AS
Alfred Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Alfred Smith across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents James & Marie — first a son (b.~1905), then head of a 3-person household.
Age 35
b. ~1905
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Smith |
| Given Name | Alfred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco City |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | Brakeman |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 900 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Brakeman |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1905 |
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 Alfred | Age | Birth yr |
|---|---|---|---|---|
| Ernest Smith | Head | — | 64 | ~1876 |
| Alfred Smith | Son | — | 35 | ~1905 |
| Marie Smith | Spouse | — | 66 | ~1874 |
Census Appearances
1920
San Francisco, …
Son, age 15
San Francisco, California · implied b. ~1905 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Alfred P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 25
San Francisco, California · implied b. ~1905 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Alfred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Plasterer |
| Industry | Contractor |
| Class of Worker | E |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Son, age 35
San-Francisco-County, California · implied b. ~1905 — 3 household members
| Surname | Smith |
| Given Name | Alfred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco City |
| 1935 Residence (County) | San Francisco |
| Occupation | Brakeman |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 900 |
| Highest Grade | Hs 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 Alfred Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Smith (~0.92 confidence) and mother Marie Smith (~0.92 confidence) and father James Smith (~0.92 confidence) and mother Jennie Smith (~0.92 confidence) and father Ernest Smith (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Smith
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Marie Smith
b. ~1874
Source mother
● Household
· direct · ~0.92
Father
James Smith
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Jennie Smith
b. ~1875
Source mother
● Household
· direct · ~0.92
Father
Ernest Smith
b. ~1876
Source father
● Household
· direct · ~0.92
This person
Anchor record
Alfred Smith
Son · 1940 · age 35 · b. ~1905 · 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
40 people indexed on this census page (nara:1940:m-t0627-00301-00586)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James S Grider | 36 | Head | Writer | Pennsylvania |
| 2 | Fanny Grider | 33 | Wife | — | Montana |
| 3 | Mildred Grider | 12 | Daughter | — | California |
| 4 | Ruth Grider | 11 | Daughter | — | California |
| 5 | Frank Barney | 45 | Head | Janitor | Montana |
| 6 | Blanche Barney | 58 | Wife | — | Minnesota |
| 7 | Ann Carroll | 27 | Head | Nurses | Canada English |
| 8 | Edith Clark | 28 | Roommate | Nurse | Canada English |
| 9 | Frances Kuchynka | 26 | Roommate | Nurse | Minnesota |
| 10 | Robert Mcculloch | 35 | Head | Manager | California |
| 11 | Florence Mcculloch | 32 | Wife | — | California |
| 12 | Robert Jr Mcculloch | 6 | Son | — | California |
| 13 | Lawrence Parodi | 28 | Head | Attendant | California |
| 14 | Regina Parodi | 27 | Wife | — | California |
| 15 | Raymond Parodi | 3 | Son | — | California |
| 16 | Frederick O'Neill | 38 | Head | Shipping Clerk | California |
| 17 | Bertha O'Neill | 36 | Wife | — | Illinois |
| 18 | Lawrence O'Neill | 13 | Son | — | California |
| 19 | Lorraine O'Neill | 10 | Daughter | — | California |
| 20 | Rosemary O'Neill | 7 | Daughter | — | California |
| 21 | Vernon O'Neill | 5 | Son | — | California |
| 22 | Eleanor O'Neill | 2 | Daughter | — | California |
| 23 | Joseph Von Bamuer | 33 | Head | Carver | Wisconsin |
| 24 | Louella Von Bamuer | 27 | Wife | — | Washington |
| 25 | Gay Von Bamuer | 8 | Daughter | — | California |
| 26 | Ervin Von Bamuer | 6 | Son | — | California |
| 27 | Betty June Von Bamuer | 1 | Daughter | — | California |
| 28 | George Barrett | 67 | Head | Barber | Washington |
| 29 | Cecelia Barrett | 59 | Wife | Presser | Wisconsin |
| 30 | Charles Baireuther | 36 | Head | Butcher | California |
| 31 | Marie Baireuther | 29 | Wife | — | California |
| 32 | Charles Baireuther | 5 | Son | — | California |
| 33 | Albert Baireuther | 29 | Head | Butcher | California |
| 34 | Lotta Baireuther | 24 | Wife | Stenographer | California |
| 35 | John Sullivan | 70 | Head | — | Eire |
| 36 | Mary Sullivan | 60 | Wife | — | Eire |
| 37 | Ernest Smith | 64 | Head | — | Indiana |
| 38 | Marie Smith | 66 | Wife | — | California |
| 39 | Alfred Smith THIS PERSON | 35 | Son | Brakeman | California |
| 40 | Fred Brau | 46 | Head | Pressman | Nebraska |
Pedigree Summary
Alfred
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)