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The ultimate purpose of this page is to discuss our DNA resultsi.

  • Feel free to discuss this project on the Sinton Family Forum (link in  menu above)
  • Use the Join Project link above  to place an order for a DNA test at Family Tree DNA
  • Contributions to the proejct are welcome (it would be good to upgrade the tests to 67 markers)

Results to date:

Lineage 1: The Southdean SINTONS:


There are several SINTON families with connections to Southdean, but most have no documentary evidence as to how they connect with each other.
The project was kick started with  kits from two different, proven branches of the family of Peter and Janet (DONALDSON) SINTON, the participants being 4th cousins once removed, with Peter (S-1) being the 6th generation from Peter, and Lester (S-2) being the 7th.
Luckily, they matched (36/37), as expected and are therefore the basis of "the" Southdean lineage.
With the addition of other lineages, the modal value  now looks to be that of  Lester (S-2).

Statistically, FamilyTreeDNA shows that from the DNA alone (ie no knowledge of paper trails) the probability that the matching pair share a common ancestor at 6 generations is only 77%.

ySearch hasn't turned up any other matches as yet, at least not with any SINTON surnamed participants, although there are a couple of" matches" at a genetic distance of 3 with an ALEXANDER and a QUARLE.

The  third kit, from a descendant of the family of John SINTON and Alison HALL, who married in Southdean in 1829 has now also proved a match, 35/37, with one of the mismatches being on a faster mutating marker.
His John rather inconveniently died in 1854, the year before civil registration began in Scotland, so exactly where the family fits is open to conjecture.
By straight naming pattern of known children we're looking for a James and  ?? as I don't know of a second daughter.
However he did conveniently give one of his sons a second name of Oliver, so I think we're on reasonably safe ground that his mother might be Barbara OLIVER, and his age fite the baptism in Southdean of a "son to Jas Sinton Clesleepeel" in 1806.  I make this father James highly  likely to be the James who married Barbary OLIVER in 1804, given that Barbara was of Clesleepeel when she was buried in 1809.
Similarly, using Clesleepeel as the connection makes this James highly likely to be the 1772 baptism to James, whom I pick is the one married to Janet OLIVER.

And as to how Peter and James relate?
There are two contemporary, or near contemporary James SINTONs in Southdean and Abbotrule who may or may not be one and the same person, remarrying, as both are carriers.
One is having children 1755 thru 1760 (at least): Thomas, Margaret and James, wife as yet unknown; and the other the above one married to Janet OLIVER (?of Hobkirk) in 1762 and having children at Burnkinford 1763 and Strangeburnfoot 1765 thru 1769 and Burnkinfoot 1772, dying Clesleepeel and buried 1802.
Peter pre-dates the 1762 marriage by several years, but naming pattern of his children do indicate a father James, so my current theory is that he fits in with the earlier James and ?? couple, most likely as the eldest son, given the first we know of is a 1755 Thomas.
Pity the baptisms for the period before 1755 are missing.

The Jedburgh SINTONs have now also shown up as a match, 35/37, with the above modal signature but I have even less clues as to how the tree may be constructed to include them in the overall lineage.  I note that the  theoretical TMRCA calcs below show no more than 10 generations (at 75% probability level).

More participants welcome, particularly if their family has a connection with Southdean (on the Scottish Borders), or are distant cousins of any of the current participants in order to "test" where the mutations crept in.

The Irish Connection

Well begorrah! Which came first, the Irishman or the Scotsman?  Our 5th participant has shown up as a 34/37 match with the Lineage 1 modal, and all of the mismatches are on faster mutating markers, but even so the theoretical calcs below add another 3 generations in at the 75% level.

Time to Most Recent Common Ancestor (TMRCA)

The tables below show the TMRCA values at varying probability levels. These have been generated using Dean McGee's Y-DNA Comparison Utility on the ISOGG pages.
The settings used were for FTDNA Mutation rates, and the infinite allele model for Genetic Distance.
Given the kinown paper trail for S-1 and S-2, the 75% probability table looks the best for the Southdean SINTONs.

50% probability level

Time to Most Recent Common Ancestor (Generations)
ID m
o
d
a
l
S
-
2
S
-
1
S
-
3
S
-
4
S
-
5
modal 37 2 4 7 7 10
S-2 2 37 4 7 7 10
S-1 4 4 37 10 10 12
S-3 7 7 10 37 12 12
S-4 7 7 10 12 37 15
S-5 10 10 12 12 15 37
0-9 Generations 10-19 Generations 20-29 Generations 30-39 Generations
- Infinite allele mutation model is used
- Average mutation rate varies: 0.0054 to 0.0054, from FTDNA derived rates
- Values on the diagonal indicate number of markers tested
- Probability is 50% that the TMRCA is no longer than indicated

75% probability level

Time to Most Recent Common Ancestor (Generations)
ID m
o
d
a
l
S
-
2
S
-
1
S
-
3
S
-
4
S
-
5
modal 37 4 7 10 10 13
S-2 4 37 7 10 10 13
S-1 7 7 37 13 13 17
S-3 10 10 13 37 17 17
S-4 10 10 13 17 37 20
S-5 13 13 17 17 20 37
0-9 Generations 10-19 Generations 20-29 Generations 30-39 Generations
- Infinite allele mutation model is used
- Average mutation rate varies: 0.0054 to 0.0054, from FTDNA derived rates
- Values on the diagonal indicate number of markers tested
- Probability is 75% that the TMRCA is no longer than indicated

90% probability level

Time to Most Recent Common Ancestor (Generations)
ID m
o
d
a
l
S
-
2
S
-
1
S
-
3
S
-
4
S
-
5
modal 37 8 13 16 16 20
S-2 8 37 13 16 16 20
S-1 13 13 37 20 20 24
S-3 16 16 20 37 24 24
S-4 16 16 20 24 37 28
S-5 20 20 24 24 28 37
0-9 Generations 10-19 Generations 20-29 Generations 30-39 Generations
- Infinite allele mutation model is used
- Average mutation rate varies: 0.0054 to 0.0054, from FTDNA derived rates
- Values on the diagonal indicate number of markers tested
- Probability is 95% that the TMRCA is no longer than indicated
free hit  counters


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