http://thesesups.ups-tlse.fr/1392/

That is the PhD thesis of Marie Lacan, in French. It was posted at
World Families by Bernard Secher.

I don't read French, so I am depending on others and on Google Translate,
but apparently the remains of two males from the Dolmen of La Pierre
Fritte, Yermenonville, Eure et Loire, France, circa 2800 BC, tested I2a1.

More non-R1b Neolithic y-dna results, from an area that today is predominantly R1b.