MS
Mary Simpson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Macomb-County, Michigan
Our Model Tree links this Mary Simpson across the 1930 and 1940 US Censuses in Macomb-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 10-person household.
Age 11
b. ~1929
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Macomb-County, Michigan |
| Surname | Simpson |
| Given Name | Mary Alice |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Clawson |
| 1935 Residence (County) | Oakland |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | East Detroit |
| Est. Birth Year | ~1929 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Simpson | Daughter | — | 11 | ~1929 |
| Madeline Simpson | Daughter | — | 19 | ~1921 |
| Noreen Simpson | Daughter | — | 7 | ~1933 |
| Jacqueline Simpson | Daughter | — | 5 | ~1935 |
| Peter Simpson | Head | — | 42 | ~1898 |
| Joseph Simpson | Son | — | 10 | ~1930 |
| Robert Simpson | Son | — | 14 | ~1926 |
| Russell Simpson | Son | — | 3 | ~1937 |
| Gerald Simpson | Son | — | 9 | ~1931 |
| Vincentine Simpson | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Macomb, Michigan
Daughter, age 2
Macomb, Michigan · implied b. ~1928 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Marilyn |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Canada Eng |
| Mother's Birthplace | Canada Eng |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Macomb-County, Michigan
Daughter, age 11
Macomb-County, Michigan · implied b. ~1929 — 10 household members
| Surname | Simpson |
| Given Name | Mary Alice |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Clawson |
| 1935 Residence (County) | Oakland |
| Highest Grade | No 6 |
| 1935 Residence | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Simpson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Simpson
Daughter · 1940 · age 11 · b. ~1929 · Michigan
★ You are viewing this record
Sibling
Madeline Simpson
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Noreen Simpson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Russell Simpson
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Simpson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jacqueline Simpson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Simpson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Simpson
Sibling · 1940 · age 10
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 — Macomb-County, Michigan
Open full size
1940 US Federal Census — Macomb-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01782-00519)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Lopteva | 50 | Wife | — | Michigan |
| 42 | Charles Tomlinson | 28 | Head | Time Keeper | Michigan |
| 43 | Beatrice Tomlinson | 21 | Wife | — | Michigan |
| 44 | Robert Walthoff | 42 | Head | Merchant | Michigan |
| 45 | Edna M. Walthoff | 42 | Wife | — | Michigan |
| 46 | Betty Walthoff | 16 | Daughter | — | Michigan |
| 47 | Robert Walthoff | 14 | Son | — | Michigan |
| 48 | Victor Walthoff | 10 | Son | — | Michigan |
| 49 | Mary Butler | 74 | Mother-in-law | — | Michigan |
| 50 | Edward Graebert | 55 | Head | — | Michigan |
| 51 | Beatrice Graebert | 43 | Wife | — | Michigan |
| 52 | Clayton Graebert | 21 | Son | — | Michigan |
| 53 | Robert Graebert | 20 | Son | — | Michigan |
| 54 | Elliott Graebert | 13 | Son | — | Michigan |
| 55 | Clara Nichols | 35 | Head | — | Michigan |
| 56 | Donald Nichols | 11 | Son | — | Michigan |
| 57 | Winifred Woodburn | 22 | Lodger | Waitress | Massachusetts |
| 58 | Frank Vogelman | 39 | Head | Labor | Austria |
| 59 | Anna Vogelman | 37 | Wife | — | Austria-Hungary |
| 60 | Frank Vogelman | 15 | Son | — | Michigan |
| 61 | John Vogelman | 12 | Son | — | Michigan |
| 62 | Joseph Vogelman | 10 | Son | — | Michigan |
| 63 | Peter Simpson | 42 | Head | Mechanic | Tennessee |
| 64 | Vincentine Simpson | 42 | Wife | — | Ohio |
| 65 | Madeline Simpson | 19 | Daughter | — | Michigan |
| 66 | Robert Simpson | 14 | Son | — | Michigan |
| 67 | Mary Alice Simpson THIS PERSON | 11 | Daughter | — | Michigan |
| 68 | Joseph Simpson | 10 | Son | — | Michigan |
| 69 | Gerald Simpson | 9 | Son | — | Michigan |
| 70 | Noreen Simpson | 7 | Daughter | — | Michigan |
| 71 | Jacqueline Simpson | 5 | Daughter | — | Michigan |
| 72 | Russell Simpson | 3 | Son | — | Michigan |
| 73 | Walter Davis | 37 | Head | Fire Builder | Georgia |
| 74 | Leona Davis | 37 | Wife | — | Minnesota |
| 75 | Walter Davis | 11 | Son | — | Michigan |
| 76 | Farol Davis | 10 | Daughter | — | Michigan |
| 77 | Julia Warren | 57 | Mother | — | Minnesota |
| 78 | Edward Young | 22 | Head | Trimmer | Michigan |
| 79 | Elaine Young | 20 | Wife | — | Michigan |
| 80 | Mathew Goldsmith | 65 | Head | Cabinet Maker | Hungary |
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)