neolithic, Phoenician, Greek, Roman, Jewish, Arabic) found in Iberia. But it is remarkably easy to check the Eastern European I2a1b (M423) and R1a (M458 and Z280). No historical migration could account for Slavic haplogroups in Iberia apart from the East European populations assimilated by the Goths before the 4th century. The I2a Project at FTDNA has three M423-Dinaric-N and one M423-Isles-B2 from Spain, while the R1a1a and Subclades Y-DNA Project has four Spanish Z280 (CTS1211+) members."
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