You must be away with the fairies again.Using DNA to trace deep ancestry is deeply flawed.
Astrology would be more reliable.
"Astrology has not demonstrated its effectiveness in controlled studies and has no scientific validity, and is thus regarded as pseudoscience."
Astrology and science - Wikipedia
en.wikipedia.org
"Studies have shown that DNA evidence is 99% accurate, making it one of the most foolproof pieces of evidence you can possibly use in court."
How Accurate Is DNA Evidence? | Shevin Law Group
DNA evidence is frequently used in criminal trials in California. This type of evidence can be collected from blood, bodily fluids, skin cells, hair, or anything else that was left at the crime scene.
www.shevinlaw.com
There is a recognised and accepted problem with identifying sufficient samples of French DNA to make accurate lineage analyses due to the current French legal restraints of applying for and providing random samples of DNA for "private interest".
But there is no restriction on applying for, sending and receiving DNA samples and results from abroad for that "private interest".
It just currently makes identifying French DNA in lineage enquiries less accurate than other nationalities due to the fewer available results for comparisons.