Welcome to the web-site of the Clan Irwin Surname DNA Study. This Study was launched in 2005, with the assistance of Kent Irvin, and its website was re-vamped in 2011 and again in 2021, with the assistance of Rick Byers.

This Study, its website and its administrators are fully independent from both FamilyTreeDNA and the Clan Irwin Association, although the Study continues to support the Association and to recognize that the interests and memberships of the two entities have considerable overlap.

This November 2021 Update is the 31st update of our Study. Highlights include:

  • New website format, accessible by mobile phone.

  • Website content revised and updated, and the History of the Study (Supplementary Paper 7) completed.

  • Our Study now has 581 yDNA testers; 97 (17%) have BigY tests completed, and a further 73 have Pack Test results,

  • The Study has identified 46 branches, the largest of which, the Border Irwins, now has 379 testers, of whom 67 have taken BigY700 tests.

  • Our L555 Border Irwin haplotree has been extended to become the L555 genetic family tree, dates have been added, and further refinements continue. This tree now includes 220 testers, who represent 58% of all L555 testers. Each L555 BigY test has thus enabled a further two L555 non-BigY testers to be included in this tree.

  • This tree now includes a "node-by-node" TMRCA calculation which dates the first Border Irwin as late-14th century, a little more recent than hitherto assumed.

  • The remainder of our Border Irwins who are not yet on this genetic tree are recommended to consider taking BigY700 test, now at reduced prices.

  • Our Study remains amongst the leaders in the evolving issues addressed by Surname DNA projects, particularly in our ability to connect conventional pedigrees to the haplotree of mankind.

As Administrator I am happy at any time to answer e-mail queries members and prospective members, and to forward our Main Results table and/or L555 genetic family tree as e-mail attachments.

I have recently published three books on Irwin genealogy. These incorporate several decades of diligent research in many libraries and archives around the world, public and private. They update previous books about the Irvings of Bonshaw and the Irvines of Drum and introduce new findings hitherto unpublished.

All three books can be ordered on-line from Amazon or www.waterstones.com, each for less than US$20. Proceeds go to the Bonshaw Preservation Trust.

In particular The Irwin Surname: its Origins, Diaspora and Early Branches provides a comprehensive background and context to our DNA Study. The Lairds of Bonshaw and Drum and the Chairman of the Clan Irwin Association recommend it to all members of our Study, and to others bearing our Surname.

For more details see FURTHER READING.

James Irvine,

Ashtead, Surrey, UK

Kit 29479 (Orkney 1)

Study Administrator

Trustee, Bonshaw Preservation Trust

Seneschal to the Chief of Irvine of Drum

Member, International Society of Genetic Genealogy


11 November 2021