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Every-Name Index
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Diana, Goddess
of the Hunt — for Ancestors!
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Every-Name Index |
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| Node Chart for the Descendants of Martin STRAUB
(1616-1676) of Württemberg
Ancestor of President Barack OBAMA |
| With the testing of enough cousins, a genetic "tree" of a progenitor's descendants can be constructed showing where in each lineage mutations have occurred. Such a tree can be extremely useful in supporting (or debunking) paper genealogies. The more family members we test (the more lines we test) and the more markers we test, the greater detail the tree will have. Ideally, we would test every living STRAUB/STROUP/etc. male. If you are such a male, please join the project and be tested. |
| Members of this family are matching at a high level, from 63/67 to
96/96, so there is no question that they have a near common ancestor.
Four of the paper descendants of Johann Pieter STRAUB I, grandson of Martin
STRAUB and 1733 immigrant to Pennsylvania, match 67/67, so they are presumed
to carry Johann Pieter's haplotype. We have tested one descendant
of Antonius STRAUB, a brother of Johann Pieter's who stayed in Württemberg.
His 67-marker haplotype differs from Johann Pieter's by one mutation (there
are more differences among the "advanced" markers). Until a descendant
of a third brother or other relative of Martin's is tested (e.g.,
an uncle), we cannot know which haplotype, Johann Pieter's or Antonius's,
is the ancestral one. The mutation distinguishing them among the
"standard" 67 markers is the value of DYS570. For Johann Pieter's
descendants its value is 21; for Antonius's descendant it is 20.
It's worth noting here that DYS570 is the most variable of
any of the standard markers tested by FTDNA and that the modal value for
Haplogroup I1 is 21.
For most of the mutations among those tested (i.e., the differences from the modal haplotype of the family), their mutation is unique to themselves; these are sometimes called "private" mutations. Until more cousins are tested and these indiviuals started getting matches, their private mutations don't tell us much more than we already know. It's when cousins starting matching on their private (non-modal) mutations that we can start finding out where the "nodes," the branches, in the tree are because if two people share a private mutation, we know they must have a common ancestor closer to themselves than the family's progenitor. Or at least we believe they should because these mutations are rare and there is a low probability of the same mutation occuring more than once in the same family in a few generations. At the present time, with 18 people tested to 67 (or more) markers, we have only two such cases (of matching private markers), one of which is helpful because it is congruent with the subjects' paper genealogy and the other of which creates a serious conundrum because either we have to accept the same mutation happened more than once or that we have some serious errors in paper genealogy. |
| I have created two tables, shown below. Chart
1 shows the current results adhering to what is known of the subjects'
paper genealogy. We are pleased to see that one of the shared private
mutations (DYS481=26>25) is shared by #24212 and #119218, who have a common
ancestor in Adam STROUP of Centre and Venango Cos., PA. This mutation
is a case of the DNA supporting the paper genealogy and demonstrating that
it is Adam STROUP who first bore the mutation. We would expect anyone
descended from Adam to also bear this mutation.
The troublesome matches are the two alleged descendants of Johann Pieter who match the descendant of Antonius in being 20 at DYS570. In Chart 1 I resolve the issue be assuming the mutation occurred three times, which is frankly hard to swallow. In Chart 2, I follow the DNA test results rigidly, but doing so is not at all congruent with their paper genealogy. |
| One thing these incongruent results suggest is that Johann Pieter STRAUB I may not have been the only member of this family to immigrate. This has always been a possibility, and it's a classic beginner's mistake in genealogy to pin everyone of the same surname to the one known immigrant, ignnoring the fact that most immigrants leave no record of their arrival, they simply begin appearing in local records. And in this case, there are known STRAUB immigrants whom we instantly lose track of. Even on this short list, most of the immigrants have not been accounted for. |
| I have never been comfortable with the genealogy of the early generations
of this family, that is, the ones in the 18th Century. The records
connecting them are few, and there has always been the danger that we were
connecting too many people to one well-known immigrant (viz.,
Johann Pieter STRAUB I, the 1733 immigrant to Philadelphia). This
problem was greatly compounded by Charles Fisher and his 1938 book,
Snyder
County Pioneers.
Snyder County Pioneers is a collections of hundreds of brief biological sketches. Fisher was an historian, not a genealogist, and if he had good documentation, he rarely cited or quoted it, which makes everything he did automatically suspect. Snyder County Pioneers is a secondary source, and these sketches shouldn't be given any more weight than we would give any other of those county histories from the late 1800s and early 1900s. Yet Fisher's sketch of this family has been accepted uncritically as a "starting point" for the genealogy of the family. It's time to go "back to the drawing board." |
| The issue of DYS570 is not unresolvable, even if we can't find a descendant of a third brother of Johann Pieter and Antonius to test. Four project members, including the descendant of Antonius, have "maxed out" their markers, and there are differences between them among these markers. If the two individuals who are DYS570=20 (viz., #116646 and #23426) would max out their markers, we would be able to tell whether these are multiple mutations or major errors in paper genealogy. In that regard, I would urge everyone to max out their markers if we are going to resolve these and other issues as they arise. |
| Node
Chart for Descendants of Martin STRAUB — assuming the ancestral state of
DYS 570 = 21 and that the mutation to 20 has occurred three
times.
This scenario is the most accomodating to the testees' paper genealogy, but requires that we accept the improbability that the same mutation occurred three times.
This scenario is a conservative interpretation of the DNA test results, but does a good deal of violence to their alleged paper genealogy.
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| Return to Haplogroup I1-AS5 Results table. See also Node Chart comparing Jacob STROUP I and Jacob STROUP II. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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