HARRINGTON Y-Chromosome DNA Surname Project
The goal of the HARRINGTON Surname Project is to distinguish between HARRINGTON ancestral lines, worldwide. Any reasonable spelling variant is included (please feel free to suggest a variant you feel I have missed).
Please note that, to participate meaningfully, you will need to share your male direct-line ancestry either in the form of a pedigree or, preferably, as family group sheets. DNA is best understood when used as a compliment to traditional genealogical research.