JT
John Tierney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Will-County, Illinois
Our Model Tree links this John Tierney across the 1920, 1930 and 1940 US Censuses in Will-County, Illinois (XGBoost, ~Confirmed), with identified parents Mary & Mary — first a son (b.~1907), then head of a 3-person household.
Age 33
b. ~1907
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Will-County, Illinois |
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet |
| 1935 Residence (County) | Will |
| Additional Details | |
| Occupation | Gauger |
| Industry | Oil Refinery |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 318 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Gauger |
| Township / Ward | Joliet |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Raymond Tierney | Son | — | 23 | ~1917 |
| John Tierney | Son | — | 33 | ~1907 |
| Mary Tierney | Head | — | 56 | ~1884 |
Census Appearances
1920
Will, Illinois
Son, age 13
Will, Illinois · implied b. ~1907 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Will, Illinois
Son, age 23
Will, Illinois · implied b. ~1907 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Mechanic |
| Industry | Garage |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Will-County, Illinois
Son, age 33
Will-County, Illinois · implied b. ~1907 — 3 household members
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet |
| 1935 Residence (County) | Will |
| Occupation | Gauger |
| Industry | Oil Refinery |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 318 |
| 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 John Tierney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Tierney (~0.92 confidence) and mother Mary Tierney (~0.92 confidence) and father Mary Tierney (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Tierney
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Mary Tierney
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Mary Tierney
b. ~1885
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Tierney
Son · 1940 · age 33 · b. ~1907 · Illinois
★ You are viewing this record
Sibling
Raymond Tierney
Sibling · 1940 · age 23
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 — Will-County, Illinois
Open full size
1940 US Federal Census — Will-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00908-00021)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James Crotty | 5 | Son | — | Illinois |
| 42 | Laura Doyle | 65 | Mother | — | Iowa |
| 43 | Maurice Berlisky | 25 | Head | Junk Dealer | Nebraska |
| 44 | Shirley Berlisky | 26 | Wife | — | Illinois |
| 45 | Judith Berlisky | 1 | Daughter | — | Illinois |
| 46 | Marion Riggs | 70 | Head | — | Illinois |
| 47 | Anna Riggs | 69 | Wife | — | Illinois |
| 48 | Edward Weber | 47 | Head | — | Illinois |
| 49 | Rachel Weber | 47 | Wife | Stationary Engineer | Illinois |
| 50 | Daryl Weber | 16 | Son | — | Illinois |
| 51 | Ruby Weber | 9 | Daughter | — | Illinois |
| 52 | Harry Thomas | 31 | Head | Motorcycle Patrolman | Indiana |
| 53 | Dorothy Thomas | 34 | Wife | — | Kentucky |
| 54 | Glenn Hear | 29 | Head | Truck Driver | Illinois |
| 55 | Louise Hear | 27 | Wife | — | Illinois |
| 56 | Elwood Hear | 5 | Nephew | — | Illinois |
| 57 | Virginia Woodin | 14 | Sister in law | — | Illinois |
| 58 | Adolf Lang | 57 | Head | — | Germany |
| 59 | Alice Lang | 50 | Wife | — | Illinois |
| 60 | Evelyn Lang | 22 | Daughter | — | Illinois |
| 61 | Charlotte Lang | 9 | Daughter | — | Illinois |
| 62 | Louis Lang | 5 | Son | — | Illinois |
| 63 | Anthony Roesel | 47 | Head | Machine Operator | Maryland |
| 64 | Anna Roesel | 45 | Wife | — | Illinois |
| 65 | Lawrence Roesel | 25 | Son | Mender | Illinois |
| 66 | Francis Roesel | 17 | Son | New Worker | Illinois |
| 67 | Adeline Roesel | 14 | Daughter | — | Illinois |
| 68 | Ervin Roesel | 12 | Son | — | Illinois |
| 69 | Harold Roesel | 8 | Son | — | Illinois |
| 70 | Mary Tierney | 56 | Head | — | Illinois |
| 71 | John Tierney THIS PERSON | 33 | Son | Gauger | Illinois |
| 72 | Raymond Tierney | 23 | Son | Clerk | Illinois |
| 73 | Ervin Hobby | 46 | Head | Painter Foreman | Illinois |
| 74 | Mary Hobby | 45 | Wife | — | Illinois |
| 75 | George Hobby | 22 | Son | Laborer | Illinois |
| 76 | Edward Hobby | 17 | Son | — | Illinois |
| 77 | Mary Behrens | 68 | Aunt | — | Illinois |
| 78 | Harriet White | 49 | Head | — | Illinois |
| 79 | Mary K. White | 27 | Daughter | Bookkeeper | Illinois |
| 80 | Winifred White | 26 | Daughter | Waitress | Illinois |
Pedigree Summary
John + 1 sibling
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)