The Top 10 Ancestral Surnames across my Ancestry DNA Matches Surprised Me

In May 2018 I downloaded the direct line ancestral surnames of all my DNA matches at Ancestry. I discussed some statistical analysis on the numbers in a previous post. I then conducted some exploratory data mining of the distribution of surnames across my matches. My paternal line is African (not African-American), and I have very … Read more The Top 10 Ancestral Surnames across my Ancestry DNA Matches Surprised Me

Measuring the Usefulness of Trees of my Ancestry DNA Matches

Previously I discussed an analysis of the availability of trees across all my DNA matches. The headline figures from May 2018 were 40% of my matches had a public linked tree 27% had no linked tree but had at least one public unlinked tree 7% had a private tree 26% had no tree A total … Read more Measuring the Usefulness of Trees of my Ancestry DNA Matches

How to count your total number of matches on AncestryDNA

Those of you who have been using Ancestry for a while will remember that once upon a time the display showed the total number of matches, but that has been removed. There is a way of calculating the number using the website alone, which just requires a bit of methodical clicking to identify the last … Read more How to count your total number of matches on AncestryDNA

A brief technical overview of data mining dna matches on Ancestry

The purpose of this blog is to present some analysis of the available data from several DNA testing companies for one or more DNA kits. This post is a high-level description of how the data is retrieved and analysed from AncestryDNA. AncestryDNA presents “Match List Pages” with each match as a row displaying the user … Read more A brief technical overview of data mining dna matches on Ancestry

How many Irish cousins: the impact of endogamy- Part 4 in Series

In previous posts I described the calculations used by several sources to predict the number of cousins we have at different degrees of cousinship (first, second etc). The calculations assume that our ancestors are not related to each other i.e. no first-cousin marriages or other types of inbreeding. If we have a significant number of … Read more How many Irish cousins: the impact of endogamy- Part 4 in Series

How many Irish cousins: according to AncestryDNA – Part 3 in Series

My previous blog post was on research by scientists at 23andMe on predicting our number of cousins. I applaud 23andMe for the publication of the research in detail. AncestryDNA have also researched the topic but as far as I can find, they release the information through the marketing department with big headline numbers and not … Read more How many Irish cousins: according to AncestryDNA – Part 3 in Series

How many Irish cousins: according to 23andMe – Part 2 in Series

Yesterday I wrote a blog post based on an entertaining article from Tim Urban to calculate our number of cousins at various distances using birth rate statistics. Today’s post is based on an academic study by researchers from 23andMe (Henn et al) which covers a wealth of complex analysis that includes a table of “expected … Read more How many Irish cousins: according to 23andMe – Part 2 in Series