TK
Thomas Kelly — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Thomas Kelly across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Hannah & Michael — first a son (b.~1908), then head of a 6-person household.
Age 32
b. ~1908
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Kelly |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Clerk |
| Industry | Insurance Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerk |
| Township / Ward | Chicago |
| Est. Birth Year | ~1908 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Mary Kelly | Daughter | — | 28 | ~1912 |
| Hannah Kelly | Head | — | 70 | ~1870 |
| Thomas Kelly | Son | — | 32 | ~1908 |
| John Kelly | Son | — | 36 | ~1904 |
| William Kelly | Son | — | 45 | ~1895 |
| Edward Kelly | Son | — | 38 | ~1902 |
Census Appearances
1920
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1909 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kelly |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Canada |
| 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
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1909 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kelly |
| Given Name | Tom |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Canada |
| Mother's Birthplace | Illinois |
| Occupation | Accountant |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 32
Cook-County, Illinois · implied b. ~1908 — 6 household members
| Surname | Kelly |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Clerk |
| Industry | Insurance Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| 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 Thomas Kelly across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Hannah Kelly (~0.92 confidence) and father Michael Kelly (~0.92 confidence) and mother Rose Kelly (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Hannah Kelly
b. ~1870
Source mother
● Household
· direct · ~0.92
Father
Michael Kelly
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Rose Kelly
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Kelly
Son · 1940 · age 32 · b. ~1908 · Illinois
★ You are viewing this record
Sibling
John Kelly
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Kelly
Sibling · 1940 · age 45
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kelly
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Kelly
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-t0627-00952-00173)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clara Nagel | 47 | Daughter | Ad Taker | Nebraska |
| 42 | Eldridge Humphrey | 65 | Head | Collector | Illinois |
| 43 | Florence Humphrey | 66 | Wife | — | New Jersey |
| 44 | Michael Blaha | 63 | Head | Janitor | Czechoslovakia |
| 45 | Josephine Blaha | 57 | Wife | — | Czechoslovakia |
| 46 | John Kocinski | 35 | Head | Barber | Illinois |
| 47 | Bernice Kocinski | 27 | Wife | — | Illinois |
| 48 | Beverly Kocinski | 4 | Daughter | — | Illinois |
| 49 | Carol A. Kocinski | 1 | Daughter | — | Illinois |
| 50 | Mattie Klatt | 25 | Lodger | Milliner | Illinois |
| 51 | Joseph Kocinski | 64 | Head | — | Poland |
| 52 | Martha Kocinski | 56 | Wife | — | Illinois |
| 53 | Clara Kocinski | 24 | Daughter | Clerk | Illinois |
| 54 | Iveline La Fascia | 47 | Head | Millwright | Illinois |
| 55 | Marian La Fascia | 44 | Wife | — | Illinois |
| 56 | Lorraine La Fascia | 17 | Daughter | — | Illinois |
| 57 | Constance La Fascia | 12 | Daughter | — | Illinois |
| 58 | Cornelius La Fascia | 4 | Son | — | Illinois |
| 59 | James R. Mitchell | 40 | Head | Police Officer | Illinois |
| 60 | Catherine Mitchell | 40 | Wife | — | Illinois |
| 61 | Marcella Mitchell | 16 | Daughter | — | Illinois |
| 62 | James J. Mitchell | 12 | Son | — | Illinois |
| 63 | Elaine Mitchell | 11 | Daughter | — | Illinois |
| 64 | Frank Lettieri | 39 | Head | Chauffeur | Illinois |
| 65 | Margaret Lettieri | 38 | Wife | — | Illinois |
| 66 | Jeanne Lettieri | 13 | Daughter | — | Illinois |
| 67 | Marietta Lettieri | 5 | Daughter | — | Illinois |
| 68 | Hannah Kelly | 70 | Head | — | Irish Free State |
| 69 | William J. Kelly | 45 | Son | Bartender | Illinois |
| 70 | Edward Kelly | 38 | Son | Clerk | Illinois |
| 71 | John Kelly | 36 | Son | — | Illinois |
| 72 | Thomas Kelly THIS PERSON | 32 | Son | Clerk | Illinois |
| 73 | Mary Kelly | 28 | Daughter | Bookkeeper | Illinois |
| 74 | Clifford Campbell | 46 | Head | Service Man | Indiana |
| 75 | Evelyn Campbell | 40 | Wife | Switchboard | Illinois |
| 76 | Raymond Campbell | 23 | Son | — | Illinois |
| 77 | Debra Campbell | 20 | Daughter | Clerk | Illinois |
| 78 | Lorraine Campbell | 17 | Daughter | Clerk | Illinois |
| 79 | Eloise Campbell | 16 | Daughter | — | Illinois |
| 80 | Frank Kratka | 68 | Head | — | Czechoslovakia |
Pedigree Summary
Thomas + 4 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)