JT
John Tierney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dupage-County, Illinois
Our Model Tree links this John Tierney across the 1930 and 1940 US Censuses in Dupage-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 8-person household.
Age 25
b. ~1915
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dupage-County, Illinois |
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Plainfield |
| 1935 Residence (County) | Will |
| Additional Details | |
| Occupation | salesman meat |
| Industry | PW |
| Class of Worker | 1400 |
| Hours Worked | 48 |
| Highest Grade | C 3 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Salesman Meat |
| Township / Ward | Glen Ellyn |
| Est. Birth Year | ~1915 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Joseph Tierney | Son | — | 32 | ~1908 |
| Frank Tierney | Spouse | — | 61 | ~1879 |
| Clarence Tierney | Head | — | 61 | ~1879 |
| Bess Tierney | Daughter | — | 34 | ~1906 |
| John Tierney | Son | — | 25 | ~1915 |
| Mary Tierney | Daughter | — | 28 | ~1912 |
| Paul Tierney | Son | — | 30 | ~1910 |
| Mary Linn | Other | — | 37 | ~1903 |
Census Appearances
1930
Cook, Illinois
Son, age 14
Cook, Illinois · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Dupage-County, Illinois
Son, age 25
Dupage-County, Illinois · implied b. ~1915 — 8 household members
| Surname | Tierney |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Plainfield |
| 1935 Residence (County) | Will |
| Occupation | salesman meat |
| Industry | PW |
| Class of Worker | 1400 |
| Hours Worked | 48 |
| Highest Grade | C 3 |
| 1935 Residence | Illinois |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Tierney
Son · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Mary Tierney
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bess Tierney
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Tierney
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Tierney
Sibling · 1940 · age 30
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 — Dupage-County, Illinois
Open full size
1940 US Federal Census — Dupage-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00798-00250)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Richard Canfield | 17 | son | — | Illinois |
| 42 | David Canfield | 16 | son | — | Illinois |
| 43 | Martha Jean Canfield | 15 | daughter | — | Illinois |
| 44 | Virginia Canfield | 13 | daughter | — | Illinois |
| 45 | Betty Ann Canfield | 12 | daughter | — | Illinois |
| 46 | Robert Canfield | 7 | son | — | Illinois |
| 47 | Caryl Canfield | 3 | daughter | — | Illinois |
| 48 | Vivian Kickert | 27 | Head | — | Illinois |
| 49 | William Kickert | 32 | Husband | Crane Eng. | Illinois |
| 50 | William Jr Kickert | 8 | son | — | Illinois |
| 51 | Raymond Kickert | 7 | son | — | Illinois |
| 52 | Jean Kickert | 5 | daughter | — | Illinois |
| 53 | Florence Ruhnke | 25 | Head | — | Illinois |
| 54 | Roger Ruhnke | 23 | Husband | Switchman | Illinois |
| 55 | Nancy Ruhnke | 5 | daughter | — | Illinois |
| 56 | Frank Loub | 68 | Father | — | Austria |
| 57 | Janet Mcmahon | 24 | Head | General Office Work | Illinois |
| 58 | Alfred Mcmahon | 27 | Husband | Decorator (Int) | Pennsylvania |
| 59 | Hattie Haas | 53 | Head | — | Illinois |
| 60 | Albert Haas | 55 | Husband | Grocery Market | Illinois |
| 61 | Ann Haas | 29 | daughter | Private Secretary | Illinois |
| 62 | Harriet Haas | 20 | daughter | — | Illinois |
| 63 | Clarence Tierney | 61 | Head | — | Illinois |
| 64 | Frank Tierney | 61 | Husband | — | Illinois |
| 65 | Bess Tierney | 34 | daughter | Teacher Pub Sch. | Illinois |
| 66 | Joseph Tierney | 32 | son | Meat & Grocery | Illinois |
| 67 | Paul Tierney | 30 | son | Clerk Post | Illinois |
| 68 | Mary Tierney | 28 | daughter | Teacher Pub. | Illinois |
| 69 | John Tierney THIS PERSON | 25 | son | Salesman Meat | Illinois |
| 70 | Mary Linn | 37 | Lodger | Teacher High Sch. | Illinois |
| 71 | Martha Conrad | None | Head | H | — |
| 72 | John M Hoskins | 89 | Father | — | Canada |
| 73 | Alice Ruhne | 21 | Lodger | Housework Priv. Homes | Iowa |
| 74 | Beverly Caten | 15 | Head | — | Illinois |
| 75 | John Caten | 11 | son | Policeman City | Kentucky |
| 76 | Myrtle Caten | 54 | wife | — | Illinois |
| 77 | Jane Caten | 14 | daughter | — | Illinois |
| 78 | Myrtle Caten | 18 | daughter | Clerk Dept. Store | Illinois |
| 79 | Edward Fisher | 75 | Head | — | England |
| 80 | Eliza Fisher | 75 | wife | — | England |
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)