Teer, Tier and Tear are variations of the same surname, but different family lines can be identified by Y-DNA testing. The Teer project is open to all who are interested in establishing contact with other Teer lines, would like to validate their genealogical research by identifying those related, and are willing to provide mutual assistance to those participating in the project. Please consider becoming a member of the surname project and ask others to join. You must be male to be tested, but females can check their paternal line by having a male relative do the Y-DNA test. The 37 marker test is a good place to start, but the 67and the 111 marker test are even better. For the paper trail, start with yourself, your father, grandfather and so on as far as you can go.