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William Larkin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Larkin across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 8-person household.
Age 19
b. ~1921
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Larkin |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Reforestation |
| Industry | Mountain Lookout |
| Class of Worker | GW |
| Hours Worked | 184 |
| Income (1939) | 180 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Reforestation |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1921 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Robert Larkin | Head | — | 48 | ~1892 |
| Howard Larkin | Son | — | 12 | ~1928 |
| Rita Larkin | Daughter | — | 18 | ~1922 |
| William Larkin | Son | — | 19 | ~1921 |
| Bernadette Larkin | Daughter | — | 6 | ~1934 |
| Frances Larkin | Spouse | — | 38 | ~1902 |
| Helen Larkin | Daughter | — | 14 | ~1926 |
| Byron Larkin | Son | — | 16 | ~1924 |
Census Appearances
1930
Cook, Illinois
Son, age 10
Cook, Illinois · implied b. ~1920 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkin |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Cook-County, Illinois
Son, age 19
Cook-County, Illinois · implied b. ~1921 — 8 household members
| Surname | Larkin |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Reforestation |
| Industry | Mountain Lookout |
| Class of Worker | GW |
| Hours Worked | 184 |
| Income (1939) | 180 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Larkin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Larkin
Son · 1940 · age 19 · b. ~1921 · Illinois
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Sibling
Helen Larkin
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernadette Larkin
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Byron Larkin
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Larkin
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Larkin
Sibling · 1940 · age 12
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
23 people indexed on this census page (nara:1940:m-t0627-00985-00607)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Puntis | 16 | Son | — | Poland |
| 2 | Eline Dronkowski | 75 | Head | — | Poland |
| 3 | Robert Gallis | 24 | Head | Fiber Shafter | Illinois |
| 4 | Mary Gallis | 58 | Mother | — | Italy |
| 5 | Ellen Gallis | 18 | Daughter | Packer | Illinois |
| 6 | Stanley Smolalski | 72 | Head | — | Poland |
| 7 | Frances Smolalski | 61 | Wife | — | Poland |
| 8 | Henry Smolalski | 21 | Son | Molder | Illinois |
| 9 | Frank Smolalski | 69 | Head | — | Poland |
| 10 | Susanne Smolalski | 52 | Wife | — | Illinois |
| 11 | Edward Smolalski | 20 | Son | Punch Cutter | Illinois |
| 12 | Robert Larkin | 48 | Head | Bartender | Illinois |
| 13 | Frances Larkin | 38 | Wife | — | Wisconsin |
| 14 | William Larkin THIS PERSON | 19 | Son | Reforestation | Minnesota |
| 15 | Rita Larkin | 18 | Daughter | Cashier | Wisconsin |
| 16 | Byron Larkin | 16 | Son | New Worker | Illinois |
| 17 | Helen Larkin | 14 | Daughter | — | Illinois |
| 18 | Howard Larkin | 12 | Son | — | Illinois |
| 19 | Bernadette Larkin | 6 | Daughter | — | Illinois |
| 20 | Carl Lund | 44 | Head | Window Washer | Norway |
| 21 | Carl Jr. Lund | 17 | Son | — | Illinois |
| 22 | Theodore Wilson | 66 | Lodger | Carpenter | Norway |
| 23 | George R. Wilson | 37 | Son | Office Clerk | Utah |
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)