MG
Mary Gross — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this Mary Gross across the 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 12-person household.
Age 18
b. ~1922
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Gross |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Valley Park City |
| 1935 Residence (County) | St. Louis |
| Additional Details | |
| Occupation | House work |
| Industry | Private homes |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 156 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | House Work |
| Township / Ward | Valley Park City |
| Est. Birth Year | ~1922 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Gene Gross | Son | — | 6 | ~1934 |
| Irene Gross | Daughter | — | 14 | ~1926 |
| Edna Gross | Daughter | — | 8 | ~1932 |
| Thomas Gross | Head | — | 54 | ~1886 |
| Freddie Gross | Son | — | 10 | ~1930 |
| Betty Gross | Daughter | — | 3 | ~1937 |
| Mary Gross | Daughter | — | 18 | ~1922 |
| James Gross | Son | — | 16 | ~1924 |
| Marilyn Gross | Daughter | — | ~1940 | |
| Robert Gross | Son | — | 4 | ~1936 |
| Mae Gross | Spouse | — | 43 | ~1897 |
| Richard Gross | Son | — | 12 | ~1928 |
Census Appearances
1930
St Louis, …
Daughter, age 7
St Louis, Missouri · implied b. ~1923 — 16 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gross |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Missouri |
| Age at First Marriage | W |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-County, Missouri
Daughter, age 18
St.-Louis-County, Missouri · implied b. ~1922 — 12 household members
| Surname | Gross |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Valley Park City |
| 1935 Residence (County) | St. Louis |
| Occupation | House work |
| Industry | Private homes |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 156 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Gross across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Gross
Daughter · 1940 · age 18 · b. ~1922 · Missouri
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Sibling
Robert Gross
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Gross
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Gross
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Gross
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gene Gross
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marilyn Gross
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Gross
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Gross
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Freddie Gross
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 — St.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02147-00447)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Opal Johnson | 13 | Daughter | — | Missouri |
| 42 | Grover Jr Johnson | 11 | Son | — | Missouri |
| 43 | Dorothy Wallis | 16 | Daughter | — | Missouri |
| 44 | R. Carrie Wideman | 35 | Mother-in-law | — | Missouri |
| 45 | John Rolen | 38 | Head | Unskilled Labor | Missouri |
| 46 | Helen Rolen | 31 | Wife | — | Missouri |
| 47 | Mary Ann Rolen | 4 | Daughter | — | Missouri |
| 48 | Fred Rolen | 2 | Son | — | Missouri |
| 49 | Edward Rue | 59 | Head | Unskilled Labor | Missouri |
| 50 | Stella Rue | 45 | Wife | — | Missouri |
| 51 | Gilbert Rue | 9 | Son | — | Missouri |
| 52 | Thomas Gross | 54 | Head | Watchman | Illinois |
| 53 | Mae Gross | 43 | Wife | — | Missouri |
| 54 | Mary Gross THIS PERSON | 18 | Daughter | House Work | Missouri |
| 55 | James Gross | 16 | Son | New Worker | Missouri |
| 56 | Irene Gross | 14 | Daughter | — | Missouri |
| 57 | Richard Gross | 12 | Son | — | Missouri |
| 58 | Freddie Gross | 10 | Son | — | Missouri |
| 59 | Edna Mae Gross | 8 | Daughter | — | Missouri |
| 60 | Gene R. Gross | 6 | Son | — | Missouri |
| 61 | Robert Lee Gross | 4 | Son | — | Missouri |
| 62 | Betty Lou Gross | 3 | Daughter | — | Missouri |
| 63 | Marilyn J. Gross | 0 | Daughter | — | Missouri |
| 64 | Dewey Jones | 42 | Head | Unskilled Labor | Missouri |
| 65 | Mary Jones | 30 | Wife | — | Missouri |
| 66 | Albert Jones | 10 | Son | — | Missouri |
| 67 | Helen Jones | 8 | Daughter | — | Missouri |
| 68 | Deloris Jones | 7 | Daughter | — | Missouri |
| 69 | Owen Carl Jones | 3 | Son | — | Missouri |
| 70 | Frank Jones | 2 | Son | — | Missouri |
| 71 | Theodore Jones | 1 | Son | — | Missouri |
| 72 | Joe Copeland | 64 | Head | Carpenter | Missouri |
| 73 | Isabel Copeland | 52 | Wife | — | Missouri |
| 74 | Kenneth A. Copeland | 16 | Son | — | Missouri |
| 75 | Elmer Schultz | 29 | Head | Common Laborer | Missouri |
| 76 | Eleanor Schultz | 20 | Wife | Wrapper | Missouri |
| 77 | Albert Jones | 34 | Head | Welder | Missouri |
| 78 | Rosella Jones | 25 | Wife | — | Missouri |
| 79 | Veva Jones | 3 | Daughter | — | Missouri |
| 80 | Robert Niehaus | 31 | Head | Common Laborer | Missouri |
Related Census Records
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)