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About us

Welcome to the COSSAR and CROSSER worldwide DNA project. Surnames in this project: Cossar, Cosser, Cossor, Crossar, Crosser. We encourage you to join today!

This project is running in parallel with the established COSSAR and CROSSER surname research study. DNA is a new part of the study and we hope that each will throw light on the other. Information about the family research can be found at:

If you have a different surname but believe there is a Cossar/Crosser or variant in your direct male line, you are also welcome to take part.

We encourage men who order a Y DNA test to order 37 markers, if possible. If you order fewer markers, you can upgrade later, though this costs a little more.