FB
Francis Brown — 1940 US Census Record
Model Tree available1940 United States Federal Census · King-County, Washington
Our Model Tree links this Francis Brown across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed), with identified parents Morris & Maurice — first a head (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Head
Born: Washington
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Brown |
| Given Name | Francis D. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | Sylvan precinct |
| 1935 Residence (County) | King |
| Additional Details | |
| Occupation | mechanic |
| Industry | airplane plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1066 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Mechanic |
| Township / Ward | Sylvan Precinct |
| Est. Birth Year | ~1910 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Francis | Age | Birth yr |
|---|---|---|---|---|
| Carolyn Brown | Daughter | — | 5 | ~1935 |
| Francis Brown | Head | — | 30 | ~1910 |
| Charles Brown | Son | — | ~1940 | |
| Winifred Brown | Spouse | — | 28 | ~1912 |
Census Appearances
1920
King, Washington
Son, age 9
King, Washington · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Francis |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
King, Washington
Son, age 20
King, Washington · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Francis L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Occupation | Salesman |
| Industry | Grocery Store |
| Class of Worker | 4590 |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Head, age 30
King-County, Washington · implied b. ~1910 — 4 household members
| Surname | Brown |
| Given Name | Francis D. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | Sylvan precinct |
| 1935 Residence (County) | King |
| Occupation | mechanic |
| Industry | airplane plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1066 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 Francis Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Morris Brown (~0.92 confidence) and father Maurice Brown (~0.92 confidence) and mother Grace Brown (~0.92 confidence) and mother Lannie Brown (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Morris Brown
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Maurice Brown
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Grace Brown
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Lannie Brown
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Francis Brown
Head · 1940 · age 30 · b. ~1910 · Washington
★ 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 — 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-t0627-04346-00661)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Domonoske | 15 | son | — | Montana |
| 42 | Victor E. Johnson | 55 | head | Mechanic | Minnesota |
| 43 | Lavina M. Johnson | 46 | wife | — | Michigan |
| 44 | Mary V. Culbertson | 5 | daughter | — | Washington |
| 45 | Hugh M. Garvin | 54 | head | Washman | Wash. D.C. |
| 46 | Helen V. Garvin | 48 | wife | — | Illinois |
| 47 | Earl E. Garvin | 19 | son | General Lab. | Washington |
| 48 | Robert E. Garvin | 17 | son | — | Washington |
| 49 | Norman S. Garvin | 14 | son | — | Washington |
| 50 | John G. Larsen | 58 | head | Helper | Sweden |
| 51 | John Coomes | 50 | lodger | — | Virginia |
| 52 | John Joensch | 39 | head | Longshoreman | Norway |
| 53 | Alma O. Joensch | 31 | wife | Cook | North Dakota |
| 54 | Bernice Matthy | 55 | head | — | Washington |
| 55 | Darcy Matthy | 26 | son | Helper | Washington |
| 56 | Hermina E. Matthy | 16 | daughter | — | Washington |
| 57 | James G. Peterson | 23 | head | Mechanic | Oregon |
| 58 | Bernice Peterson | 21 | wife | — | Washington |
| 59 | Jack D. Connors | 51 | head | Blacksmith | Montana |
| 60 | Alice Connors | 46 | wife | Helper | Montana |
| 61 | William Connors | 15 | son | — | Washington |
| 62 | Carol Connors | 7 | daughter | — | Washington |
| 63 | Haucher Reinoldy | 43 | head | Helper | Switzerland |
| 64 | Clyde Harrison | 24 | head | Setter | Missouri |
| 65 | Dolly D. Harrison | 25 | wife | — | Washington |
| 66 | Clyde Jr. Harrison | 5 | son | — | Washington |
| 67 | Francis D. Brown THIS PERSON | 30 | head | Mechanic | Washington |
| 68 | Winifred Brown | 28 | wife | — | Oregon |
| 69 | Carolyn Brown | 5 | daughter | — | Washington |
| 70 | Charles Maurice Brown | 0 | son | — | Washington |
| 71 | Charles Wilson | 35 | head | Mechanic | Minnesota |
| 72 | Helen G. Wilson | 29 | wife | — | Washington |
| 73 | Gordon Wilson | 11 | son | — | Washington |
| 74 | Charles Wilson | 8 | son | — | Washington |
| 75 | Walter Brunke | 54 | head | Melter | Wisconsin |
| 76 | Vera Brunke | 39 | wife | — | Sweden |
| 77 | William Brunke | 17 | son | — | Washington |
| 78 | George E. Stone | 52 | head | Housecleaning | Indiana |
| 79 | Mae Belknap | 56 | sister | — | Pennsylvania |
| 80 | M. W. White | 37 | head | Bridgeman | Iowa |
Pedigree Summary
Francis
Gen 1 · 4 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)