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 Frank & Frank — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
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 | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Underwriter |
| Industry | Auto - Fire Insurance Agency |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1080 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same home |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Underwriter |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1918 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Frances Sullivan | Daughter | — | 20 | ~1920 |
| Margaret Sullivan | Daughter | — | 24 | ~1916 |
| Frank Sullivan | Head | — | 66 | ~1874 |
| Joseph Sullivan | Son | — | 29 | ~1911 |
| Robert Sullivan | Son | — | 22 | ~1918 |
| Kathryn Sullivan | Spouse | — | 59 | ~1881 |
Census Appearances
1920
Cook, Illinois
Son, age 2
Cook, Illinois · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Illinois |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1918 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 6 household members
| Surname | Sullivan |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Underwriter |
| Industry | Auto - Fire Insurance Agency |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1080 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same home |
| 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 Frank Sullivan (~0.92 confidence) and father Frank Sullivan (~0.92 confidence) and mother Kathryn Sullivan (~0.92 confidence) and mother Katherine Sullivan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Sullivan
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Frank Sullivan
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Kathryn Sullivan
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Katherine Sullivan
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Sullivan
Son · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Frances Sullivan
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Sullivan
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Sullivan
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
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-t0627-00978-00387)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Lydon | 30 | Wife | — | Irish Free State |
| 42 | Paul Rausch | 38 | Head | Supervisor | Nebraska |
| 43 | Ella Rausch | 38 | Wife | — | Illinois |
| 44 | La Verne Rausch | 15 | Daughter | — | Illinois |
| 45 | Kenneth Rausch | 8 | Son | — | Illinois |
| 46 | George Eggertsen | 37 | Head | Carpenter | Illinois |
| 47 | Lydia Eggertsen | 36 | Wife | — | Iowa |
| 48 | Dolores Eggertsen | 13 | Daughter | — | Illinois |
| 49 | George Baratta | 44 | Head | Clerical - Court | Italy |
| 50 | Josephine Baratta | 36 | Wife | Stitcher | Illinois |
| 51 | Sarah Baratta | 16 | Daughter | — | Illinois |
| 52 | J. Howard Culverwell | 27 | Head | Tunnel Worker | Illinois |
| 53 | Freda Culverwell | 26 | Wife | — | Illinois |
| 54 | Howard Culverwell | 6 | Son | — | Illinois |
| 55 | Betty Jane Culverwell | 0 | Daughter | — | Illinois |
| 56 | Edgar Klock | 55 | Head | Material Clerk | Illinois |
| 57 | Ella Klock | 47 | Wife | — | Illinois |
| 58 | Margaret Klock | 10 | Daughter | — | Illinois |
| 59 | Bridget O'Connell | 63 | Head | — | Irish Free State |
| 60 | Nora Caffey | 53 | Sister | Dressmaker | Irish Free State |
| 61 | Frank Sullivan | 66 | Head | Watchman | Wisconsin |
| 62 | Kathryn Sullivan | 59 | Wife | — | Illinois |
| 63 | Joseph Sullivan | 29 | Son | Clerk - Office | Illinois |
| 64 | Margaret Sullivan | 24 | Daughter | Clerk | Illinois |
| 65 | Robert Sullivan THIS PERSON | 22 | Son | Underwriter | Illinois |
| 66 | Frances Sullivan | 20 | Daughter | Telephone Oper. | Illinois |
| 67 | Michael Macdermott | 65 | Head | — | Illinois |
| 68 | Maria Macdermott | 57 | Wife | — | Irish Free State |
| 69 | Charles Macdermott | 30 | Son | Trainman | Illinois |
| 70 | Agnes Macdermott | 22 | Daughter | Clerk | Illinois |
| 71 | John Konopinski | 18 | Ward | — | Illinois |
| 72 | William Healey | 9 | Ward | — | Illinois |
| 73 | Mary Healey | 13 | Ward | — | Illinois |
| 74 | James Coughlin | 61 | Head | Policeman | Irish Free State |
| 75 | Anne Coughlin | 59 | Wife | — | Irish Free State |
| 76 | Daniel Coughlin | 32 | Son | Salesman | Illinois |
| 77 | Thomas Coughlin | 21 | Son | Clerk - Mail | Illinois |
| 78 | Howard Adams | 36 | Head | Brakeman | Illinois |
| 79 | Elsie Adams | 37 | Wife | — | Illinois |
| 80 | Howard Adams | 17 | Son | — | Illinois |
Related Census Records
Pedigree Summary
Robert + 3 siblings
Gen 1 · 4 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)