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James Blair & Mary (Colbert?)

Conventional Research
The James Blair - Mary (Colbert?) line is the most researched BSGR line. 48 past and present members are researching this line. The (?) assosicated with Mary's last name is because no one knows for certain exactly who James married. In fact, much about this line is unknown, unproven or not documented. It is believed that James and Mary had two sons, Colbert and James. It is also possible that James had a third son, John, by a second wife.

DNA Testing
Six participants believe they descend from James Blair - Mary (Colbert?).  All of them descend through Colbert Blair and Sarah Morgan. Four (#75036, #83525, #129038, #140666) descend through Colbert's son James, one (#5674) descends through Colbert's son John and one (#14934) descends through Colbert's son Enos.

All six participants tested at least 25 markers. The number of mismatches each had with others is shown in the following table:

25 Marker Mismatches
  5674 14934 75036 83525 129038 140666
5674   15 9 9 9 9
14934 15   14 14 14 14
75036 9 14   0 0 0
83525 9 14 0   0 0
129038 19 14 0 0   0
140666 9 14 0 0 0  

Three participants (#75036, #83525, and #140666) tested at 37 markers and match 37/37.

Participant #5674 is haplogroup Q. Participant #14934 is haplogroup E1b1b1. Participants #75036, #83525, #129038, and #140666 are all haplogroup R1b1b2.

The actual marker values for each participant are shown in the table below.

Marker 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37
  DYS#
PART
ID#
3
9
3
3
9
0
1
9
*
3
9
1
3
8
5
a
3
8
5
b
4
2
6
4
3
8
4
3
9
3
8
9
i
3
9
2
3
8
9
ii
4
5
8
4
5
9
a
4
5
9
b
4
5
5
4
5
4
4
4
7
4
3
7
4
4
8
4
4
9
4
6
4
a
4
6
4
b
4
6
4
c
4
6
4
d
4
6
0
G
A
T
A
H
4
Y
C
A
II
a
Y
C
A
II
b
4
5
6
4
0
7
5
7
6
5
7
0
C
D
Y

a
C
D
Y

b
4
4
2
4
3
8
John Blair II (b. 1764) and Frances Hill
5674 13 23 13 10 13 20 12 12 13 12 14 28 17 9 10 11 11 21 14 19 30 15 16 16 17                        
Enos Blair (b. 1750) and Hannah Millikan
14934 13 24 13 10 16 17 11 12 12 13 11 30 16 9 9 10 11 25 14 20 31 14 16 16 17                        
James Blair (b. 1761) and Elizabeth Powell and Elizabeth Powell
75036 13 24 14 11 10 14 12 12 12 13 13 29 17 9 10 11 11 22 14 19 30 15 16 16 17 10 11 19 24 15 15 15 17 35 37 12 12
83525 13 24 14 11 10 14 12 12 12 13 13 29 17 9 10 11 11 22 14 19 30 15 16 16 17 10 11 19 24 15 15 15 17 35 37 12 12
129038 13 24 14 11 10 14 12 12 12 13 13 29 17 9 10 11 11 22 14 19 30 15 16 16 17                        
140666 13 24 14 11 10 14 12 12 12 13 13 29 17 9 10 11 11 22 14 19 30 15 16 16 17 10 11 19 24 15 15 15 17 35 37 12 12

The diagram below show the pedigrees of the six participants based on conventional research.

bsgr122

Conclusions
DNA test results are both conclusive and yet inconclusive. On one hand the 3 distinct lines back to Colbert Blair (son of John Blair and Mary Colbert?) and Sarah Morgan are clearly NOT related. They have 3 distinct 25-marker signatures and 3 distinct haplogroups that clearly show that these three lines do not share a common ancestor.

One the other hand, the four descendants of James Blair son of Colbert, are almost certainly related. Not only do they match each other exactly, but they do not match anyone else in the project.

Unfortunately there is no way to know which of these three lines actually descends from Colbert Blair and Sarah Morgan. We also have no way of knowing if any of these participants actually descends from James Blair and Mary (Colbert?). Further testing is required.

This WebPage was last updated 07/31/2010

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