I submitted dad’s DNA with Ancestry YDNA Test. The DNA results show the Genetic community where our ancestors lived in past few hundred years was French Settlers of Montreal & Metro Detroit. There are 8 ethnic regions where our ancestors came from hundreds to thousands of years ago.
How the Test works:
Ancestry creates estimates for your genetic ethnicity by comparing your DNA to the DNA of other people who are native to a region. The AncestryDNA reference panel (version 2.0) contains 3,000 DNA samples from people in 26 global regions. Ancestry built the reference panel from a larger reference collection of 4,245 DNA samples collected from people whose genealogy suggests they are native to one region. Many of these samples were originally collected by the Sorenson Molecular Genealogy Foundation.
Jolicoeur Genealogy 
BTW, my 4th great-grandmother’s name was Marie Amable Lachaine Jolicoeur. Se was married to Simon Pierre Sureau Blondin – Jeff Marceil
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I have a first cousin 4 times removed named Adeline Belec who married a Isidore Blondin in 1861 in Ste-Adele, Deux Montagnes, Quebec. I have a few surnames with Lachine but none with Lachine Jolicoeur.
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