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Isaac Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-County, Minnesota
Our Model Tree links this Isaac Johnson across the 1900, 1910, 1920, 1930 and 1940 US Censuses in St.-Louis-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1876), then head of a 4-person household.
Age 64
b. ~1876
Male
Head
Born: Finland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Minnesota |
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Duluth city |
| 1935 Residence (County) | St. Louis |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Proprietor |
| Industry | 6th Ave Steam Bath |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 1200 |
| Highest Grade | 0 |
| 1935 Residence | Same House |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Occupation | Proprietor |
| Township / Ward | Duluth City |
| Est. Birth Year | ~1876 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Helvi Johnson | Daughter | — | 28 | ~1912 |
| Isaac Johnson | Head | — | 64 | ~1876 |
| Mayme Cunnika | Other | — | 17 | ~1923 |
| Alina Johnson | Spouse | — | 52 | ~1888 |
Census Appearances
1900
St Louis, …
Other, age 26
St Louis, Minnesota · implied b. ~1874 — 15 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Finland |
| Birth Month | Mar |
| Birth Year | 1874 |
| Year of Immigration | 1899 |
| Naturalization Status | Alien |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Laborer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | No |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1910
St Louis, …
Other, age 38
St Louis, Minnesota · implied b. ~1872 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Prisoner |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Finland |
| Year of Immigration | 1901 |
| Naturalization Status | Alien |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Laborer |
| Industry | Railroad |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1920
St Louis, …
Other, age 46
St Louis, Minnesota · implied b. ~1874 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Hired |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Single |
| Birthplace | Finland |
| Year of Immigration | 1893 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Foreman |
| Industry | General Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Finnish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1930
St Louis, …
Head, age 56
St Louis, Minnesota · implied b. ~1874
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Single |
| Birthplace | Finland |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Home Owned/Rented | O |
| Home Value / Rent | $500 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
St.-Louis-County, Minnesota
Head, age 64
St.-Louis-County, Minnesota · implied b. ~1876 — 4 household members
| Surname | Johnson |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Duluth city |
| 1935 Residence (County) | St. Louis |
| Naturalization Status | Naturalized |
| Occupation | Proprietor |
| Industry | 6th Ave Steam Bath |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 1200 |
| Highest Grade | 0 |
| 1935 Residence | Same House |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Isaac Johnson across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Isaac Johnson
Head · 1940 · age 64 · b. ~1876 · Minnesota
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — St.-Louis-County, Minnesota
Open full size
1940 US Federal Census — St.-Louis-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01973-00147)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Maurice Levine | 53 | Head | Cattle Buyer | Minnesota |
| 2 | Rose R Levine | 49 | Wife | — | Minnesota |
| 3 | Bradley Levine | 17 | Son | — | Minnesota |
| 4 | Byron Levine | 16 | Son | — | Minnesota |
| 5 | Evelyn Levine | 14 | Daughter | — | Minnesota |
| 6 | David Lieberman | 46 | Head | Salesman | Minnesota |
| 7 | Ida R Lieberman | 45 | Wife | — | Minnesota |
| 8 | Abbott Lieberman | 18 | Son | — | Minnesota |
| 9 | June Lieberman | 14 | Daughter | — | Minnesota |
| 10 | Louise Brennan | 42 | Head | Junior High Teacher | North Dakota |
| 11 | Christie Robeson | 79 | Aunt | — | Wisconsin |
| 12 | David Lieberman | 75 | Head | — | Russia |
| 13 | Kiel Sanders | 81 | Head | — | Russia |
| 14 | Sarah Sanders | 75 | Wife | — | Russia |
| 15 | Herman B Gverich | 33 | Head | Brakeman | Minnesota |
| 16 | Virginia Gverich | 23 | Wife | — | Minnesota |
| 17 | Margaret Gverich | 0 | Daughter | — | Minnesota |
| 18 | Elizabeth Gverich | 1 | Daughter | — | Minnesota |
| 19 | Jack Longis | 56 | Head | Laborer | Finland |
| 20 | Jack Jr Longis | 29 | Son | Custodian | Minnesota |
| 21 | Guy Lansdale | 32 | Son-in-law | Salesman | Finland |
| 22 | Esther Lansdale | 32 | Daughter | — | Minnesota |
| 23 | Hiram Lokke | 34 | Head | Salesman | Minnesota |
| 24 | Lolita Lokke | 31 | Wife | Graduate Nurse | Ohio |
| 25 | William Lokke | 4 | Son | — | Minnesota |
| 26 | John Lokke | 3 | Son | — | Minnesota |
| 27 | Annie Krovitz | 32 | Head | Clerk Grocery | Russia |
| 28 | S. J. Krovitz | 31 | Wife | — | New York State |
| 29 | Edward Shamblott | 50 | Head | Cattle Buyer | Russia |
| 30 | Ida Shamblott | 49 | Wife | — | Russia |
| 31 | Shaddy Shamblott | 28 | Son | Junk Buyer | Russia |
| 32 | Sally Shamblott | 27 | Daughter-in-law | — | Poland |
| 33 | Isaac Johnson THIS PERSON | 64 | Head | Proprietor | Finland |
| 34 | Alina Johnson | 52 | Wife | General Maid | Finland |
| 35 | Helvi Johnson | 28 | Daughter | Helper Maid Work | Minnesota |
| 36 | Mayme Cunnika | 17 | Lodger | — | Minnesota |
| 37 | Mike Markowitz | 75 | Head | Butcher | Poland |
| 38 | Sarah Markowitz | 73 | Wife | — | Poland |
| 39 | Harry Klazman | 38 | Head | Baker | Russia |
| 40 | Bella Klazman | 37 | Wife | — | Russia |
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)