MG
Mary Gross — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this Mary Gross across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed) — first a spouse (b.~1886), then head of a 4-person household.
Age 54
b. ~1886
Female
Spouse
Born: Russia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Gross |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | City & County of Denver |
| 1935 Residence (County) | Denver |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
| Township / Ward | City County Of Denver |
| Est. Birth Year | ~1886 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| August Gross | Head | — | 55 | ~1885 |
| John Gross | Son | — | 16 | ~1924 |
| Mary Gross | Spouse | — | 54 | ~1886 |
| Gilbert Gross | Son | — | 9 | ~1931 |
Census Appearances
1920
Denver, Colorado
Spouse, age 36
Denver, Colorado · implied b. ~1884 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gross |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Russia |
| Year of Immigration | 1908 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Slovak |
| Birth Country | Russia |
| Year of Naturalization | 1917 |
| Birthplace (normalized) | russia |
1930
Denver, Colorado
Other, age 44
Denver, Colorado · implied b. ~1886 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grosz |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Russia |
| Naturalization Status | Naturalized |
| Year of Immigration | 1907 |
| Age at First Marriage | 21 |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1940
Denver-County, Colorado
Spouse, age 54
Denver-County, Colorado · implied b. ~1886 — 4 household members
| Surname | Gross |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | City & County of Denver |
| 1935 Residence (County) | Denver |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Gross
Spouse · 1940 · age 54 · b. ~1886 · Colorado
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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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00493-00021)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Hazel Ostermiller | 17 | Son | — | Colo |
| 2 | Jacob Tribelhorn | 60 | Head | Carpenter | Russia |
| 3 | Marie Tribelhorn | 55 | Wife | — | Russia |
| 4 | Dave Wagner | 27 | Son-law | Laborer | Nebr. |
| 5 | Catherine Wagner | 26 | Daughter | — | Colo |
| 6 | Richard Wagner | 6 | Nephew | — | Colo |
| 7 | Jenny Washer | 18 | Niece | — | Colo |
| 8 | S. Kauffman | 71 | Head | — | Russia |
| 9 | August Gross | 55 | Head | Laborer | Russia |
| 10 | Mary Gross THIS PERSON | 54 | Wife | — | Russia |
| 11 | John Gross | 16 | Son | — | Colo |
| 12 | Gilbert Gross | 9 | Son | — | Colo |
| 13 | Fred Thaut | 38 | Head | Novelty Worker | Russia |
| 14 | Freda Thaut | 36 | Wife | — | Nebr. |
| 15 | Arleen Thaut | 15 | Daughter | — | Nebr. |
| 16 | Dolores Thaut | 11 | Daughter | — | Nebr. |
| 17 | Carol Thaut | 4 | Daughter | — | Nebr. |
| 18 | John Lauch | 50 | Head | Oiler | Russia |
| 19 | Emma Lauch | 49 | Wife | — | Russia |
| 20 | Amelia Lauch | 22 | Daughter | Stenographer | Colo |
| 21 | Florence Lauch | 16 | Daughter | — | Colo |
| 22 | Edward Hisler | 26 | Head | Salesman | Colo |
| 23 | Lea Hisler | 24 | Wife | — | Colo |
| 24 | Kathleen Hisler | 5 | Daughter | — | Colo |
| 25 | William Tymkovick | 42 | Head | Butcher | Poland |
| 26 | Sophie Tymkovick | 40 | Wife | — | Poland |
| 27 | Steve Tymkovick | 14 | Son | — | Colo |
| 28 | Stella Tymkovick | 11 | Daughter | — | Colo |
| 29 | Edward Tymkovick | 2 | Son | — | Colo |
| 30 | Adam Grandt | 68 | Head | — | Russia |
| 31 | Anna Grandt | 65 | Wife | — | Russia |
| 32 | Catherine Lenhart | 32 | Head | — | Colo |
| 33 | Ruth Lenhart | 11 | Daughter | — | Colo |
| 34 | Joan Lenhart | 8 | Daughter | — | Colo |
| 35 | Jacob Luff | 65 | Head | — | Russia |
| 36 | Mollie Luff | 61 | Wife | — | Russia |
| 37 | Virginia Schaffer | 18 | G-daughter | Laborer | Colo |
| 38 | George Fischer | 38 | Head | Laborer | Russia |
| 39 | Rose Fischer | 38 | Wife | — | Russia |
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)