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Mary Buchanan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Mary Buchanan across the 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Female
Daughter
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Buchanan |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Detroit |
| 1935 Residence (County) | Wayne |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Billing Machine |
| Industry | Paint & Varnish Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Billing Machine |
| Township / Ward | Detroit |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Archie Buchanan | Son | — | 27 | ~1913 |
| Lorraine Buchanan | Daughter | — | 25 | ~1915 |
| Mary Buchanan | Daughter | — | 23 | ~1917 |
| Samuel Buchanan | Son | — | 19 | ~1921 |
| John Buchanan | Son | — | 17 | ~1923 |
| Archibald Buchanan | Head | — | 51 | ~1889 |
| Martha Buchanan | Spouse | — | 51 | ~1889 |
Census Appearances
1930
Wayne, Michigan
Daughter, age 13
Wayne, Michigan · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Buchanan |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | First papers filed |
| Year of Immigration | 1926 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Wayne-County, Michigan
Daughter, age 23
Wayne-County, Michigan · implied b. ~1917 — 7 household members
| Surname | Buchanan |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Detroit |
| 1935 Residence (County) | Wayne |
| Naturalization Status | Naturalized |
| Occupation | Billing Machine |
| Industry | Paint & Varnish Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H 4 |
| 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 Buchanan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Buchanan
Daughter · 1940 · age 23 · b. ~1917 · Michigan
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Sibling
Archie Buchanan
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Samuel Buchanan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorraine Buchanan
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Buchanan
Sibling · 1940 · age 17
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 — 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-t0627-01888-00075)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Beatrice F. Booth | 44 | Head | — | Michigan |
| 2 | John E. Booth | 25 | Son | Tool & Die Maker | Michigan |
| 3 | Helen F. Booth | 25 | Daughter | — | Texas |
| 4 | Howard J. Booth | 15 | Grandson | — | Michigan |
| 5 | Sandra L. Booth | 5 | Granddaughter | — | Michigan |
| 6 | Russell G. Clements | 45 | Head | Foreman Spring Dept | Ohio |
| 7 | Alta Clements | 47 | Wife | — | Ohio |
| 8 | Virginia M. Clements | 22 | Daughter | Typist | Ohio |
| 9 | Ruth L. Clements | 19 | Daughter | Nurse Girl | Michigan |
| 10 | Howard R. Clements | 9 | Son | — | Michigan |
| 11 | Frank J. Grant | 39 | Head | District Auditor | California |
| 12 | Jean V. Grant | 28 | Wife | — | Illinois |
| 13 | Joan F. Grant | 4 | Daughter | — | Michigan |
| 14 | Archibald Buchanan | 51 | Head | Lathe Machinist | Scotland |
| 15 | Martha W. Buchanan | 51 | Wife | — | Scotland |
| 16 | Archie Buchanan | 27 | Son | Chemist | Scotland |
| 17 | Lorraine H. Buchanan | 25 | Daughter | Typist | Scotland |
| 18 | Mary M. Buchanan THIS PERSON | 23 | Daughter | Billing Machine | Scotland |
| 19 | Samuel C. Buchanan | 19 | Son | Bookkeeper | Scotland |
| 20 | John M. Buchanan | 17 | Son | — | Scotland |
| 21 | Arthur P. Woodworth | 47 | Head | Owner | Canada |
| 22 | Pearl M. Woodworth | 40 | Wife | Clerk | England |
| 23 | Philip A. Mackinder | 34 | Head | Accountant | Michigan |
| 24 | Rosalie C. Mackinder | 30 | Wife | Stenotype Operator | Illinois |
| 25 | Shirley Mackinder | 4 | Daughter | — | Michigan |
| 26 | Dorothy E. Williams | 8 | Step Daughter | — | Michigan |
| 27 | Lorenzo L. Newey | 45 | Head | Night Superintendent | Connecticut |
| 28 | Gladys C. Newey | 45 | Wife | — | Massachusetts |
| 29 | Robert B. Newey | 22 | Son | Auditorium Helper | Massachusetts |
| 30 | Barbara J. Newey | 20 | Daughter | Stenographer | Connecticut |
| 31 | Alfred H. Smith | 32 | Head | Branch Manager | Canada English |
| 32 | Louise C. Smith | 31 | Wife | — | Michigan |
| 33 | Thelma L. Smith | 8 | Daughter | — | Michigan |
| 34 | Barbara C. Smith | 4 | Daughter | — | Michigan |
| 35 | Charles Fleming | 60 | Head | Grinder Machinist | New York |
| 36 | Mary Fleming | 61 | Wife | — | Pennsylvania |
| 37 | Edward Mcdonough | 42 | Head | Small Repair Steel | Canada English |
| 38 | Anne F. Mcdonough | 44 | Wife | — | Northern Ireland |
| 39 | Francis M. Mcdonough | 12 | Daughter | — | Michigan |
| 40 | Maureen A. Mcdonough | 7 | Daughter | — | Michigan |
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)