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John Briggs — 1940 US Census Record
Linked across censuses1940 United States Federal Census · King-County, Washington
Our Model Tree links this John Briggs across the 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed) — first a head (b.~1900), then head of a 5-person household.
Age 40
b. ~1900
Male
Head
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Briggs |
| Given Name | John S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Sonora Precinct |
| 1935 Residence (County) | King |
| Additional Details | |
| Occupation | Sound Engineer |
| Industry | Motion Picture |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 4200 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Sound Engineer |
| Township / Ward | Sonora Precinct |
| Est. Birth Year | ~1900 |
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 |
|---|---|---|---|---|
| Richard Briggs | Son | — | 9 | ~1931 |
| John Briggs | Head | — | 40 | ~1900 |
| Margaret Briggs | Spouse | — | 35 | ~1905 |
| John Briggs | Son | — | ~1940 | |
| James Briggs | Son | — | 14 | ~1926 |
Census Appearances
1930
King, Washington
Head, age 30
King, Washington · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Briggs |
| Given Name | John S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 25 |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Engineer |
| Industry | Electrical |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 65.00 |
| Radio Set | R |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
King-County, Washington
Head, age 40
King-County, Washington · implied b. ~1900 — 5 household members
| Surname | Briggs |
| Given Name | John S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Sonora Precinct |
| 1935 Residence (County) | King |
| Occupation | Sound Engineer |
| Industry | Motion Picture |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 4200 |
| Highest Grade | C 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 John Briggs across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Briggs
Head · 1940 · age 40 · b. ~1900 · Washington
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — King-County, Washington
Open full size
1940 US Federal Census — King-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04346-00458)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ronald Gillings | 12 | Son | — | Washington |
| 42 | Harold Gaiduck | 39 | Head | Purch Agent | Washington |
| 43 | Grace Gaiduck | 35 | Wife | — | Alaska |
| 44 | Joan Gaiduck | 12 | Daughter | — | Washington |
| 45 | Harold Gaiduck | 6 | Son | — | Washington |
| 46 | John S. Briggs THIS PERSON | 40 | Head | Sound Engineer | California |
| 47 | Margaret Briggs | 35 | Wife | — | Oregon |
| 48 | James S. Briggs | 14 | Son | — | Illinois |
| 49 | Richard Briggs | 9 | Son | — | Washington |
| 50 | John R. Briggs | 0 | Son | — | Washington |
| 51 | Edwin Dahlgren | 33 | Head | Biologist | Washington |
| 52 | Dorothy Dahlgren | 34 | Wife | — | Illinois |
| 53 | Edwin G. Dahlgren | 7 | Son | — | Washington |
| 54 | Daniel Dahlgren | 5 | Son | — | Washington |
| 55 | Ernest A. Oleon | 47 | Head | Sales Agent | Nebraska |
| 56 | Audrey Oleon | 45 | Wife | — | Nebraska |
| 57 | Richard Robblee | 31 | Head | Automotive Equipment | Washington |
| 58 | Kay Robblee | 31 | Wife | — | Iowa |
| 59 | Elinor Robblee | 5 | Daughter | — | Washington |
| 60 | Erik Naslund | 57 | Head | Partnership Grocer | Sweden |
| 61 | Nora D. Naslund | 49 | Wife | — | Minnesota |
| 62 | Joseph Albert | 36 | Head | Meat Cutter | New Jersey |
| 63 | B. Bernice Albert | 28 | Wife | — | Washington |
| 64 | Joseph A. Albert | 5 | Son | — | Washington |
| 65 | Frank M. Shaw | 34 | Head | Assistant Manager | Washington |
| 66 | Ruth Shaw | 29 | Wife | Assistant | Washington |
| 67 | Wilson Hester Shaw | 56 | Mother-in-law | — | Kentucky |
| 68 | George Agner | 55 | Head | Supervisor Telephone | Iowa |
| 69 | Marjory D. Agner | 38 | Wife | — | Missouri |
| 70 | George Agner | 18 | Son | — | Washington |
| 71 | Robert Agner | 14 | Son | — | Washington |
| 72 | Claude Havens | 53 | Head | Enforcement Officer | Mississippi |
| 73 | Calla B. Havens | 50 | Wife | — | Iowa |
| 74 | Orlando Halliday | 24 | Brother-in-law | — | Ohio |
| 75 | William Halliday | 23 | Son | Owner Delicatessen | Missouri |
| 76 | Zetta Halliday | 20 | Daughter | Partner Delicatessen | Missouri |
| 77 | Leslie Modeen | 35 | Head | Cashier | Illinois |
| 78 | Sigrid Modeen | 34 | Wife | — | Norway |
| 79 | Roger L. Modeen | 1 | Son | — | Washington |
| 80 | Clarence M. Kilborn | 41 | Head | Salesman | Canada |
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)