WJ
William Jones — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Jones across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1907), then head of a 4-person household.
Age 33
b. ~1907
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Jones |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Inspector |
| Industry | Mfg. Steel |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 4962 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Inspector |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1907 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Ellen Jones | Daughter | — | 38 | ~1902 |
| Alice Harper | Daughter | — | 29 | ~1911 |
| William Jones | Head | — | 67 | ~1873 |
| William Jones | Son | — | 33 | ~1907 |
Census Appearances
1920
Cook, Illinois
Son, age 14
Cook, Illinois · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jonas |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| 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 24
Cook, Illinois · implied b. ~1906 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jonas |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Interney |
| Industry | Hospital |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 33
Cook-County, Illinois · implied b. ~1907 — 4 household members
| Surname | Jones |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Inspector |
| Industry | Mfg. Steel |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 4962 |
| 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 William Jones across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Jonas (~0.92 confidence) and father William Jonas (~0.92 confidence) and mother Margaret Jonas (~0.92 confidence) and mother Margaret Jonas (~0.92 confidence) and father William Jones (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Jonas
b. ~1880
Source father
● Household
· direct · ~0.92
Father
William Jonas
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Margaret Jonas
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Margaret Jonas
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
William Jones
b. ~1873
Source father
● Household
· direct · ~0.92
This person
Anchor record
William Jones
Son · 1940 · age 33 · b. ~1907 · Illinois
★ You are viewing this record
Sibling
Alice Harper
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen Jones
Sibling · 1940 · age 38
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-t0627-00934-00735)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gladys Brown | 45 | Wife | — | Illinois |
| 2 | John Portner | 61 | Head | Plumber | Scotland |
| 3 | Christina Portner | 59 | Wife | — | Scotland |
| 4 | Minnie Turpa | 59 | Head | — | Indiana |
| 5 | Wilbert Means | 34 | Son | Secretary | Colorado |
| 6 | Lillian Means | 31 | Daughter | Stenographer | Indiana |
| 7 | Fredrick Wunker | 60 | Head | Painter & Decor. | Illinois |
| 8 | Katherine Wunker | 51 | Wife | — | Illinois |
| 9 | Robert Wunker | 23 | Son | — | Illinois |
| 10 | Lucy Fisher | 74 | In law | — | Illinois |
| 11 | Mark Hogan | 41 | Head | Sales Manager | Illinois |
| 12 | Alice Hogan | 41 | Wife | — | Illinois |
| 13 | Mary Lou Hogan | 10 | Daughter | — | Illinois |
| 14 | Mark Jr. Hogan | 9 | Son | — | Illinois |
| 15 | George Ganger | 71 | Head | Messenger | Germany |
| 16 | Amelia Ganger | 71 | Wife | — | Germany |
| 17 | Elsie Ganger | 34 | Daughter | Secretary | Iowa |
| 18 | Frederick Ganger | 31 | Son | Messenger | Iowa |
| 19 | Henry Carney | 37 | Head | Salesman | Illinois |
| 20 | Anne Carney | 37 | Wife | — | Illinois |
| 21 | Patricia Carney | 7 | Daughter | — | Illinois |
| 22 | Gordon Whitt | 32 | Head | Photo Engraver | Missouri |
| 23 | Francis Whitt | 29 | Wife | — | Illinois |
| 24 | Elizabeth Lee | 53 | In law | Cashier | Canada English |
| 25 | Isadore Moscow | 49 | Head | Foreman | Russia |
| 26 | Mary Moscow | 49 | Wife | — | Russia |
| 27 | Maurice Moscow | 17 | Son | — | Illinois |
| 28 | Rosaline Moscow | 17 | Daughter | — | Illinois |
| 29 | Sam Portnoy | 51 | Head | Proprietor | Russia |
| 30 | Anna Portnoy | 51 | Wife | — | Poland |
| 31 | Laura Portnoy | 25 | Daughter | Clerk | Wisconsin |
| 32 | William Jones | 67 | Head | Clerk | England |
| 33 | Ellen Jones | 38 | Daughter | Stenographer | Illinois |
| 34 | William Jr. Jones THIS PERSON | 33 | Son | Inspector | Illinois |
| 35 | Alice Harper | 29 | Daughter | Typist | Illinois |
| 36 | Leo Klein | 40 | Head | Stagehand | Illinois |
| 37 | Lucille Klein | 36 | Wife | — | Illinois |
| 38 | Bernard Klein | 15 | Son | — | Illinois |
| 39 | Alfred Klein | 11 | Son | — | Illinois |
| 40 | John Klein | 11 | Son | — | Illinois |
Pedigree Summary
William + 2 siblings
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)