RD
Robert Day — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Peoria-County, Illinois
Our Model Tree links this Robert Day across the 1920, 1930 and 1940 US Censuses in Peoria-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1895), then head of a 8-person household.
Age 45
b. ~1895
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Peoria-County, Illinois |
| Surname | Day |
| Given Name | Robert W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Peoria Heights Village |
| 1935 Residence (County) | Peoria |
| Additional Details | |
| Occupation | Refrigeration Engineer |
| Industry | Brewery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1872 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Refrigeration Engineer |
| Township / Ward | Peoria Heights Village |
| Est. Birth Year | ~1895 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Bernard Day | Son | — | 17 | ~1923 |
| Marjorie Day | Daughter | — | 12 | ~1928 |
| Gerard Day | Son | — | 7 | ~1933 |
| Kenneth Day | Son | — | 14 | ~1926 |
| Robert Day | Head | — | 45 | ~1895 |
| Robert Day | Son | — | 19 | ~1921 |
| Dorothy Day | Daughter | — | 4 | ~1936 |
| Eva Day | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Peoria, Illinois
Head, age 25
Peoria, Illinois · implied b. ~1895 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Robert F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Machinist |
| Industry | Tractor Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Peoria, Illinois
Head, age 35
Peoria, Illinois · implied b. ~1895 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Robert W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 22 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Occupation | Machinist |
| Industry | Tractor Mfg |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4000 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Peoria-County, Illinois
Head, age 45
Peoria-County, Illinois · implied b. ~1895 — 8 household members
| Surname | Day |
| Given Name | Robert W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Peoria Heights Village |
| 1935 Residence (County) | Peoria |
| Occupation | Refrigeration Engineer |
| Industry | Brewery |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1872 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Robert Day across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Day
Head · 1940 · age 45 · b. ~1895 · 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 — Peoria-County, Illinois
Open full size
1940 US Federal Census — Peoria-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00865-00337)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Helen Fisher | 29 | Wife | — | Illinois |
| 42 | Shirley Fisher | 4 | Daughter | — | Illinois |
| 43 | Joyce Irene Fisher | 3 | Daughter | — | Illinois |
| 44 | Olin E. Davis | 27 | Head | Crane Operator | Illinois |
| 45 | Helen Davis | 26 | Wife | — | Illinois |
| 46 | Marsha Lou Davis | 2 | Daughter | — | Illinois |
| 47 | Virginius B. Chase | 64 | Head | Receiving Clerk | Illinois |
| 48 | Martin J. Crabtree | 60 | Head | Grocer | Kentucky |
| 49 | Mildred Y. Crabtree | 43 | Wife | — | Illinois |
| 50 | Giles Crabtree | 13 | Son | — | Illinois |
| 51 | Harold Crabtree | 11 | Son | — | Illinois |
| 52 | Claude E. Reed | 32 | Head | Manager | Illinois |
| 53 | Dorothy G. Reed | 30 | Wife | — | Illinois |
| 54 | Jack Reed | 4 | Son | — | Illinois |
| 55 | Robert W. Day THIS PERSON | 45 | Head | Refrigeration Engineer | Illinois |
| 56 | Eva M. Day | 46 | Wife | — | Illinois |
| 57 | Robert W. Day | 19 | Son | — | Illinois |
| 58 | Bernard A. Day | 17 | Son | — | Illinois |
| 59 | Kenneth E. Day | 14 | Son | — | Illinois |
| 60 | Marjorie L. Day | 12 | Daughter | — | Illinois |
| 61 | Gerard F. Day | 7 | Son | — | Illinois |
| 62 | Dorothy J. Day | 4 | Daughter | — | Illinois |
| 63 | Anthony Bartolomucci | 35 | Head | Bar Tender | Italy |
| 64 | Mary Bartolomucci | 25 | Wife | — | Illinois |
| 65 | Mary Louise Bartolomucci | 3 | Daughter | — | Illinois |
| 66 | Joseph F. Toesel | 37 | Head | Asst. Supt. | Czechoslovakia |
| 67 | Anna Toesel | 32 | Wife | — | Czechoslovakia |
| 68 | Otto A. Toesel | 5 | Son | — | Illinois |
| 69 | Harlan D. Hinkle | 46 | Head | Auto Mechanic | Ohio |
| 70 | Lillian Hinkle | 38 | Wife | — | Illinois |
| 71 | Harold Hinkle | 17 | Son | — | Illinois |
| 72 | Harlan Jr. Hinkle | 14 | Son | — | Illinois |
| 73 | Geo Robert Hinkle | 13 | Son | — | Illinois |
| 74 | Samuel G. Strotheide | 47 | Head | Laborer | Illinois |
| 75 | Beulah A. Strotheide | 35 | Wife | — | Illinois |
| 76 | Sarah Thrasher | 57 | Mother-in-law | — | Kentucky |
| 78 | Harry J. Rafferty | 49 | Head | Real Estate Salesman | Illinois |
| 79 | Mary E. Rafferty | 50 | Wife | — | Illinois |
| 80 | James M. B. Rafferty | 24 | Son | Salesman Auto Parts | 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)