BJ
Bertha Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Wapello-County, Iowa
Our Model Tree links this Bertha Johnson across the 1920, 1930 and 1940 US Censuses in Wapello-County, Iowa (XGBoost, ~Confirmed), with identified parents William & Maud — first a daughter (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Wapello-County, Iowa |
| Surname | Johnson |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Additional Details | |
| Occupation | bookkeeper |
| Industry | lumber co. |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 210 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Bookkeeper |
| Township / Ward | Ottumwa City |
| Est. Birth Year | ~1920 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Bertha | Age | Birth yr |
|---|---|---|---|---|
| Bertha Johnson | Daughter | — | 20 | ~1920 |
| Nina Johnson | Daughter | — | 12 | ~1928 |
| William Johnson | Head | — | 52 | ~1888 |
| Charles Johnson | Son | — | 18 | ~1922 |
| Donald Johnson | Son | — | 6 | ~1934 |
| Ruby Johnson | Son | — | 16 | ~1924 |
| John Johnson | Son | — | 11 | ~1929 |
| Gerald Johnson | Son | — | 22 | ~1918 |
| Junior Johnson | Son | — | 14 | ~1926 |
| Maude Johnson | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Wapello, Iowa
Daughter, age
Wapello, Iowa · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Wapello, Iowa
Daughter, age 10
Wapello, Iowa · implied b. ~1920 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Wapello-County, Iowa
Daughter, age 20
Wapello-County, Iowa · implied b. ~1920 — 10 household members
| Surname | Johnson |
| Given Name | Bertha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Ottumwa City |
| 1935 Residence (County) | Wapello County |
| Occupation | bookkeeper |
| Industry | lumber co. |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 210 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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. Identified parents: father William Johnson (~0.92 confidence) and mother Maud Johnson (~0.92 confidence) and father William Johnson (~0.92 confidence) and father William Johnson (~0.92 confidence) and mother Maude Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Johnson
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Maud Johnson
b. ~1887
Source mother
● Household
· direct · ~0.92
Father
William Johnson
b. ~1888
Source father
● Household
· direct · ~0.92
Father
William Johnson
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Maude Johnson
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Bertha Johnson
Daughter · 1940 · age 20 · b. ~1920 · Iowa
★ You are viewing this record
Sibling
Ruby Johnson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nina Johnson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Junior Johnson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Johnson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Johnson
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Johnson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Johnson
Sibling · 1940 · age 11
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 — Wapello-County, Iowa
Open full size
1940 US Federal Census — Wapello-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01209-00101)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Homer Howe | 56 | Head | Caretaker | Missouri |
| 2 | Goldie Howe | 52 | Wife | Housework | Missouri |
| 3 | J. H. Netherley | 58 | Head | Miner | Iowa |
| 4 | Gertie Netherley | 54 | Wife | Housework | Iowa |
| 5 | A. H. Saylor | 51 | Head | Owner | Iowa |
| 6 | Ruby Saylor | 37 | Wife | — | Missouri |
| 7 | John Saylor | 11 | Son | — | Iowa |
| 8 | Leonard Saylor | 9 | Son | — | Iowa |
| 9 | Mary Ellen Saylor | 8 | Daughter | — | Iowa |
| 10 | William Head Johnson | 52 | Head | Molder | Illinois |
| 11 | Maude Johnson | 52 | Wife | — | Iowa |
| 12 | Gerald Johnson | 22 | Son | Core Maker | Iowa |
| 13 | Bertha Johnson THIS PERSON | 20 | Daughter | Bookkeeper | Iowa |
| 14 | Charles Johnson | 18 | Son | — | Iowa |
| 15 | Ruby Johnson | 16 | Son | — | Iowa |
| 16 | Junior Johnson | 14 | Son | — | Iowa |
| 17 | Nina Johnson | 12 | Daughter | — | Iowa |
| 18 | John Johnson | 11 | Son | — | Iowa |
| 19 | Donald Johnson | 6 | Son | — | Iowa |
| 20 | Wilbur Arandus | 42 | Head | Clerk | Iowa |
| 21 | Georgia Arandus | 40 | Wife | — | Iowa |
| 22 | Harold Arandus | 17 | Son | — | Iowa |
| 23 | Carolyn Arandus | 13 | Daughter | — | Iowa |
| 24 | Casper Lloyd | 52 | Head | Laborer | Iowa |
| 25 | Alva Lloyd | 40 | Wife | — | Iowa |
| 26 | Raymond Lloyd | 21 | Son | New Worker | Iowa |
| 27 | Leo Lloyd | 18 | Son | — | Arkansas |
| 28 | Lavennia Lloyd | 12 | Daughter | — | Iowa |
| 29 | Robert Lloyd | 9 | Son | — | Iowa |
| 30 | Martha Jane Lloyd | 8 | Daughter | — | Iowa |
| 31 | James Head Kreeky | 27 | Head | Salesman | Iowa |
| 32 | Marie Kreeky | 23 | Wife | — | Iowa |
| 33 | Marilyn Jean Kreeky | 3 | Daughter | — | Iowa |
| 34 | James Kreeky | 0 | Son | — | Iowa |
| 35 | Martin Roach | 60 | Head | Laborer | Iowa |
| 36 | Mary Roach | 50 | Wife | — | Iowa |
| 37 | Vernon Gaiter | 26 | Head | Clerk | Iowa |
| 38 | Dorothy Gaiter | 23 | Wife | — | Illinois |
| 39 | Shirley Ann Gaiter | 0 | Daughter | — | Illinois |
| 40 | Leroy Swanson | 49 | Head | Salesman | Illinois |
Related Census Records
Pedigree Summary
Bertha + 7 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)