RC
Robert Chapman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Chapman across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Martin & Martin — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Chapman |
| Given Name | Robert H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Superintendent |
| Industry | Laundry |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 156 |
| Highest Grade | C 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Superintendent |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1917 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Andrew Chapman | Son | — | 20 | ~1920 |
| Martin Chapman | Head | — | 52 | ~1888 |
| Robert Chapman | Son | — | 23 | ~1917 |
| Herman Chapman | Son | — | 28 | ~1912 |
Census Appearances
1920
Cook, Illinois
Son, age 3
Cook, Illinois · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Holland |
| Mother's Birthplace | Holland |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 13
Cook, Illinois · implied b. ~1917 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Holland |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 23
Cook-County, Illinois · implied b. ~1917 — 4 household members
| Surname | Chapman |
| Given Name | Robert H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Superintendent |
| Industry | Laundry |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 156 |
| Highest Grade | C 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 Chapman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Martin Chapman (~0.92 confidence) and father Martin Chapman (~0.92 confidence) and mother Anna Chapman (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Martin Chapman
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Martin Chapman
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Anna Chapman
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Chapman
Son · 1940 · age 23 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
Andrew Chapman
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Herman Chapman
Sibling · 1940 · age 28
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
39 people indexed on this census page (nara:1940:m-t0627-00939-00228)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ralph G Travis | 18 | Son | Apprentice | Illinois |
| 42 | Anna Travis | 57 | Housekeeper | Housekeeper | England |
| 43 | Peter Hannema | 63 | Head | — | Netherlands |
| 44 | Rose B Hannema | 60 | Wife | — | Illinois |
| 45 | Marion Hannema | 32 | Daughter | Stenographer | Illinois |
| 46 | Ruth Hannema | 21 | Daughter | Filing | Illinois |
| 47 | John Vander Vliet | 45 | Head | Clerk | Illinois |
| 48 | Ruth Vander Vliet | 37 | Wife | — | Illinois |
| 49 | Marilyn Vander Vliet | 15 | Daughter | — | Illinois |
| 50 | William A Chapman | 38 | Head | Broker | Illinois |
| 51 | Elizabeth Chapman | 37 | Wife | — | Illinois |
| 52 | William Chapman | 10 | Son | — | Illinois |
| 53 | Tessa Richards | 42 | Sister | General Office | Illinois |
| 54 | Crow C Wilkerson | 54 | Head | Sales Manager | Indiana |
| 55 | Delia Wilkerson | 47 | Wife | — | Wisconsin |
| 56 | Laura Lee Wilkerson | 11 | Daughter | — | Illinois |
| 57 | Cornelius Melania | 57 | Head | Office Clerk | Illinois |
| 58 | Gertrude Melania | 54 | Wife | — | Illinois |
| 59 | William Thomson | 51 | Head | Purchasing Agent | Scotland |
| 60 | Florence Thomson | 39 | Wife | — | Illinois |
| 61 | William Thomson | 13 | Son | — | Illinois |
| 62 | Martin D Chapman | 52 | Head | Laundry | Netherlands |
| 63 | Herman W Chapman | 28 | Son | Superintendent | Illinois |
| 64 | Robert H Chapman THIS PERSON | 23 | Son | Superintendent | Illinois |
| 65 | Andrew W Chapman | 20 | Son | Laborer | Illinois |
| 66 | Albert C Bose | 63 | Head | Salesmanager | Illinois |
| 67 | Clara Bose | 64 | Wife | — | Netherlands |
| 68 | Bernard Van Etten | 36 | Head | Contractor | Illinois |
| 69 | Kathleen Van Etten | 37 | Wife | — | Illinois |
| 70 | Margery Van Etten | 9 | Daughter | — | Illinois |
| 71 | Kathleen Van Etten | 7 | Daughter | — | Illinois |
| 72 | Bernard Van Etten | 6 | Son | — | Illinois |
| 73 | Elaine Van Etten | 1 | Daughter | — | Illinois |
| 74 | Walter Mels | 34 | Head | Accountant | Illinois |
| 75 | Jane Mels | 30 | Wife | — | Illinois |
| 76 | Bernice Ann Mels | 5 | Daughter | — | Illinois |
| 77 | Ray Godshall | 53 | Head | Mail Clerk | Nebraska |
| 78 | Adelia Godshall | 53 | Wife | — | Illinois |
| 79 | Myrtle Godshall | 23 | Daughter | Stenographer | Illinois |
Pedigree Summary
Robert + 2 siblings
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)