FJ
Florence Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Florence Johnson across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents Louise & Ernest — first a daughter (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Johnson |
| Given Name | Florence |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | SAN FRANCISCO |
| 1935 Residence (County) | SAN FRANCISCO |
| Additional Details | |
| Occupation | Stenographer |
| Industry | General |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Stenographer |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1909 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Florence | Age | Birth yr |
|---|---|---|---|---|
| Ethel Johnson | Daughter | — | 23 | ~1917 |
| Florence Johnson | Daughter | — | 31 | ~1909 |
| Ernest Johnson | Head | — | 59 | ~1881 |
| Arthur Johnson | Son | — | 33 | ~1907 |
| Louise Johnson | Spouse | — | 62 | ~1878 |
Census Appearances
1920
San Francisco, …
Daughter, age 10
San Francisco, California · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Florence |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Daughter, age 20
San Francisco, California · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Florence |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Stenographer |
| Industry | Ins. Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Daughter, age 31
San-Francisco-County, California · implied b. ~1909 — 5 household members
| Surname | Johnson |
| Given Name | Florence |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | SAN FRANCISCO |
| 1935 Residence (County) | SAN FRANCISCO |
| Occupation | Stenographer |
| Industry | General |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Florence Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Louise Johnson (~0.92 confidence) and father Ernest Johnson (~0.92 confidence) and father Ernest Johnson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Louise Johnson
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
Ernest Johnson
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Ernest Johnson
b. ~1883
Source father
● Household
· direct · ~0.92
This person
Anchor record
Florence Johnson
Daughter · 1940 · age 31 · b. ~1909 · California
★ You are viewing this record
Sibling
Arthur Johnson
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Johnson
Sibling · 1940 · age 23
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 — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00310-00232)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Donald De-La-Fontaine | 32 | Son | Handyman | Oregon |
| 42 | John De-La-Fontaine | 28 | Son | Coppersmith | Nevada |
| 43 | Frances De-La-Fontaine | 19 | Son | — | California |
| 44 | Ernest Johnson | 59 | Head | Housemover | Sweden |
| 45 | Louise Johnson | 62 | Wife | — | Sweden |
| 46 | Arthur Johnson | 33 | Son | Teamster | California |
| 47 | Florence Johnson THIS PERSON | 31 | Daughter | Stenographer | California |
| 48 | Ethel Johnson | 23 | Daughter | — | California |
| 49 | Claude Bush | 45 | Head | Collector | Australia |
| 50 | Evelyn Bush | 22 | Wife | Statistician | Australia |
| 51 | Earl Laguens | 29 | Head | Salesman | California |
| 52 | Muriel Laguens | 24 | Wife | Secretary | California |
| 53 | Walter Scharetz | 19 | Lodger | Helper | California |
| 54 | George Hurley | 35 | Head | Driver | California |
| 55 | Dorothy Hurley | 27 | Wife | Nurse | California |
| 56 | Dorothy Hurley | 28 | Sister | Saleslady | California |
| 57 | Max Orchid | 34 | Head | Driver | Russia |
| 58 | Gunhild Orchid | 34 | Wife | Operator | Norway |
| 59 | Robert Orchid | 12 | Son | — | California |
| 60 | Robert Mccormick | 54 | Head | Pressman | New York |
| 61 | Opal Mccormick | 35 | Wife | — | Michigan |
| 62 | James Streito | 53 | Head | Teamster | Italy |
| 63 | Annie Streito | 44 | Wife | — | California |
| 64 | Hake Eleanor Streito | 21 | Daughter | — | California |
| 65 | Henry Dernback | 47 | Head | Druggist | California |
| 66 | Carmel Dernback | 54 | Wife | — | California |
| 67 | Joseph Dernback | 54 | Brother | Distributor | Hawaii |
| 68 | Patrick Broderick | 37 | Head | Manager | New York |
| 69 | Emily Broderick | 33 | Wife | — | California |
| 70 | Joan Broderick | 8 | Daughter | — | California |
| 71 | Raymond Seyden | 28 | Head | Police Officer | California |
| 72 | Catherine Seyden | 30 | Wife | — | Illinois |
| 73 | John Starez | 64 | Father | Retired | Jugo Slavia |
| 74 | Maria Castenada | 54 | Head | Seamstress | Mexico |
| 75 | Maria Castenada | 72 | Mother | — | Mexico |
| 76 | Enedina Padilla | 44 | Sister | Milliner | Mexico |
| 77 | Raymond Padilla | 14 | Nephew | — | California |
| 78 | Emil Hearn | 58 | Head | Police Officer | California |
| 79 | Margaret Hearn | 52 | Wife | — | California |
| 80 | Lulu O'Connor | 54 | Sister | — | California |
Pedigree Summary
Florence + 2 siblings
Gen 1 · 3 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)