I red the thesis Du fonctionnement des sites funéraires aux processus de néolithisation sur le territoire français (néolithique ancien et moyen) : premiers apports de l’approche paléogénétique by Maïte Rivollat, in page 212 there is a table with SNP results for a person buried 7 millenia ago in Germignac (western France), mtDNA calls point to T; calls for Y-DNA are few but from the 4 samples from 2 teeth the lab got 3 calls for M343 (which defines R1b): it's to much to be a coincidence or contamination...

The cultural assignment of the individual was difficult: Cerny? Cardial? Mesolithic?