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Mary Byrne — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Le-Sueur-County, Minnesota
Our Model Tree links this Mary Byrne across the 1930 and 1940 US Censuses in Le-Sueur-County, Minnesota (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 8-person household.
Age 17
b. ~1923
Female
Daughter
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Le-Sueur-County, Minnesota |
| Surname | Byrne |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Derrynane Twp |
| 1935 Residence (County) | Le Sueur |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same House |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Derrynane Twp |
| Est. Birth Year | ~1923 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lucille Byrne | Daughter | — | 16 | ~1924 |
| Alice Byrne | Daughter | — | 18 | ~1922 |
| Mildred Byrne | Daughter | — | 12 | ~1928 |
| Kay Byrne | Daughter | — | 7 | ~1933 |
| Mary Byrne | Daughter | — | 17 | ~1923 |
| Richard Byrne | Head | — | 48 | ~1892 |
| James Byrne | Son | — | 9 | ~1931 |
| Cecelia Byrne | Spouse | — | 47 | ~1893 |
Census Appearances
1930
Le Sueur, …
Daughter, age 7
Le Sueur, Minnesota · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Byrnes |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Le-Sueur-County, Minnesota
Daughter, age 17
Le-Sueur-County, Minnesota · implied b. ~1923 — 8 household members
| Surname | Byrne |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Derrynane Twp |
| 1935 Residence (County) | Le Sueur |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same House |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Byrne across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Byrne
Daughter · 1940 · age 17 · b. ~1923 · Minnesota
★ You are viewing this record
Sibling
Lucille Byrne
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Byrne
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kay Byrne
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Byrne
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Byrne
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Le-Sueur-County, Minnesota
Open full size
1940 US Federal Census — Le-Sueur-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01933-00056)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Daniel Herliky | 79 | Head | — | Eire |
| 2 | John Callahan | 60 | Head | Salesman | Minnesota |
| 3 | Clara Callahan | 52 | Wife | Saleswoman | Minnesota |
| 4 | Bertha Callahan | 16 | Daughter | — | Minnesota |
| 5 | Margrete Callahan | 14 | Daughter | — | Minnesota |
| 6 | Agnes Callahan | 12 | Daughter | — | Minnesota |
| 7 | John Callahan | 7 | Son | — | Minnesota |
| 8 | Dennis Holloran | 70 | Head | — | Minnesota |
| 9 | Margret Holloran | 66 | Wife | — | Minnesota |
| 10 | Howard Holloran | 21 | Son | — | Minnesota |
| 11 | John Merry | 76 | Head | — | Minnesota |
| 12 | Mary Merry | 73 | Wife | — | Minnesota |
| 13 | Margaret Burns | 68 | Head | — | Minnesota |
| 14 | Richard Byrne | 48 | Head | Farmer | Minnesota |
| 15 | Cecelia Byrne | 47 | Wife | — | Minnesota |
| 16 | Alice Byrne | 18 | Daughter | — | Minnesota |
| 17 | Mary Byrne THIS PERSON | 17 | Daughter | — | Minnesota |
| 18 | Lucille Byrne | 16 | Daughter | — | Minnesota |
| 19 | Mildred Ann Byrne | 12 | Daughter | — | Minnesota |
| 20 | James Byrne | 9 | Son | — | Minnesota |
| 21 | Kay Byrne | 7 | Daughter | — | Minnesota |
| 22 | Frank Modriesky | 31 | Head | Farm Labor | Minnesota |
| 23 | Michel Moore | 66 | Head | Farm Laborer | Michigan |
| 24 | Sarah Moore | 63 | Wife | — | Minnesota |
| 25 | Nicholas Moore | 27 | Son | Laborer | Minnesota |
| 26 | John Ronayne | 51 | Head | Farmer | Minnesota |
| 27 | Susanna Ronayne | 45 | Wife | — | Minnesota |
| 28 | Donald Ronayne | 23 | Son | Helping On Farm | Minnesota |
| 29 | Lillian Ronayne | 17 | Daughter | — | Minnesota |
| 30 | Agnes Ronayne | 14 | Daughter | — | Minnesota |
| 31 | Bernard Retha | 31 | Head | Farmer | Minnesota |
| 32 | Florence Retha | 31 | Wife | — | Minnesota |
| 33 | James Retha | 10 | Son | — | Minnesota |
| 34 | Jerome Retha | 7 | Son | — | Minnesota |
| 35 | Patricia Retha | 6 | Daughter | — | Minnesota |
| 36 | Orrin Retha | 3 | Son | — | Minnesota |
| 37 | Laurel Retha | 1 | Daughter | — | Minnesota |
| 38 | Joseph Zimmerman | 67 | Head | — | Minnesota |
| 39 | John Whalen | 43 | Head | Farmer | Minnesota |
| 40 | James Whalen | 40 | Brother | — | Minnesota |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)