DNA & Haplogroups
What molecular genetics reveals about fifteen generations of documented ancestry — and what it cannot tell you. DNA confirms the deep biological lineage. Parish records identify the specific people. The real power is the combination.
H
mtDNA Haplogroup
15
Maternal Generations
~20,000
Years in Europe
507
Verified Ancestors
I. What DNA Tells Us
Human DNA contains three distinct genetic systems, each of which tells a different story about ancestry. Understanding what each one can and cannot reveal is essential before interpreting any test result.
Autosomal DNA
The DNA you inherit from all your ancestors — a roughly equal mix from both parents, which means about 50% from each parent, 25% from each grandparent, 12.5% from each great-grandparent, and so on. By the time you go back ten generations (~300 years), each ancestor contributes less than 0.1% of your autosomal DNA. This is the DNA that commercial ancestry tests like 23andMe and AncestryDNA analyze. It is excellent for identifying relatives within about five or six generations, but becomes unreliable beyond that.
Mitochondrial DNA (mtDNA)
A small circular genome inherited exclusively from your mother. Your mother inherited it from her mother, who inherited it from her mother, in an unbroken chain going back tens of thousands of years. mtDNA mutates very slowly, so it traces the deep maternal lineage — not the last few generations, but the last few hundred generations. It assigns you to a “haplogroup”: a branch on the human maternal family tree defined by specific mutations that accumulated over millennia.
Y-Chromosome DNA
Inherited only by males, from father to son. Like mtDNA, it traces a single line — the paternal surname line — deep into the past. Y-DNA haplogroups identify the ancient population your paternal line descends from. Because surnames typically follow the paternal line, Y-DNA can confirm or refute whether two people with the same surname share a common male ancestor.
The key insight is this: autosomal DNA dilutes by half each generation, so it cannot reach the colonial period. But mtDNA and Y-DNA each trace a single unbroken line that never dilutes. They are the two threads that run all the way back.
II. The Maternal Line (mtDNA)
Carl carries mitochondrial haplogroup H, the most common European haplogroup. This assignment places his unbroken maternal line within a population history that stretches back approximately 20,000 to 25,000 years.
Haplogroup H: Origins and Distribution
Haplogroup H originated in Southwest Asia (the Near East or Western Asia) approximately 20,000 to 25,000 years ago, during the Last Glacial Maximum — the coldest period of the last Ice Age, when ice sheets covered northern Europe and human populations were confined to southern refugia. As the climate warmed and the ice retreated, haplogroup H expanded across Europe with the re-colonizing populations. Today, approximately 40 to 50 percent of Western Europeans carry haplogroup H, making it by far the most common maternal lineage on the continent. It is especially prevalent in the Iberian Peninsula, France, the British Isles, and Scandinavia.
What this means in genealogical terms: the maternal line that runs from Cécile Olivier (~1605, Bracquemont, Normandy) through fifteen generations of documented mothers to Carl today has been in Europe for at least 20,000 years. The paper trail covers four centuries. The DNA trail covers two hundred centuries.
The Unbroken Maternal Chain
Each woman passed her mitochondrial DNA to the next. This chain is unbroken — every link is documented in parish records.
Cécile Olivier
~1605Bracquemont, Normandy, France
Earliest known maternal ancestor. Born in France before the founding of Quebec.
Noëlle Asselin
~1632–1710Bracquemont → Sainte-Famille, Île d’Orléans
Crossed the Atlantic. Among the earliest settlers of Île d’Orléans.
Françoise Durand
~1651–1717Paris → Sainte-Famille, Île d’Orléans
Fille du Roi #117 on Yves Landry’s definitive list. Arrived 1670 on La Nouvelle France.
Françoise Beaudoin
1676–1765Sainte-Famille → Berthier-sur-Mer
Lived to 88. Outlived New France itself — died six years after the Conquest.
Marie-Josephe Blais
1720–1791St-Vallier → St-Jean, Île d’Orléans
Married at 14. Husband was militia captain during the British siege of 1759.
Marie-Josephte Blouin
1736–1788St-Jean, Île d’Orléans → St-Michel, Bellechasse
Fourteen children. Married four years before the fall of New France.
Apolline Lacroix
1761–1829St-Michel → St-Jean-Baptiste-de-Rouville
First generation born under British rule. Migrated from Bellechasse to the Richelieu Valley.
Apolline Lacasse
~1786–?St-Michel → St-Hyacinthe
Signed her own name when every man at her wedding could not.
Cordélie Bernier
~1812–?St-Damase, Richelieu Valley
Born during the War of 1812. Lived through the Patriote Rebellion of 1837.
Apolline Decelles
1836–~1872St-Damase → Verchères
Died at approximately 36. Three generations of Apollines end here.
Mélanie Goyette
1855–1942Quebec → Lowell, Massachusetts
Last generation born in Quebec. Emigrated during La Grande Hémorragie.
Rose Lea LaFlamme
1886–1976St-Valérien de Milton → Lowell, MA
Last born in Canada. Married a Highland Scot — joining two Atlantic migrations.
Claire
1924–Lowell, Massachusetts
Jolene
Carl
Carries mitochondrial haplogroup H. The unbroken maternal line continues.
III. What the Paper Trail Shows vs. What DNA Shows
The paper trail and the DNA tell different stories at different scales, and understanding where they overlap and where they diverge is essential.
