LJ
Leo Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hartford-County, Connecticut
Our Model Tree links this Leo Johnson across the 1930 and 1940 US Censuses in Hartford-County, Connecticut (XGBoost, ~Confirmed) — first a son (b.~1902), then head of a 6-person household.
Age 38
b. ~1902
Male
Son
Born: Connecticut
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hartford-County, Connecticut |
| Surname | Johnson |
| Given Name | Leo |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Connecticut |
| 1935 Residence (City) | East Hartford |
| 1935 Residence (County) | Hartford |
| Additional Details | |
| Occupation | Clerk |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
| Occupation | Clerk |
| Township / Ward | East Hartford |
| Est. Birth Year | ~1902 |
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 Leo | Age | Birth yr |
|---|---|---|---|---|
| Clara Johnson | Spouse | — | 71 | ~1869 |
| Thomas Johnson | Head | — | 75 | ~1865 |
| Lillian Lavine | Daughter | — | 12 | ~1928 |
| Sarah Lavine | Daughter | — | 32 | ~1908 |
| Leo Johnson | Son | — | 38 | ~1902 |
| Cecile Johnson | Daughter | — | 43 | ~1897 |
Census Appearances
1930
Hartford, Connecticut
Son, age 27
Hartford, Connecticut · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Leo F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Connecticut |
| Father's Birthplace | Connecticut |
| Mother's Birthplace | Connecticut |
| Occupation | Truck Driver |
| Industry | Lumber Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1940
Hartford-County, Connecticut
Son, age 38
Hartford-County, Connecticut · implied b. ~1902 — 6 household members
| Surname | Johnson |
| Given Name | Leo |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Connecticut |
| 1935 Residence (City) | East Hartford |
| 1935 Residence (County) | Hartford |
| Occupation | Clerk |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
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 Leo Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Leo Johnson
Son · 1940 · age 38 · b. ~1902 · Connecticut
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Sibling
Sarah Lavine
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Lavine
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecile Johnson
Sibling · 1940 · age 43
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 — Hartford-County, Connecticut
Open full size
1940 US Federal Census — Hartford-County, Connecticut
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00502-00719)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Goodwin | 61 | Head | Secretary | Connecticut |
| 2 | Louise Goodwin | 59 | Wife | — | Massachusetts |
| 3 | George Jr. Goodwin | 11 | Son | — | Connecticut |
| 4 | C. Deming | 66 | Head | Mayor | Connecticut |
| 5 | Mary Deming | 52 | Wife | — | Connecticut |
| 6 | Richard Deming | 29 | Son | Draftsman | Connecticut |
| 7 | Margaret Deming | 21 | Daughter | Secretary | Connecticut |
| 8 | Charles H. Deming | 15 | Son | — | Connecticut |
| 9 | Thomas Johnson | 75 | Head | — | Connecticut |
| 10 | Clara Johnson | 71 | Wife | — | Connecticut |
| 11 | Cecile Johnson | 43 | Daughter | — | Connecticut |
| 12 | Leo Johnson THIS PERSON | 38 | Son | Clerk | Connecticut |
| 13 | Sarah Lavine | 32 | Daughter | Driver | Connecticut |
| 14 | Lillian Lavine | 12 | Daughter | — | Connecticut |
| 15 | Arne Flydal | 37 | Head | Clerk | Norway |
| 16 | Helen Flydal | 35 | Wife | Chief Clerk | Connecticut |
| 17 | George Haraghey | 34 | Lodger | Nurse | Massachusetts |
| 18 | Pauline Haraghey | 34 | Lodger | Asst. Foreman | Connecticut |
| 19 | Frank Franko | 70 | Head | Tailor | Hungary |
| 20 | Kornelia Franko | 63 | Wife | — | Hungary |
| 21 | William Franko | 22 | Son | Machine | New Jersey |
| 22 | John Shaw | 36 | Head | Inspector | Ireland |
| 23 | Hannah Shaw | 25 | Wife | Tailor | New Jersey |
| 24 | Anton Bjorklund | 61 | Head | Ice Cream | Sweden |
| 25 | Arnold Bjorklund | 20 | Son | Service Man | Massachusetts |
| 26 | Vaught Bjorklund | 25 | Son | — | Massachusetts |
| 27 | Ethel Bjorklund | 26 | Wife | Bookkeeper | Connecticut |
| 28 | Frederick Carlton | 40 | Head | Salesman | Massachusetts |
| 29 | Frances Carlton | 38 | Wife | Saleslady | Poland |
| 30 | Shirley M. Carlton | 16 | Daughter | — | Connecticut |
| 31 | Robert L. Carlton | 10 | Son | — | Connecticut |
| 32 | Max Mayer | 40 | Head | Proprietor | Germany |
| 33 | Loretta Mayer | 40 | Wife | General Work | Connecticut |
| 34 | Muriel Mayer | 18 | Daughter | — | Connecticut |
| 35 | Clement Mayer | 16 | Son | — | Connecticut |
| 36 | Earl Mayer | 8 | Son | — | Connecticut |
| 37 | Adele Leonard | 82 | Lodger | — | Connecticut |
| 38 | Christian H. Smith | 56 | Head | House Paint | Connecticut |
| 39 | Mabel O. Smith | 50 | Wife | Clerk | Connecticut |
| 40 | Lillian Smith | 29 | Daughter | Nursing | Connecticut |
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)