Darling DNA – ThruLines – Part 1

ThruLines Thursday

My Wife’s Darling-Swayze-McAllister-Lamb Line


DNA image by Caroline Davis2010 via Flickr (CC BY 2.0)

My wife’s mother has had her DNA tested, so rather than using my wife’s matches, I’m going to use her mother’s matches to focus on my wife’s maternal line. It will provide closer and better matches on that like. Consequently, I’m starting with my wife’s great-great-grandparents, my mother-in-law’s great-grandparents.

One of the problems with ThruLines is that it only considers individuals that match genetically AND have a tree at Ancestry where the individual had identified which person is them. So, my wife’s half-aunt who did test with Ancestry doesn’t show up at all because she doesn’t have a tree. Because of that, there were no matches with my wife’s four maternal great-grandparents (other than my wife’s mother).

DNA Relationships

Likewise, there were no ThruLines matches with my wife’s Darling or Swayze 2nd great-grandparents. However, there were three matches on the McAllister/Lamb lines.

There is “CM,” who is a 2nd cousin of my wife’s mother and is well known to us. The 101 cM of DNA shared between them is well within the expected range for 2nd cousins.  No surprise there.

The other two are descendants of my mother-in-law’s great-uncle Joseph McAllister.  “CK” and my mother-in-law share 176 cM of DNA across 11 segments and “IG” and my mother-in-law share 99 cM of DNA across 4 segments. Both within the range expected for second cousins to share. Both “CK” and “IG” were unknown cousins before the DNA test match results, however, both their parents were known.


If you are a descendant of Rufus Holton Darling (1815-1857), Elizabeth Jane Swayze (1818-1896), Peter McAllister (1852-1941), or Margaret Mary Lamb (1850-1929),  please consider testing with Ancestry DNA; it is an excellent genealogical resource and can help you broaden your tree too. I’d love to learn how you and my wife are related.


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All of my ThruLines posts are listed under the ThruLines Thursday category

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