JH
John Henderson — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Mateo-County, California
Our Model Tree links this John Henderson across the 1920, 1930 and 1940 US Censuses in San-Mateo-County, California (XGBoost, ~Confirmed), with identified parents John & Ellen — first a head (b.~1904), then head of a 5-person household.
Age 36
b. ~1904
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Mateo-County, California |
| Surname | Henderson |
| Given Name | John F. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Palo Alto |
| 1935 Residence (County) | Santa Clara |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Steam fitter |
| Industry | Plumbing and Heating Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 348 |
| Highest Grade | Hs 4 |
| 1935 Residence | California |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Steam Fitter |
| Township / Ward | North Palo Alto |
| Est. Birth Year | ~1904 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Henderson | Head | — | 36 | ~1904 |
| Charles Henderson | Son | — | 5 | ~1935 |
| Robert Henderson | Son | — | 9 | ~1931 |
| J Henderson | Son | — | 11 | ~1929 |
| Bessie Henderson | Spouse | — | 34 | ~1906 |
Census Appearances
1920
Monterey, California
Son, age 16
Monterey, California · implied b. ~1904 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Henderson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Scotland |
| Year of Immigration | 1911 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Year of Naturalization | 1917 |
| Birthplace (normalized) | scotland |
1930
Alameda, California
Head, age 27
Alameda, California · implied b. ~1903 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Henderson |
| Given Name | John S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Alien |
| Year of Immigration | 1911 |
| Age at First Marriage | 21 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Engineer |
| Industry | Steel |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
San-Mateo-County, California
Head, age 36
San-Mateo-County, California · implied b. ~1904 — 5 household members
| Surname | Henderson |
| Given Name | John F. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Palo Alto |
| 1935 Residence (County) | Santa Clara |
| Naturalization Status | Naturalized |
| Occupation | Steam fitter |
| Industry | Plumbing and Heating Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 348 |
| Highest Grade | Hs 4 |
| 1935 Residence | California |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 John Henderson across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father John Henderson (~0.92 confidence) and mother Ellen Henderson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Henderson
b. ~1868
Source father
● Household
· direct · ~0.92
Mother
Ellen Henderson
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Henderson
Head · 1940 · age 36 · b. ~1904 · 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-Mateo-County, California
Open full size
1940 US Federal Census — San-Mateo-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00331-00655)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Earl R. Jr. Hinrichs | 11 | son | — | California |
| 42 | Gary B. Hinrichs | 10 | son | — | California |
| 43 | Ella M. Boren | 57 | mother-in-law | Housekeeper | Missouri |
| 44 | Leonard A. Smith | 42 | Head | Executive Treasurer | England |
| 45 | Anna E. Smith | 42 | wife | — | England |
| 46 | Arthur H. Smith | 19 | son | Gen'L Office Work | Canada English |
| 47 | Frederick L. Smith | 17 | son | — | Canada English |
| 48 | Kathleen C. Smith | 16 | daughter | — | California |
| 49 | Robert A. Smith | 7 | son | — | California |
| 50 | John F. Henderson THIS PERSON | 36 | head | Steam Fitter | Scotland |
| 51 | Bessie M. Henderson | 34 | wife | — | England |
| 52 | J. Arthur Henderson | 11 | son | — | California |
| 53 | Robert E. Henderson | 9 | son | — | California |
| 54 | Charles E. Henderson | 5 | son | — | California |
| 55 | Jacob V. Bowman | 59 | head | Meat Cutter | Colorado |
| 56 | Mary Bowman | 59 | wife | — | Kentucky |
| 57 | George P. Baldwin | 47 | head | Insurance Broker | Canada English |
| 58 | Marguerite H. Baldwin | 45 | wife | Saleswoman | Canada English |
| 59 | Donald P. Baldwin | 20 | son | — | Michigan |
| 60 | Claude S. Inman | 53 | head | Superintendent | Kansas |
| 61 | Maybelle C. Inman | 51 | wife | — | California |
| 62 | Raymond C. Inman | 22 | son | Shipping Clerk | California |
| 63 | Ernest J. Meyer | 31 | head | Baker | Germany |
| 64 | Matilda Meyer | 27 | wife | — | California |
| 65 | Katherine M. Meyer | 5 | daughter | — | California |
| 66 | Carolyn M. Meyer | 1 | daughter | — | California |
| 67 | Paul A. Ginier | 29 | head | Chef | Pennsylvania |
| 68 | Velma M. Ginier | 24 | wife | Waitress | Italy |
| 69 | Sidney M. Dicken | 57 | head | Chef | Nebraska |
| 70 | Ida M. Dicken | 60 | wife | — | Kansas |
| 71 | Howard Stafford | 47 | head | Salesman | Nebraska |
| 72 | Clara C. Stafford | 44 | wife | — | Nebraska |
| 73 | William C. King | 37 | head | Pharmacist | China |
| 74 | Alice C. King | 39 | wife | Saleslady | New Mexico |
| 75 | Thelma L. King | 12 | daughter | — | California |
| 76 | Marilyn J. King | 8 | daughter | — | California |
| 77 | Valerie F. King | 4 | daughter | — | California |
| 78 | Gardner H. Brewer | 39 | head | Plant Superintendent | Massachusetts |
| 79 | Lesley R. Brewer | 40 | wife | — | Montana |
| 80 | Marjorie L. Brewer | 9 | daughter | — | California |
Pedigree Summary
John
Gen 1 · 2 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)