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John Joyce — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Joyce across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1914), then head of a 7-person household.
Age 26
b. ~1914
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Joyce |
| Given Name | John J. |
| 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 | Watchman |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 1130 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Watchman |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Joyce | Son | — | 26 | ~1914 |
| John Joyce | Head | — | 47 | ~1893 |
| Thomas Joyce | Son | — | 18 | ~1922 |
| Lucille Joyce | Daughter | — | 22 | ~1918 |
| Rita Joyce | Daughter | — | 16 | ~1924 |
| William Joyce | Son | — | 13 | ~1927 |
| Sarah Joyce | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Cook, Illinois
Son, age 5
Cook, Illinois · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Joyce |
| Given Name | John |
| 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 15
Cook, Illinois · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Joyce |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| 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 — 7 household members
| Surname | Joyce |
| Given Name | John J. |
| 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 | Watchman |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 1130 |
| Highest Grade | H-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 John Joyce across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Joyce (~0.92 confidence) and father James Joyce (~0.92 confidence) and father John Joyce (~0.92 confidence) and mother Sarah Joyce (~0.92 confidence) and mother Sarah Joyce (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Joyce
b. ~1877
Source father
● Household
· direct · ~0.92
Father
James Joyce
b. ~1877
Source father
● Household
· direct · ~0.92
Father
John Joyce
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Sarah Joyce
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Sarah Joyce
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Joyce
Son · 1940 · age 26 · b. ~1914 · Illinois
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Sibling
William Joyce
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Joyce
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Joyce
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Joyce
Sibling · 1940 · age 18
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-t0627-00990-00792)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Felix Joyce | 38 | Head | Bookkeeper | Illinois |
| 2 | John F. Joyce | 47 | Head | Chauffeur | Illinois |
| 3 | Sarah F. Joyce | 46 | Wife | — | Illinois |
| 4 | Thomas F. Joyce | 18 | Son | Clerical | Illinois |
| 5 | William J. Joyce | 13 | Son | — | Illinois |
| 6 | Rita M. Joyce | 16 | Daughter | — | Illinois |
| 7 | John J. Joyce THIS PERSON | 26 | Son | Watchman | Illinois |
| 8 | Lucille F. Joyce | 22 | Daughter | — | Illinois |
| 9 | Lester Lipe | 46 | Head | Mechanic | N. Carolina |
| 10 | Margaret Lipe | 47 | Wife | — | Illinois |
| 11 | Marjorie Lipe | 20 | Daughter | Ironer Shirts | N. Carolina |
| 12 | Lester Jr. Lipe | 18 | Son | Testing Records | Illinois |
| 13 | Robert Lipe | 17 | Son | — | Illinois |
| 14 | Henry Lipe | 16 | Son | — | Illinois |
| 15 | Thomas Petmezas | 46 | Head | Chef | Greece |
| 16 | Sophie Petmezas | 44 | Wife | — | Poland |
| 17 | Helen Petmezas | 22 | Daughter | Clerk | Illinois |
| 18 | Martha Petmezas | 21 | Daughter | New Worker | Illinois |
| 19 | Eleanor Petmezas | 19 | Daughter | Salesperson | Illinois |
| 20 | Andrew Petmezas | 18 | Son | — | Illinois |
| 21 | Nicholas Petmezas | 17 | Son | New Worker | Illinois |
| 22 | Alfreda Petmezas | 15 | Daughter | — | Illinois |
| 23 | Thomas Petmezas | 14 | Son | — | Illinois |
| 24 | Lorraine Petmezas | 12 | Daughter | — | Illinois |
| 25 | Clarence Hellman | 35 | Head | Glass Cutter | Illinois |
| 26 | Catherine Hellman | 32 | Wife | — | Poland |
| 27 | Francis Hellman | 12 | Son | — | Illinois |
| 28 | Leonard Hellman | 10 | Son | — | Illinois |
| 29 | Dorothy Hellman | 7 | Daughter | — | Illinois |
| 30 | David Hellman | 0 | Son | — | Illinois |
| 31 | Michael Machowicz | 66 | Head | Porter | Poland |
| 32 | Annie Machowicz | 67 | Wife | — | Poland |
| 33 | Walter B. Morgan | 51 | Head | Minister | Illinois |
| 34 | Vida B. Morgan | 50 | Wife | — | Indiana |
| 35 | George Dressel | 57 | Head | Stereotyper | Illinois |
| 36 | Mildred Dressel | 54 | Wife | — | Illinois |
| 37 | George Dressel | 11 | Son | — | Illinois |
| 38 | Edward Dennis | 36 | Head | Smoker Helper | Wisconsin |
| 39 | Mae Dennis | 35 | Wife | — | Illinois |
| 40 | Margaret Dennis | 14 | Daughter | — | Illinois |
Pedigree Summary
John + 4 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)