Latvians (latvieši) are a Baltic ethnic group and nation native to Latvia and the immediate geographical region, the Baltics. They are occasionally also referred to as Letts, especially in older bibliography. Latvians share a common Latvian language, culture, history and ancestry.
A Balto-Finnic-speaking tribe known as the Livs settled among the Latvians and modulated the name to "Latvis", meaning "forest-clearers", which is how medieval German, Teutonic settlers also referred to these peoples. The Germanic settlers referred to the natives as "Letts" and the nation to "Lettland", naming their colony Livonia or Livland.
The Latin form, Livonia, gradually referred to the whole territory of modern-day Latvia as well as southern Estonia, which had fallen under a minimal Germanic influence. Latvians and Lithuanians are the only surviving members of the Baltic branch of the Indo-European family.
Paternal haplogroups R1a and N1a1-Tat are the two most frequent, reaching 39.9% each among ethnic Latvians. R1a has originated in Eastern Europe and is associated with spread of Indo-European languages. R1a of Latvians is predominantly M558 and compared to other populations also has the highest concentration of M558 among R1a. N1a1-Tat mutation originated in East Asia and had spread through the Urals into Europe where it is currently most common among Finnic, Baltic and Eastern-Slavic peoples. Latvians and Lithuanians have a predominance of the L550 branch of N1a1-Tat.
N1c1a was present in 41.5%, R1a1a-M558 in 35.2% and I1 (M253) in 6.3% of the samples analyzed. In lower levels 2.5% of I2b (M223) and 0.6% I2a (P37.2) was found as well.
Latvians share a common language and have a unique culture with traditions, holidays, customs and arts. The culture and religious traditions have been somewhat influenced by Germanic, Scandinavian, and Russian traditions. Latvians have an ancient culture that has been archaeologically dated back to 3000 BC. Latvians maintained a considerable connection and trade with their neighbors.