The Paper Trail
- •15 generations of documented mothers, each confirmed in parish records
- •507 total verified ancestors across 75 lines
- •Names, dates, parishes, occupations, witnesses, signatures
- •Reaches back to the 1600s with individual-level precision
- •Cannot go beyond the written record (~1600 in Quebec)
The DNA
- •Confirms European origin of the maternal line
- •Places the lineage within haplogroup H (~20,000+ years in Europe)
- •Cannot distinguish French from other Western European lineages at this level
- •Cannot identify specific individuals beyond ~5–6 generations
- •Extends the timeline back 20,000+ years where records cannot reach
The real power is the combination. The paper trail identifies the specific people: Cécile Olivier in Bracquemont, Noëlle Asselin on the Île d’Orléans, Apolline Lacasse in St-Hyacinthe. The DNA confirms the biological lineage: these women are connected by an unbroken chain of maternal inheritance that molecular evidence independently verifies.
A Note on the Wendat Line
Catherine Annennontak, of the Wendat Bear Clan (Attignawantan), appears in the ancestry nine generations back. At that distance, her autosomal DNA contribution would be approximately 0.2% — about 1 part in 512. This is below the threshold of reliable detection by current commercial DNA tests. A standard autosomal DNA test might or might not detect Indigenous ancestry at this level; the signal is simply too faint. The paper trail, however, is unambiguous: her marriage to Étienne Banliac dit Lamontagne is recorded in the parish registers, and the descent through subsequent generations is confirmed in both Nos Origines and Drouin.
IV. Population Genetics of New France
New France is one of the most studied populations in human genetics, and for good reason. Approximately 10,000 French settlers founded a population that today numbers in the millions. This makes Quebec a textbook example of the founder effect — a phenomenon in which a small founding population shapes the genetic profile of all its descendants.
The Founder Effect in Numbers
~10,000 settlers founded the French-Canadian population between 1608 and 1760. Of these, roughly 3,400 were permanent settlers who stayed and had descendants. The rest were soldiers, traders, or administrators who returned to France.
~2,600 of the original settlers appear as ancestors of the average modern French Canadian. This is not a misprint. Due to the small founding population and high birth rates, most French Canadians today descend from the majority of the original settlers.
The consequences of this founder effect are visible in the genetics of modern Quebec. Because the founding population was small, certain genetic variants that were rare in France became much more common in Quebec through random drift and the exponential growth of a few founding families. Several genetic conditions occur at significantly higher rates in French Canadians than in other populations:
- •Leber hereditary optic neuropathy (LHON) — a mitochondrial condition causing sudden vision loss, traced to a small number of founding mothers
- •Myotonic dystrophy type 1 — the most common adult muscular dystrophy in Quebec, with a prevalence roughly 10 times the global average
- •Tyrosinemia type I — a metabolic disorder especially prevalent in the Saguenay–Lac-Saint-Jean region, traced to a single founding couple
These patterns are not defects of the population. They are the predictable consequence of a small group of people producing millions of descendants. The same founder effect that made certain rare conditions more common also made certain common traits nearly universal.
The Filles du Roi Connection
Ten Filles du Roi appear in Carl’s verified ancestry. These ten women were part of the roughly 770 “King’s Daughters” sent to New France between 1663 and 1673 to address the colony’s severe gender imbalance. The Filles du Roi are among the most important founders of the French-Canadian population: researchers estimate that approximately two-thirds of all modern Quebecers descend from at least one Fille du Roi. Their genetic contribution is vastly disproportionate to their numbers, because they arrived at the moment when the colony’s population was about to enter its period of fastest growth.
V. Limitations
DNA testing is a powerful tool, but it is important to understand what it cannot do. Much of the marketing around consumer DNA tests oversells their genealogical capabilities. Here is what the science actually supports.
DNA alone cannot trace specific ancestors
A DNA test tells you about population-level origins, not individual lineages. It can tell you that your maternal line is of Western European origin (haplogroup H), but it cannot tell you that your eighth-great-grandmother was Cécile Olivier from Bracquemont, Normandy. Only the parish records can do that. DNA and documents answer different questions at different scales.
Autosomal DNA fades after 5–6 generations
Because autosomal DNA halves each generation, an ancestor from seven generations back contributes less than 1% of your genome. By ten generations (~300 years), the contribution is about 0.1% and may not be detectable at all. All of the colonial-era ancestors in this tree are beyond the reliable range of autosomal DNA detection. The connection to them rests entirely on the documentary record.
Ethnicity estimates are approximations
The “ethnicity estimate” or “ancestry composition” that commercial DNA tests provide (e.g., “64% French, 22% British”) is a statistical model, not a measurement. Different companies use different reference populations and different algorithms, which is why the same person often gets different ethnicity breakdowns from different companies. These estimates are broadly directional but should not be treated as precise measurements.
Parish records are far more precise than DNA for genealogy
For the specific purpose of tracing family lines, the Quebec parish registers are more precise, more reliable, and more informative than any DNA test. DNA is most useful for three things: confirming paper trails where there is doubt, identifying unexpected ancestry that the paper trail missed, and breaking through brick walls where records do not exist. If the records exist — and in Quebec, they almost always do — the documents are the primary evidence and DNA is supplementary confirmation.
The bottom line: DNA extends the story beyond the reach of written records, confirming that the maternal line has been in Europe for twenty millennia. But for the four centuries that matter most — the generations of named, documented people — the parish registers remain the indispensable source.