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Welcome to the Deaton DNA Project!  


As a Family Tree DNA surname project we invite and encourage everyone with a Deaton (or similar surname) family background to join us. There is no requirement to be a male Deaton.  All FTDNA members including both males and females with Family Finder results can join the project via their FTDNA home page.  AncestryDNA and 23andme members can join the project by transferring their autosomal raw data to FTDNA for free. If you have Deaton ancestors this project is for you!


Y-DNA STR Results


Currently one Y-STR lineage has been identified within the project.


The eight men who form Lineage I appear to be very closely related.  These men all appear to be descended from Thomas Elijah Deaton and Mary Corington.  Thomas Elijah Deaton  was born in England in 1679 and migrated to the new world in 1700.  Mary Corington migrated two years later.  Thomas and Mary had as many as eight sons and one daughter.  The Deaton family is well documented  with two excellent genealogies available on-line.  


Men in this group are named Deaton, Deyton and Phillips.  Deyton is an alternative spelling that came into use in western North Carolina in the late eighteenth and early nineteenth centuries by the sons of William Deaton, one of Thomas's sons.  There are several explanations for this change in spelling.  The most likely is that standardized spelling had not yet been established.  It is thought that pronunciation was the same for both spellings.  Phillips (also spelled Philips and Philipps in some documents) appears to have been the maiden name of Martha Philips.  Her son Samuel, born in 1828,  used Philips as his surname.  Y-DNA has confirmed that his father was almost certainly Eldridge Deyton.


In this group there are currently two Y-111 tests, six Y-64 tests and one Y-37 test.  Note that not all results have been posted as of this writing and that there are several pending test results


The DNA haplotype of this group is uniform at both 37 and 67 markers with only 6 ySTR mutations occurring at 67 markers. Of these, two project members have a CDYb value of 40 (while the other four who have tested this marker all have a value of 39). More data is required to determine if this mutation might be associated with Thomas’s son James Elijah and his descendants.  


Using published Time To Most Recent Ancestor (TMRCA) calculators it would appear that these eight men are related within 90 to 360 years, with one outlier showing 450 years.  (This estimate will likely drop when his Y-25 to Y-37 results are available.)


Three Kits have identical results at 67 markers.  Of these three men, two are uncle/nephew and the third is a 5th cousin 2X removed from the nephew.  They share a common ancestor in Eldridge Deyton who was born in 1775.  Based on this identical result, it can be deduced that each ancestor for both lines (up to and including Eldridge Deyton) had the exact 67 marker DNA profile.  


Y-SNP and Big Y Results


Lineage I men belong to the Irish Sea Modal Haplogroup which is a subclade of R1b-Z255.  All lineage I members will likely test positive for the SNP R1b-L159, which is downstream of Z255 and is officially recognized by FTDNA and ISOGG.  One lineage I member has taken Family Tree DNA’s Big Y test and has multiple novel variants downstream of L159.  One of these, R1b-Z16434 appears to form a major sublcade of R1b-Z255.  To date four of the eight lineage I members have tested positive for this newly discovered SNP, which will likely be added to the ISOGG in the next revision.  


A second lineage one member recently ordered a Big Y test.


Autosomal DNA 


Currently there are fourteen project members who have Family Finder atDNA results. The project needs more atDNA members and we hope to have 50 or more autosomal members this year.  Members are encouraged to share their Deaton family pedigrees by posting them on the project pedigrees page.


Please post any questions or information on the project forum or contact Jim Phillips, project co-administrator at


Please visit the Patriarchs, y-Results, Forum and Pedigreees pages for additional information.


Thank you!


Related links:


Online Deaton genealogies:


Sons and Daughters of Thomas Deaton by Lawson Alexander Deaton, Jr.

Volume I can be downloaded at


Descendants of Thomas Deaton by Cynthia Smithdeal

Available for download at


Link to Alex Williamson’s R1b-Z255 Big Tree showing Big Y results for project member Phillips, Kit 275787:


Group admins

Project Administrators