Anjou, DNA is great when you use it in conjunction with a paper trail. If you think about it, how many women are "confused" about paternity and simply list the most advantageous candidate? There is sure to be at least one of these if you go back through your family far enough and then you are on the wrong track even though the paperwork is seemingly OK.
Another advantage of DNA is that it can take you back in time past written history
or help if records are missing. (My mother was orphaned in China
, all records missing).
With DNA I found that my wife is related to my mother (!) probably through the Orkney Islands which were a great trading hub centuries ago.
My wife also found recently that she is the same haplogroup as the "Iceman" found in the alps some years ago.
Also found that my English
ancestors arrived there as conscripted Syrian archers marched there by the Romans to defend Hadrian's Wall.
On the other hand my Finnish sea captain
great grandfather has a written pedigree which goes back to the 1400's and I have the paperwork to show that other rels were bargemen on the Thames in the 1700's.