RS
Robert Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Sullivan across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents James & David — first a son (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Sullivan |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO city |
| 1935 Residence (County) | COOK |
| Additional Details | |
| Occupation | Laborer |
| Industry | Can Manfg. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1913 |
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 |
|---|---|---|---|---|
| David Sullivan | Head | — | 54 | ~1886 |
| Robert Sullivan | Son | — | 27 | ~1913 |
| Margaret Sullivan | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Cook, Illinois
Son, age 6
Cook, Illinois · implied b. ~1914 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 16
Cook, Illinois · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Robert |
| 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 27
Cook-County, Illinois · implied b. ~1913 — 3 household members
| Surname | Sullivan |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | CHICAGO city |
| 1935 Residence (County) | COOK |
| Occupation | Laborer |
| Industry | Can Manfg. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Sullivan (~0.92 confidence) and father David Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Margaret Sullivan (~0.92 confidence) and father Elmer Sullivan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Sullivan
b. ~1877
Source father
● Household
· direct · ~0.92
Father
David Sullivan
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Margaret Sullivan
b. ~1888
Source mother
● Household
· direct · ~0.92
Father
Elmer Sullivan
b. ~1890
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert Sullivan
Son · 1940 · age 27 · b. ~1913 · 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
39 people indexed on this census page (nara:1940:m-t0627-00952-00399)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Lodato | 31 | Head | Chauffeur | Illinois |
| 42 | Anna Lodato | 25 | Wife | — | Illinois |
| 43 | Ralph Lodato | 0 | Son | — | Illinois |
| 44 | Arthur Lennstrom | 47 | Head | Accountant | Illinois |
| 45 | Elanda Lennstrom | 43 | Wife | — | Illinois |
| 46 | Ruth Lennstrom | 14 | Daughter | — | Illinois |
| 47 | Alice Lennstrom | 13 | Daughter | — | Illinois |
| 48 | Frank Leonstrum | 45 | Head | Salesman | Mississippi |
| 49 | Olive Leonstrum | 40 | Wife | — | New York |
| 50 | Muriel Leonstrum | 15 | Daughter | — | Illinois |
| 51 | James Fuller | 44 | Head | Steamfitter | Illinois |
| 52 | Ellen Fuller | 45 | Wife | — | Illinois |
| 53 | Virginia Fuller | 17 | Daughter | — | Illinois |
| 54 | Eileen Fuller | 11 | Daughter | — | Illinois |
| 55 | Rudolph Korink | 40 | Head | Packer | Czecho-Slovakia |
| 56 | Hermine Korink | 29 | Wife | Engineer Cust. | Austria |
| 57 | Doris Korink | 7 | Daughter | — | Illinois |
| 58 | Ruth Korink | 5 | Daughter | — | Illinois |
| 59 | Louise Thiele | 74 | Head | — | Germany |
| 60 | Charles Barbosky | 42 | Son-Law | Salesman | Poland |
| 61 | Lillian Barbosky | 41 | Daughter | — | Illinois |
| 62 | David Sullivan | 54 | Head | Clerk | Wisconsin |
| 63 | Margaret Sullivan | 52 | Wife | — | New York |
| 64 | Robert Sullivan THIS PERSON | 27 | Son | Laborer | Illinois |
| 65 | Walter Jackowjec | 44 | Head | Auto Mechanic | Poland |
| 66 | Valdyia Jackowjec | 37 | Wife | — | Poland |
| 67 | Josephine Jackowjec | 18 | Daughter | — | Michigan |
| 68 | Walter Jackowjec | 12 | Son | — | Illinois |
| 69 | Henry Frescura | 51 | Head | Marble Setter | Italy |
| 70 | Pauline Frescura | 43 | Wife | — | Italy |
| 71 | Henry Frescura | 25 | Son | Marble Helper | Illinois |
| 72 | Mateilda Frescura | 21 | Daughter | Stenographer | Illinois |
| 73 | John Robertson | 61 | Head | Foreman-Glue | Scotland |
| 74 | Janet Robertson | 65 | Wife | — | Scotland |
| 75 | Andrew J. Eger | 43 | Head | Com. Sign Writer | Illinois |
| 76 | Nora Eger | 43 | Wife | — | Illinois |
| 77 | Geraldine Eger | 15 | Daughter | — | Illinois |
| 78 | Patricia Eger | 13 | Daughter | — | Illinois |
| 79 | Andrew Eger | 79 | Father | — | Germany |
Pedigree Summary
Robert
Gen 1 · 5 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)