A · BT · CT · F · K · K2 · K2b · NO · N · N1 · N1a · N1a1 · N1a1a · N-Z1936 · N-Z1927 · N-Z1933 · N-VL62 · N-Z1939 · N-Y7308 · N-Y7310 · N-BY18484

Haplogroup N-BY18484

N-BY18484 (Y7310 downstream Finnish medieval branch)

Macro-haplogroup

Parent clade

N-Y7310

Formed (estimate)

c. 1,100–1,300 years before present

TMRCA (estimate)

c. 900–1,050 years ago

BY18484

Overview

N-BY18484 is a downstream branch in the Y7310 cluster of N-Z1939, representing one of the later-forming but genealogically important Finnish microclades. Its timing suggests that BY18484 emerged during the medieval internal colonization of inland Finland, when population growth, settlement nucleation and family-level expansion produced distinct paternal signatures. BY18484 appears as one of the identifiable clades used in Finnish surname and parish-level genetic studies.

Geographic distribution

Modern BY18484 carriers are concentrated in eastern and central Finland (Savo, North Karelia, Kainuu) with extensions into southern Finland. Occasional cases in Sweden derive from historical Finnish migrants. Low-frequency presence in Karelia indicates a shared ancestry prior to political separation between Finnish and Karelian groups.

Ancient DNA

Z1939 predecessors of BY18484 appear in archaeological remains from Iron Age Finland.
Formation dates correspond to the internal settlement expansion period (~900–1100 CE).
Microbranch structure reflects medieval demographic stabilization.

Phylogeny & subclades

Placed under Y7310, BY18484 represents one of its terminal yet well-supported downstream clades. Its structure includes several parallel and private lines defined through BigY tests. Genealogical projects consistently treat BY18484 as a distinct medieval Finnish lineage.

N-BY18484*
Private downstream BigY-identified clades

Notes & context