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Mary Arnold — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Arnold across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1865), then head of a 3-person household.
Age 75
b. ~1865
Female
Spouse
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Arnold |
| Given Name | Mary Ann |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 75 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Illinois |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Illinois |
| Est. Birth Year | ~1865 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Arnold | Head | — | 78 | ~1862 |
| Edgar Arnold | Son | — | 40 | ~1900 |
| Mary Arnold | Spouse | — | 75 | ~1865 |
Census Appearances
1920
Cook, Illinois
Spouse, age 56
Cook, Illinois · implied b. ~1864 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary Ann |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1887 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
Cook, Illinois
Spouse, age 65
Cook, Illinois · implied b. ~1865 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1888 |
| Age at First Marriage | 33 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Cook-County, Illinois
Spouse, age 75
Cook-County, Illinois · implied b. ~1865 — 3 household members
| Surname | Arnold |
| Given Name | Mary Ann |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 75 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Illinois |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Arnold
Spouse · 1940 · age 75 · b. ~1865 · Illinois
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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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01012-00277)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edward Munsch | 46 | Brother | Laborer | Illinois |
| 42 | Henry C. Munsch | 43 | Brother | Assembler | Illinois |
| 43 | Richard Tschachinger | 46 | Lodger | Metal Worker | Germany |
| 44 | — | None | — | — | — |
| 45 | John Kalamyer | 37 | Head | Owner | Germany |
| 46 | Beverly Kalamyer | 4 | Daughter | — | Illinois |
| 47 | Raymond Kalamyer | 8 | Son | — | Illinois |
| 48 | Antonia Raeder | 58 | Mother | Housemaid | Germany |
| 49 | Edward L. Ptack | 35 | Head | Janitor | Illinois |
| 50 | Margaret L. Ptack | 33 | Wife | Stenographer | Indiana |
| 51 | John M. Arnold | 78 | Head | — | Iowa |
| 52 | Mary Ann Arnold THIS PERSON | 75 | Wife | — | England |
| 53 | Edgar D. Arnold | 40 | Son | Structural Steel | Illinois |
| 54 | Benjamin Lewinski | 51 | Head | Laborer | Wisconsin |
| 55 | Gilbert Muller | 26 | Head | Machine Op. | Illinois |
| 56 | Lucille Muller | 23 | Wife | Power Mach Op. | Illinois |
| 57 | Rudolf Ritter | 78 | Head | — | Germany |
| 58 | Frank Margis | 60 | Lodger | Coal Drivers Helper | Illinois |
| 59 | Julia Margis | 57 | Lodger | — | Austria |
| 60 | Paul Kleeck | 23 | Head | Truck Driver Chauffeur | Illinois |
| 61 | Edna Kleeck | 19 | Wife | Cutter | Illinois |
| 62 | Robert Smith | 52 | Uncle | — | New York |
| 63 | Clarence Frey | 40 | Head | Turner Lead Man | Illinois |
| 64 | Minnie Frey | 42 | Wife | — | New York |
| 65 | Dolores Frey | 12 | Daughter | Stationary Engine | Illinois |
| 66 | Marylin Frey | 7 | Daughter | — | Illinois |
| 67 | Rudolph Bruschke | 73 | Father-in-law | — | Germany |
| 68 | George D. Luntis | 54 | Head | Printer | Wisconsin |
| 69 | Hattie E. Luntis | 47 | Wife | — | Illinois |
| 70 | Lillian Luntis | 19 | Daughter | Reception Clerk | Illinois |
| 71 | Richard Stephan | 35 | Head | Cabinet Maker | Germany |
| 72 | Hattie Stephan | 25 | Wife | — | Illinois |
| 73 | Darwin Stephan | 10 | Son | — | Illinois |
| 74 | Bernhard Stephan | 8 | Son | — | Illinois |
| 75 | Dorothy Stephan | 2 | Daughter | — | Illinois |
| 76 | Fred Astrup | 70 | Head | — | Norway |
| 77 | Hildur Astrup | 64 | Wife | — | Illinois |
| 78 | Fred Astrup | 46 | Son | Salesman | Illinois |
| 79 | Mary Blake | 73 | Head | — | Illinois |
| 80 | Loretta Blake | 38 | Daughter | Operator | Illinois |
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)