MM
Mary Mcdonnell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Mary Mcdonnell across the 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a spouse (b.~1885), then head of a 6-person household.
Age 55
b. ~1885
Female
Spouse
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | McDonnell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | Detroit City |
| Est. Birth Year | ~1885 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Bernard Mcdonnell | Son | — | 11 | ~1929 |
| Mary Mcdonnell | Spouse | — | 55 | ~1885 |
| Ronald Mcdonnell | Son | — | 19 | ~1921 |
| Daniel Mcdonnell | Son | — | 22 | ~1918 |
| Mary Mcdonnell | Daughter | — | 18 | ~1922 |
| Dan Mcdonnell | Head | — | 60 | ~1880 |
Census Appearances
1930
Wayne, Michigan
Spouse, age 47
Wayne, Michigan · implied b. ~1883 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | First papers filed |
| Year of Immigration | 1927 |
| Age at First Marriage | 27 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Wayne-County, Michigan
Spouse, age 55
Wayne-County, Michigan · implied b. ~1885 — 6 household members
| Surname | McDonnell |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Naturalization Status | Naturalized |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Mcdonnell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mcdonnell
Spouse · 1940 · age 55 · b. ~1885 · Michigan
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Wayne-County, Michigan
Open full size
1940 US Federal Census — Wayne-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01856-00657)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rose O'Connor | 80 | Mother | — | Michigan |
| 2 | Burl Grogg | 24 | Head | Cleaner | W. Virginia |
| 3 | Betty Grogg | 20 | Wife | — | Michigan |
| 4 | Donald Grogg | 3 | Son | — | Michigan |
| 5 | Girl Grogg | 1 | Son | — | Michigan |
| 6 | Elmer Schraufnagel | 26 | Head | Brick Layer | Wisconsin |
| 7 | Mary Schraufnagel | 26 | Wife | — | Michigan |
| 8 | Beverly Schraufnagel | 5 | Daughter | — | Michigan |
| 9 | Kenneth Schraufnagel | 3 | Son | — | Michigan |
| 10 | Gale Schraufnagel | 0 | Son | — | Michigan |
| 11 | Peter Connors | 56 | Head | Lather | Michigan |
| 12 | Peter Jr Connors | 24 | Son | Laborer | Michigan |
| 13 | Florence Connors | 20 | Daughter | — | Michigan |
| 14 | Frances Meldau | 50 | Head | Stenographer | S. Carolina |
| 15 | B J Smith | 40 | Lodger | Laborer | New York |
| 16 | Mary Brennan | 73 | Lodger | — | Canada |
| 17 | John Biggar | 74 | Head | — | Scotland |
| 18 | Leonora Biggar | 67 | Wife | — | S. Carolina |
| 19 | Francis Mcginley | 34 | Head | Clerk (Clerical) | Pennsylvania |
| 20 | Mary Mcginley | 30 | Wife | — | Pennsylvania |
| 21 | Joan Mcginley | 11 | Daughter | — | Michigan |
| 22 | Donald Mcginley | 10 | Son | — | Michigan |
| 23 | Patricia Mcginley | 8 | Daughter | — | Michigan |
| 24 | Frances Mcginley | 2 | Daughter | — | Michigan |
| 25 | William Mccann | 52 | Head | Bridge Man | Rhode Island |
| 26 | Mamie Mccann | 47 | Wife | — | Indiana |
| 27 | William Mccann | 8 | Son | — | Michigan |
| 28 | John Mccann | 6 | Son | — | Michigan |
| 29 | Ida Marwen | 78 | Head | — | Michigan |
| 30 | Thomas Brecky | 28 | Head | Laborer | Michigan |
| 31 | Margaret Brecky | 28 | Wife | — | Michigan |
| 32 | Dan Mcdonnell | 60 | Head | — | Ireland |
| 33 | Mary Mcdonnell THIS PERSON | 55 | Wife | — | Scotland |
| 34 | Daniel Mcdonnell | 22 | Son | Service Room | Montana |
| 35 | Ronald Mcdonnell | 19 | Son | Run Printing | Scotland |
| 36 | Mary Mcdonnell | 18 | Daughter | — | Scotland |
| 37 | Bernard Mcdonnell | 11 | Son | — | Michigan |
| 38 | Roy Patterson | 50 | Head | Lacking | Canada |
| 39 | Jean Patterson | 53 | Wife | — | Scotland |
| 40 | May Patterson | 24 | Daughter | Waitress | Canada |
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)