MS
Mary Simon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Weld-County, Colorado
Our Model Tree links this Mary Simon across the 1920, 1930 and 1940 US Censuses in Weld-County, Colorado (XGBoost, ~Confirmed) — first a spouse (b.~1904), then head of a 4-person household.
Age 36
b. ~1904
Female
Spouse
Born: Russia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Weld-County, Colorado |
| Surname | Simon |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Prec #47 Severance |
| 1935 Residence (County) | Weld |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Colorado |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
| Township / Ward | Prec 47 Severance |
| Est. Birth Year | ~1904 |
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 |
|---|---|---|---|---|
| Mary Simon | Spouse | — | 36 | ~1904 |
| Pete Simon | Head | — | 39 | ~1901 |
| Helmuth Simon | Son | — | 14 | ~1926 |
| Elsie Simon | Daughter | — | 13 | ~1927 |
Census Appearances
1920
Weld, Colorado
Other, age 15
Weld, Colorado · implied b. ~1905 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simon |
| Given Name | Mary |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Russia |
| Year of Immigration | 1914 |
| Naturalization Status | Alien |
| Father's Birthplace | Russia |
| Mother's Birthplace | Russia |
| Occupation | School |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth Country | Russia |
| Birthplace (normalized) | russia |
1930
Weld, Colorado
Other, age 26
Weld, Colorado · implied b. ~1904 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simon |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Russia |
| Naturalization Status | Alien |
| 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
Weld-County, Colorado
Spouse, age 36
Weld-County, Colorado · implied b. ~1904 — 4 household members
| Surname | Simon |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Russia |
| 1935 Residence (City) | Prec #47 Severance |
| 1935 Residence (County) | Weld |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Colorado |
| 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 Simon 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 Simon
Spouse · 1940 · age 36 · b. ~1904 · 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 — Weld-County, Colorado
Open full size
1940 US Federal Census — Weld-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00482-00404)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Carl Miller | 13 | Son | — | Colorado |
| 42 | Pete Simon | 39 | Head | Farmer | Russia |
| 43 | Mary Simon THIS PERSON | 36 | Wife | — | Russia |
| 44 | Helmuth G. Simon | 14 | Son | — | Colorado |
| 45 | Elsie J. Simon | 13 | Daughter | — | Colorado |
| 46 | Henry Fritzler | 61 | Head | Farmer | Russia |
| 47 | Mollie Fritzler | 54 | Wife | — | Russia |
| 48 | Mary Fritzler | 23 | Daughter | — | Colorado |
| 49 | Ester Fritzler | 18 | Daughter | — | Colorado |
| 50 | Eleanor Fritzler | 15 | Daughter | — | Colorado |
| 51 | Edward Fritzler | 14 | Son | — | Colorado |
| 52 | Alvin Schuerman | 27 | Lodger | Farm Laborer | Kansas |
| 53 | Carl L. Carreras | 38 | Head | Farm Laborer | New Mexico |
| 54 | Aurelia Carreras | 28 | Wife | — | Kansas |
| 55 | Carl Jr. Carreras | 9 | Son | — | Colorado |
| 56 | Ray Carreras | 8 | Son | — | Colorado |
| 57 | Patsy Carreras | 6 | Daughter | — | Colorado |
| 58 | Manuel A. Carreras | 5 | Son | — | Colorado |
| 59 | Pete L. Carreras | 32 | Head | Farm Laborer | New Mexico |
| 60 | Lucy M. Carreras | 31 | Wife | — | New Mexico |
| 61 | Johnie Carreras | 3 | Son | — | Colorado |
| 62 | Mary L. Carreras | 0 | Daughter | — | Colorado |
| 63 | Carl F. Fritzler | 40 | Head | Farmer | Russia |
| 64 | Mollie Fritzler | 40 | Wife | — | Russia |
| 65 | Mable L. Fritzler | 18 | Daughter | — | Colorado |
| 66 | Alfred C. Fritzler | 13 | Son | — | Colorado |
| 67 | Elvina M. Fritzler | 10 | Daughter | — | Colorado |
| 68 | Edward Wrighton | 53 | Head | Farmer | Nebraska |
| 69 | Emma M. Wrighton | 52 | Wife | — | Russia |
| 70 | Reuben J. Wrighton | 28 | Son | Farm Laborer | Colorado |
| 71 | Fred Winder | 54 | Head | Farmer | Russia |
| 72 | Rose M. Winder | 27 | Daughter | — | Colorado |
| 73 | Robert Winder | 25 | Son | Farm Laborer | Colorado |
| 74 | Walter Winder | 20 | Son | Farm Laborer | Colorado |
| 75 | Lydia M. Winder | 15 | Daughter | — | Colorado |
| 76 | Aileen Winder | 11 | Daughter | — | Colorado |
| 77 | Helen D. Winder | 19 | Daughter | — | Nebraska |
| 78 | Henry Honstein | 32 | Head | Farmer | Colorado |
| 79 | Katherine Honstein | 25 | Wife | — | Colorado |
| 80 | Phillip Haas | 26 | Head | Farm Laborer | 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)