CJ
Clifford Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Clifford Johnson across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents Alice & Lulu — first a son (b.~1918), then head of a 2-person household.
Age 22
b. ~1918
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Johnson |
| Given Name | Clifford |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1918 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Clifford | Age | Birth yr |
|---|---|---|---|---|
| Lulu Johnson | Head | — | 52 | ~1888 |
| Clifford Johnson | Son | — | 22 | ~1918 |
Census Appearances
1920
San Francisco, …
Son, age 2
San Francisco, California · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Clifford |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 12
San Francisco, California · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Clifford |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Son, age 22
San-Francisco-County, California · implied b. ~1918 — 2 household members
| Surname | Johnson |
| Given Name | Clifford |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| 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 Clifford Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Alice Johnson (~0.92 confidence) and mother Lulu Johnson (~0.92 confidence) and mother Lulu Johnson (~0.92 confidence) and father Walter Johnson (~0.92 confidence) and father Walter Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Alice Johnson
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Lulu Johnson
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Lulu Johnson
b. ~1888
Source mother
● Household
· direct · ~0.92
Father
Walter Johnson
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Walter Johnson
b. ~1888
Source father
● Household
· direct · ~0.92
This person
Anchor record
Clifford Johnson
Son · 1940 · age 22 · b. ~1918 · California
★ 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 — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
35 people indexed on this census page (nara:1940:m-t0627-00321-00117)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John G. Mitchell | 28 | Head | Salesman | California |
| 42 | Jean Mitchell | 27 | Wife | — | California |
| 43 | Marilyn Mitchell | 0 | Daughter | — | California |
| 45 | Allen O. Keleary | 39 | Head | Fireman | California |
| 46 | Leontine Keleary | 31 | Wife | — | California |
| 47 | Patricia Keleary | 10 | Daughter | — | California |
| 48 | Charles Shuster | 42 | Head | Salesman | Oregon |
| 49 | Bernice Shuster | 40 | Wife | — | California |
| 50 | Bernice Shuster | 17 | Daughter | — | Oregon |
| 51 | George Nightingale | 23 | Head | Truck Driver | California |
| 52 | Isabelle Nightingale | 21 | Wife | — | California |
| 53 | Asa R. Browne | 44 | Head | Accountant | Arizona |
| 54 | Rhoda Browne | 43 | Wife | — | California |
| 55 | Helen Tanner | 24 | Lodger | Model | Utah |
| 58 | Llewellyn Campbell | 37 | Head | Accountant | Washington |
| 59 | Bernice Campbell | 31 | Wife | Booker | Minnesota |
| 60 | Milton Smith | 60 | Head | Broker | California |
| 61 | Ida Smith | 50 | Wife | Broker | California |
| 62 | George P. Mccall | 55 | Head | Engineer | England |
| 63 | Helen Mccall | 56 | Wife | — | Australia |
| 64 | Joseph S. Baldock | 60 | Head | Salesman | Massachusetts |
| 65 | Hattie Baldock | 52 | Wife | — | California |
| 66 | Lulu G. Johnson | 52 | Head | — | California |
| 67 | Clifford Johnson THIS PERSON | 22 | Son | — | California |
| 69 | Marcel Johnson | 37 | Head | Carpenter | California |
| 70 | Virginia Johnson | 37 | Wife | Stenographer | California |
| 71 | John Hall | 23 | Brother-in-law | Draftsman | Oklahoma |
| 72 | Carolyn Hall | 52 | Mother-in-law | — | Illinois |
| 73 | Charles R. Pesak | 35 | Brother | Steward | Czechoslovakia |
| 74 | Henry Wm. Cummings | 49 | Lodger | Painter | California |
| 75 | James Jr. Ringson | 28 | Son | Salesman | California |
| 76 | Elizabeth F. Ringson | 26 | Daughter-in-law | — | California |
| 77 | Victor Roman | 41 | Head | Analyst | Missouri |
| 78 | Wilda Roman | 43 | Wife | — | Ohio |
| 79 | Robert Roman | 17 | Son | — | Oregon |
Pedigree Summary
Clifford
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)