Hi Marie,
Thank you for your thoughtful and informative reply!
As far as origins, here is an excerpt from FTDNA regarding the PETITPAS Haplogroup.
"Haplogroup
I dates to 23,000 years ago, or older. The I-M253 lineage likely has its roots
in northern France. Today it is found most frequently within
Viking/Scandinavian populations in northwest Europe and has since spread down
into Central and Eastern Europe, where it is found at low frequencies.
Haplogroup I represents one of the first peoples in Europe."
We are not trying to prove the genetic relationships between our PETITPAS male Y-DNA participants. We have good documentation of their lineages. Instead, we are hoping to narrow down the home origin of the common ancestor Claude PETITPAS.
One note you mentioned that might help us, is to look at other Acadian Y-DNA that has downstream results from I-M23. We could then test for specific downstream markers, which is much less expensive than Big Y testing. We do not have funds for a Big Y.
Do you have any proven Acadian Y-DNA on your project that has downstream marker results from I-M23?
Best,
Eileen