Hello...I also am L-664, with paternal ancestry going back to 17th Century England. I have been researching the origin and distribution of our subclade. They call it the Northwestern Europe group. I believe it was part of the Corded Ware Culture, and Michal Milewski, the R1a Project Coordinator at Family Tree DNA, told me that it may have Frisia, among other regions, as a distribution point. I have sent my raw data to YFull for analysis, and note several Scandinavian connections.