Updated 14 September 2024 The Big Y 700 is our test of choice for males. To help find family connections for the McWILLIAMS of all spelling and variations. By joining the group you agree to provide the project with 3 things. 1) The surname of the person being tested. 2) The name, date and place of birth of the oldest researched male ancestor of your male patrilineal line and the oldest researched female ancestor of your matrilineal line. 3) Permission to publish the DNA results and the names, dates and places of birth of the oldest known patrilineal or matrilineal ancestor. The McWilliams Family DNA Project is open to all who are interested in working together to find their common heritage through sharing of information and DNA testing. All variant spellings are welcome. If your Surname is missing and should be included, we'll be glad to add it.