Updated 14 September 2024 To help find family connections for the CALDERs 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 Calder Family Project is open to all who are interested in working together to find their common heritage through sharing of information and DNA testing. All spelling variations are welcome. If your Surname is missing and should be included, we'll be glad to add it. According to one source, this surname may be of either early medieval English or Scottish origin, and is a locational name from Calder in Cumberland, or from any of the various places in Scotland called Calder or Cawdor. For more, see http://www.surnamedb.com/Surname/Calder