Y-haplogroup R1a has several defined subclades. "Young Scandinavian" L448 is downstream of Z284 which covers the Scandinavian R1a clades.
R1a-L176 Scottish subcluster is a subgroup of L448.
R1a-L448 is found among many Scandinavian R1a and is typically Norse.
If you have tested with Genographic, FTDNA, DNA Heritage - please join the R1a1a and Subclades Project at Family Tree DNA.
See SNP tree from the R1a1a and Subclades Project.
New SNPs are discovered continuously and the tree will be in constant progress. Thus the hierarchical names will change regularly, see the ISOGG tree.
Subclades with project pages on Geni:
- More about Y-haplogroup R1a on Wikipedia