RD
Robert Day — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Day across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a son (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Day |
| Given Name | Robert F. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Laborer |
| Industry | Candy Mfg |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 988 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1914 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Day | Son | — | 26 | ~1914 |
| Robert Day | Head | — | 50 | ~1890 |
| Eleanor Day | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Cook, Illinois
Son, age 5
Cook, Illinois · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 16
Cook, Illinois · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Robert J Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 26
Cook-County, Illinois · implied b. ~1914 — 3 household members
| Surname | Day |
| Given Name | Robert F. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Laborer |
| Industry | Candy Mfg |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 988 |
| Highest Grade | Hs 4 |
| 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. Identified parents: father Robert Day (~0.92 confidence) and father Robert Day (~0.92 confidence) and mother Eleanor Day (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Day
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Robert Day
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Eleanor Day
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Day
Son · 1940 · age 26 · b. ~1914 · Illinois
★ You are viewing this record
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-t0627-00982-00007)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Julia Pratt | 43 | Head | — | Illinois |
| 42 | Alice Pratt | 21 | Son | Office Work | Illinois |
| 43 | Mary Pratt | 18 | Daughter | Mail-Tally | Illinois |
| 44 | Katherine Pratt | 17 | Daughter | Steno-Typing | Illinois |
| 45 | Steve Rohde | 69 | Head | Laborer | Illinois |
| 46 | Carrie Rohde | 61 | Wife | — | New York |
| 47 | John Rohde | 34 | Son | Laborer | Illinois |
| 48 | Henry Rohde | 25 | Son | Machinist | Illinois |
| 49 | Benjamin F. Fitzgerald | 42 | Head | Electrician | Illinois |
| 50 | Mary E. Fitzgerald | 40 | Wife | — | Illinois |
| 51 | Walter J. Fitzgerald | 14 | Son | — | Illinois |
| 52 | Caroline E. Graves | 62 | Sister-in-law | Forelady | Illinois |
| 53 | Georgia Wilcox | 75 | Lodger | Supervisor | Iowa |
| 54 | Wm J. Bruce | 75 | Head | Handyman & Janitor | Canada English |
| 55 | Stella M. Bruce | 60 | Wife | Saleswoman | Iowa |
| 56 | Minnie Albrecht | 70 | Head | — | Germany |
| 57 | Clara Albrecht | 42 | Daughter | — | Illinois |
| 58 | Roy Albrecht | 38 | Son | Saleslady | Illinois |
| 59 | James Kelly | 60 | Head | Tool Maker | Illinois |
| 60 | Amelia Kelly | 61 | Wife | Iron Molder | Illinois |
| 61 | Edward Kelly | 36 | Son | — | Illinois |
| 62 | Mary Ahern | 37 | Head | Iron Molder | Massachusetts |
| 63 | Eileen Ahern | 12 | Daughter | Filing Clerk | Illinois |
| 64 | Herbert Ahern | 10 | Daughter | — | Illinois |
| 65 | James Ahern | 46 | Head | — | Illinois |
| 66 | Catherine Ahern | 41 | Mother | Bartender | Illinois |
| 67 | Michael Ahern | 34 | Brother | Assistant | Illinois |
| 68 | Elizabeth Nolan | 57 | Head | Forelady | New York State |
| 69 | Margaret Nolan | 28 | Daughter | — | Illinois |
| 70 | Joseph Nolan | 22 | Son | Machinist | Illinois |
| 71 | Edward Nolan | 19 | Son | Laborer | Illinois |
| 72 | Angie Nolan | 12 | Sister | — | Illinois |
| 73 | Patrick C. Hutting | 74 | Head | Watchman | New York State |
| 74 | Sadie Hutting | 30 | Daughter | Asst. Clerk | Illinois |
| 75 | Helen Hutting | 27 | Daughter | Librarian | Illinois |
| 76 | William Hutting | 25 | Son | Laborer | Illinois |
| 77 | James Hutting | 23 | Son | Fireman | Illinois |
| 78 | Robert F. Day | 50 | Head | Salesman | Illinois |
| 79 | Eleanor Day | 50 | Wife | — | Illinois |
| 80 | Robert F. Jr. Day THIS PERSON | 26 | Son | Laborer | Illinois |
Pedigree Summary
Robert
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)