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Mary Arnold — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Fremont-County, Colorado
Our Model Tree links this Mary Arnold across the 1910, 1920, 1930 and 1940 US Censuses in Fremont-County, Colorado (XGBoost, ~Confirmed) — first a head (b.~1858), then head of a 2-person household.
Age 82
b. ~1858
Female
Head
Born: Belgium
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Fremont-County, Colorado |
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 82 |
| Marital Status | Widowed |
| Birthplace | Belgium |
| 1935 Residence (City) | Precinct 18 |
| 1935 Residence (County) | Fremont |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | U |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same House |
| Birth Country | Belgium |
| Birthplace (normalized) | belgium |
| Occupation | U |
| Township / Ward | Precinct 18 |
| Est. Birth Year | ~1858 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Florence Arnold | Daughter | — | 53 | ~1887 |
| Mary Arnold | Head | — | 82 | ~1858 |
Census Appearances
1910
Fremont, Colorado
Spouse, age 52
Fremont, Colorado · implied b. ~1858 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Belgium |
| Years Married | 31 |
| Children Born | 7 |
| Children Living | 6 |
| Year of Immigration | 1881 |
| Father's Birthplace | Belgium |
| Mother's Birthplace | Belgium |
| Birth Country | Belgium |
| Birthplace (normalized) | belgium |
1920
Fremont, Colorado
Spouse, age 62
Fremont, Colorado · implied b. ~1858 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary A |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Belgium |
| Year of Immigration | 1881 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Belgium |
| Mother's Birthplace | Belgium |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | French |
| Birth Country | Belgium |
| Year of Naturalization | 1890 |
| Birthplace (normalized) | belgium |
1930
Fremont, Colorado
Spouse, age 73
Fremont, Colorado · implied b. ~1857 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Belgium |
| Naturalization Status | Naturalized |
| Year of Immigration | 1881 |
| Age at First Marriage | 22 |
| Father's Birthplace | Belgium |
| Mother's Birthplace | Belgium |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | French |
| Birth Country | Belgium |
| Birthplace (normalized) | belgium |
1940
Fremont-County, Colorado
Head, age 82
Fremont-County, Colorado · implied b. ~1858 — 2 household members
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 82 |
| Marital Status | Widowed |
| Birthplace | Belgium |
| 1935 Residence (City) | Precinct 18 |
| 1935 Residence (County) | Fremont |
| Naturalization Status | Naturalized |
| Occupation | U |
| Income (1939) | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same House |
| Birth Country | Belgium |
| Birthplace (normalized) | belgium |
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 Arnold across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Arnold
Head · 1940 · age 82 · b. ~1858 · 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 — Fremont-County, Colorado
Open full size
1940 US Federal Census — Fremont-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00463-00385)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rosa Di Rito | 42 | Wife | H | Italy |
| 42 | Bennie Di Rito | 17 | Son | No No No No | Colorado |
| 43 | Earl Di Rito | 15 | Son | No No No No | Colorado |
| 44 | Arthur Di Rito | 13 | Son | No No No No | Colorado |
| 45 | Evelyn Di Rito | 11 | Daughter | No No No No | Colorado |
| 46 | Richard Di Rito | 9 | Son | No No No No | Colorado |
| 47 | Della Di Rito | 7 | Daughter | No No No No | Colorado |
| 48 | Marion Di Rito | 5 | Son | No No No No | Colorado |
| 49 | Geraldine Di Rito | 3 | Daughter | No No No No | Colorado |
| 50 | Frank Perigi | 60 | Head | Miner | Italy |
| 51 | Flora Perigi | 51 | Wife | H | Italy |
| 52 | Rena Perigi | 21 | Daughter | Office Girl | Colorado |
| 53 | Dan Luna | 43 | Head | Miner | Italy |
| 54 | Mary Luna | 37 | Wife | H | Colorado |
| 55 | Eugene Luna | 13 | Son | No No No No | Colorado |
| 56 | Dan Jr. Luna | 10 | Son | No No No No | Colorado |
| 57 | Johnnie Luna | 7 | Son | No No No No | Colorado |
| 58 | Irene Luna | 1 | Daughter | No No No No | Colorado |
| 59 | Emil Frank | 49 | Head | Farming | Colorado |
| 60 | Lucille Frank | 38 | Wife | H | Illinois |
| 61 | Marjorie Frank | 11 | Daughter | No No No No | Colorado |
| 62 | Maurine Frank | 10 | Daughter | No No No No | Colorado |
| 63 | Mary Arnold THIS PERSON | 82 | Head | U | Belgium |
| 64 | Florence Arnold | 53 | Daughter | H | Colorado |
| 65 | Antonio Di Marino | 45 | Head | Machinist | Italy |
| 66 | Maria Di Marino | 37 | Wife | H | Italy |
| 67 | Alex Odien | 28 | Head | Laborer | Michigan |
| 68 | Corine Odien | 24 | Wife | H | Kansas |
| 69 | Rosemary Odien | 4 | Daughter | No No No No | Colorado |
| 70 | Joe Odien | 2 | Son | No No No No | Colorado |
| 71 | Grace Burdick | 53 | Mother | H | Michigan |
| 72 | Madena Buffum | 17 | Niece | New Worker | Kansas |
| 73 | — | None | — | — | — |
| 74 | Antoni Gessa | 62 | Head | Farming | Italy |
| 75 | Marco Danni | 26 | Head | Arc Welding | Colorado |
| 76 | Damon Moneglini | 31 | Head | Farming | Colorado |
| 77 | Margaret Moneglini | 27 | Wife | H | Colorado |
| 78 | Janet Moneglini | 4 | Daughter | No No No No | Colorado |
| 79 | Dannie Moneglini | 2 | Son | No No No No | Colorado |
| 80 | Jennie Moneglini | 53 | Mother | H | Illinois |
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)