JL
John Larkin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Larkin across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 12-person household.
Age 14
b. ~1926
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Larkin |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Class of Worker | S |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1926 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Rose Larkin | Daughter | — | 11 | ~1929 |
| Leonora Larkin | Daughter | — | 7 | ~1933 |
| Thomas Larkin | Daughter | — | 13 | ~1927 |
| John Larkin | Head | — | 44 | ~1896 |
| Bernard Mannion | Other | — | 47 | ~1893 |
| Caroline Vittucco | Other | — | 42 | ~1898 |
| Ralph Larkin | Son | — | 13 | ~1927 |
| Charles Larkin | Son | — | 9 | ~1931 |
| David Larkin | Son | — | 1 | ~1939 |
| John Larkin | Son | — | 14 | ~1926 |
| Franklin Larkin | Son | — | 5 | ~1935 |
| Rose Larkin | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Cook, Illinois
Son, age 3
Cook, Illinois · implied b. ~1927 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkin |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland-S.I. |
| Mother's Birthplace | Ireland-S.I. |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 14
Cook-County, Illinois · implied b. ~1926 — 12 household members
| Surname | Larkin |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Class of Worker | S |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 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 Larkin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Larkin
Son · 1940 · age 14 · b. ~1926 · Illinois
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Sibling
Rose Larkin
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonora Larkin
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Larkin
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Larkin
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Larkin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Franklin Larkin
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ralph Larkin
Sibling · 1940 · age 13
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
38 people indexed on this census page (nara:1940:m-t0627-00989-00782)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gustav Johnson | 71 | Head | — | Sweden |
| 42 | Louise Johnson | 64 | Wife | — | Sweden |
| 43 | Carl Gordon | 40 | Head | Proprietor | Norway |
| 44 | Ruth Gordon | 30 | Wife | Cashier | Illinois |
| 45 | George Hansen | 27 | Lodger | Operator | Illinois |
| 46 | John Larkin | 44 | Head | Order Picker | Kansas |
| 47 | Rose Larkin | 43 | Wife | — | Illinois |
| 48 | John Jr Larkin THIS PERSON | 14 | Son | — | Illinois |
| 49 | Ralph Larkin | 13 | Son | — | Illinois |
| 50 | Thomas Larkin | 13 | Daughter | — | Illinois |
| 51 | Rose Ann Larkin | 11 | Daughter | — | Illinois |
| 52 | Charles Larkin | 9 | Son | — | Illinois |
| 53 | Leonora Larkin | 7 | Daughter | — | Illinois |
| 54 | Franklin Larkin | 5 | Son | — | Illinois |
| 55 | David Larkin | 1 | Son | — | Illinois |
| 56 | Caroline Vittucco | 42 | Sister-in-law | Librarian | Illinois |
| 57 | Bernard Mannion | 47 | Lodger | Gluer | Scotland |
| 58 | Peter Andersen | 51 | Head | Janitor | Norway |
| 59 | Alfrieda Andersen | 44 | Wife | — | Norway |
| 60 | Anna Andersen | 12 | Daughter | — | Norway |
| 61 | Nathan Kaplan | 41 | Head | Trimmer | Russia |
| 62 | Sara Kaplan | 31 | Wife | — | Illinois |
| 63 | Martin Kaplan | 4 | Son | — | Illinois |
| 64 | Benjamin Pallas | 41 | Head | Owner | Russia |
| 65 | Mary Pallas | 37 | Wife | — | Russia |
| 66 | Marvin Pallas | 11 | Son | — | Illinois |
| 67 | Leroy Pallas | 6 | Son | — | Illinois |
| 68 | Gerald Pallas | 4 | Son | — | Illinois |
| 69 | Fred White | 33 | Head | Representative | England |
| 70 | Margaret White | 29 | Wife | — | Illinois |
| 71 | Louise White | 2 | Daughter | — | Illinois |
| 72 | Philip Turbov | 40 | Head | Filler Man | Russia |
| 73 | Gwen Turbov | 36 | Wife | — | Pennsylvania |
| 74 | Marshall Turbov | 11 | Son | — | Illinois |
| 75 | Sam Rosenberg | 30 | Head | Bakery Route | Illinois |
| 76 | Jennie Rosenberg | 26 | Wife | — | Missouri |
| 77 | Paul Rosenberg | 5 | Son | — | Connecticut |
| 78 | Barbara Rosenberg | 0 | Daughter | — | Illinois |
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)