The DNA Geek

In April 1768, one Michel (Miguel) Deville wed Marguerite “Kasteberg” or “Kastzeberg” in St Louis Cathedral, New Orleans, Spanish Louisiana.

AncestryDNA has just updated some of their DNA-based relationship predictions!

This post is not about an individual.

23andMe revolutionized the fields of personal genomics and genetic genealogy when they introduced the first direct-to-consumer autosomal DNA test in 2007.

This update has been updated.

As of late February 2026, I estimate that there are more than 55 million autosomal DNA (atDNA) kits across the four main testing companies: AncestryDNA, 23andMe, MyHeritage, and FamilyTreeDNA.

Last Friday, fetal remains were found in a wastewater treatment plant in Sumter County, South Carolina.

The most frustrating unknown father case I’ve ever worked is “Midge” (not her real name).

Most cultures have taboos against close relatives marrying (or mating with) one another.

This is a developing story and may be updated.