MW
Mary Wallace — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wayne-County, Michigan
Our Model Tree links this Mary Wallace across the 1920, 1930 and 1940 US Censuses in Wayne-County, Michigan (XGBoost, ~Confirmed), with identified parents William & Margaret — first a daughter (b.~1909), then head of a 6-person household.
Age 31
b. ~1909
Female
Daughter
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wayne-County, Michigan |
| Surname | Wallace |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Naturalization Status | Alien |
| Additional Details | |
| Occupation | Waitress |
| Industry | Retail Dairy Store |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 400 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Waitress |
| Township / Ward | Detroit City |
| Est. Birth Year | ~1909 |
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 |
|---|---|---|---|---|
| Margaret Wallace | Daughter | — | 21 | ~1919 |
| Mary Wallace | Daughter | — | 31 | ~1909 |
| Anna Pace | Daughter | — | 23 | ~1917 |
| William Wallace | Head | — | 62 | ~1878 |
| Jack Pace | Other | — | 26 | ~1914 |
| Margaret Wallace | Spouse | — | 59 | ~1881 |
Census Appearances
1920
Wayne, Michigan
Daughter, age 10
Wayne, Michigan · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wallace |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1913 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Wayne, Michigan
Daughter, age 20
Wayne, Michigan · implied b. ~1910 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wallace |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| 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 31
Wayne-County, Michigan · implied b. ~1909 — 6 household members
| Surname | Wallace |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Detroit City |
| 1935 Residence (County) | Wayne |
| Naturalization Status | Alien |
| Occupation | Waitress |
| Industry | Retail Dairy Store |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 400 |
| 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 Wallace across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Wallace (~0.92 confidence) and mother Margaret Wallace (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Wallace
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Margaret Wallace
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Wallace
Daughter · 1940 · age 31 · b. ~1909 · Michigan
★ You are viewing this record
Sibling
Anna Pace
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Wallace
Sibling · 1940 · age 21
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-t0627-01876-00695)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Stake Bokhorst | 51 | Sister | — | Netherlands |
| 2 | Ralph Young | 42 | Head | Chauffeur | Michigan |
| 3 | Erna S Young | 39 | Wife | — | Germany |
| 4 | Rolf Young | 5 | Son | — | Michigan |
| 5 | Thomas Matthews | 28 | Head | Druggist | North Carolina |
| 6 | Maggie S Matthews | 24 | Wife | — | North Carolina |
| 7 | Thomas Jr Matthews | 2 | Son | — | Michigan |
| 8 | Philip Matthews | 0 | Son | — | Michigan |
| 9 | Thomas B Routt | 34 | Head | Chauffeur | North Carolina |
| 10 | Maxine R Routt | 31 | Wife | — | Indiana |
| 11 | Thomas B Routt | 1 | Son | — | Michigan |
| 12 | William Routt | 30 | Brother | Laborer | Alabama |
| 13 | Madalene Simmons | 43 | Lodger | Matron | Ohio |
| 14 | George Keay | 60 | Head | Pattern Maker | Scotland |
| 15 | Mary A Keay | 55 | Wife | — | Scotland |
| 16 | May Eleanor Keay | 25 | Daughter | Medical Technologist | Michigan |
| 17 | William S Wallace | 62 | Head | Janitor | Scotland |
| 18 | Margaret Wallace | 59 | Wife | — | Scotland |
| 19 | Mary Wallace THIS PERSON | 31 | Daughter | Waitress | Scotland |
| 20 | Margaret Wallace | 21 | Daughter | Waitress | Michigan |
| 21 | Jack Pace | 26 | Son-in-law | Assembler | Canada |
| 22 | Anna Pace | 23 | Daughter | Saleslady | Michigan |
| 23 | Logan Mulligan | 54 | Head | Comptroller Inspector | Georgia |
| 24 | Alfreda O Mulligan | 52 | Wife | — | Michigan |
| 25 | Suzanne M Mulligan | 22 | Daughter | Parking Lot Attendant | Pennsylvania |
| 26 | Eola Mulligan | 20 | Daughter | Stock Girl | Pennsylvania |
| 27 | Dewitt Mulligan | 16 | Son | — | Canada-English |
| 28 | Maymie Harris | 60 | Head | Cook | Ohio |
| 29 | Miriam Harris | 24 | Daughter | Wood Inlay Worker | Michigan |
| 30 | Otto Kollmorgen | 56 | Son-in-law | Machinist | Michigan |
| 31 | Inez D Kollmorgen | 36 | Daughter | — | Michigan |
| 32 | Phillip G Bowe | 55 | Head | Stationary Engineer | Michigan |
| 33 | Agnes Bowe | 50 | Wife | — | Michigan |
| 34 | Donald Bowe | 24 | Son | Production Man | Michigan |
| 35 | Virgilleene Bowe | 16 | Daughter | — | Michigan |
| 36 | Walter Bowe | 10 | Son | — | Michigan |
| 37 | Anna Stine | 76 | Mother-in-law | — | Ireland |
| 38 | Robert S Lawton | 46 | Head | Salesman | Michigan |
| 39 | Bernice Lawton | 36 | Wife | — | Michigan |
| 40 | Vacant Line | None | — | — | — |
Related Census Records
Pedigree Summary
Mary + 2 siblings
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)