BJ
Bertha Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Bertha Johnson across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1853), then head of a 3-person household.
Age 87
b. ~1853
Female
Head
Born: Sweden
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Johnson |
| Given Name | Bertha |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 87 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1853 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Bertha | Age | Birth yr |
|---|---|---|---|---|
| Bertha Johnson | Head | — | 87 | ~1853 |
| Emil Johnson | Son | — | 57 | ~1883 |
| Victor Johnson | Son | — | 54 | ~1886 |
Census Appearances
1920
Cook, Illinois
Head, age 66
Cook, Illinois · implied b. ~1854 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Bertha |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| Year of Immigration | 1880 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Birth Country | Sweden |
| Year of Naturalization | 1880 |
| Birthplace (normalized) | sweden |
1930
Cook, Illinois
Other, age 76
Cook, Illinois · implied b. ~1854 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Bertha |
| Relationship to Head | Head-H |
| Sex | F |
| Color / Race | White |
| Age | 76 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| Naturalization Status | Alien |
| Year of Immigration | 1886 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1940
Cook-County, Illinois
Head, age 87
Cook-County, Illinois · implied b. ~1853 — 3 household members
| Surname | Johnson |
| Given Name | Bertha |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 87 |
| Marital Status | Widowed |
| Birthplace | Sweden |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
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 Bertha Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Bertha Johnson
Head · 1940 · age 87 · b. ~1853 · Illinois
★ 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 — 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-t0627-00942-00481)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Reba Mason | 47 | Wife | Operator | Nebraska |
| 42 | Margaret Maas | 75 | Mother | — | Ireland |
| 43 | Jack Radan | 45 | Head | Barber | Yugoslavia |
| 44 | Andrew Bazar | 40 | Partner | Chipper | Yugoslavia |
| 45 | Robert Brabbs | 36 | Head | Fireman | Illinois |
| 46 | Augusta Brabbs | 30 | Wife | — | Illinois |
| 47 | Gilbert Brabbs | 12 | Son | — | Illinois |
| 48 | Louise Brabbs | 9 | Daughter | — | Illinois |
| 49 | Robert Brabbs | 7 | Son | — | Illinois |
| 50 | Stephanie Hermanek | 56 | Head | — | Czechoslovakia |
| 51 | Anthony Hermanek | 30 | Son | Rammer | Czechoslovakia |
| 52 | Joseph Hermanek | 20 | Son | Laborer | Illinois |
| 53 | Adele Hermanek | 15 | Daughter | — | Illinois |
| 54 | Philander Bennett | 36 | Head | Inspector | Michigan |
| 55 | Mary Bennett | 35 | Wife | Place Woman | Texas |
| 56 | Philander Bennett | 14 | Son | — | Illinois |
| 57 | William Bennett | 10 | Son | — | Illinois |
| 58 | Mike Purisich | 55 | Head | Laborer | Yugoslavia |
| 59 | Mary Purisich | 35 | Wife | Housekeeper | Yugoslavia |
| 60 | Helen Purisich | 19 | Daughter | Punch Press | Illinois |
| 61 | Bertha Johnson THIS PERSON | 87 | Head | — | Sweden |
| 62 | Emil Johnson | 57 | Son | Shoveler | Illinois |
| 63 | Victor Johnson | 54 | Son | Handiman | Illinois |
| 64 | John Szafranski | 54 | Head | Laborer | Poland |
| 65 | Minnie Szafranski | 47 | Wife | — | Poland |
| 66 | Steve Szafranski | 16 | Son | — | Illinois |
| 67 | Ted Szafranski | 14 | Son | — | Illinois |
| 68 | Eugene Szafranski | 9 | Son | — | Illinois |
| 69 | Richard Szafranski | 5 | Son | — | Illinois |
| 70 | Mary Alata | 58 | Head | — | Poland |
| 71 | George Alata | 35 | Son | Operator | Poland |
| 72 | William Walker | 33 | Father in Law | Chemist | England |
| 73 | Virginia Walker | 3 | Grand Daughter | — | Illinois |
| 74 | Estell Walker | 25 | Daughter | — | Illinois |
| 75 | Andrew Demyanovich | 62 | Head | Carpenter | Czechoslovakia |
| 76 | Anna Demyanovich | 58 | Wife | — | Czechoslovakia |
| 77 | Irene Demyanovich | 20 | Daughter | Bindery | Illinois |
| 78 | Louise Demyanovich | 18 | Daughter | — | Illinois |
| 79 | Andrew Demyanovich | 35 | Head | Craneman | Illinois |
| 80 | Elizabeth Demyanovich | 27 | Wife | Filler | Illinois |
Related Census Records
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)