JR
James Robertson — 1940 US Census Record
Model Tree available1940 United States Federal Census · King-County, Washington
Our Model Tree links this James Robertson across the 1900, 1910, 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed), with identified parents James & Martha — first a head (b.~1899), then head of a 4-person household.
Age 41
b. ~1899
Male
Head
Born: Washington
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Robertson |
| Given Name | James L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Additional Details | |
| Occupation | Civil Engineer |
| Industry | City Eng. Dept |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 16 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Civil Engineer |
| Township / Ward | Seattle City |
| Est. Birth Year | ~1899 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Marian Robertson | Daughter | — | 3 | ~1937 |
| James Robertson | Head | — | 41 | ~1899 |
| Donald Robertson | Son | — | ~1940 | |
| Sadie Robertson | Spouse | — | 38 | ~1902 |
Census Appearances
1900
King, Washington
Son, age 1
King, Washington · implied b. ~1899 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Washington |
| Birth Month | June |
| Birth Year | 1899 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1910
King, Washington
Son, age 11
King, Washington · implied b. ~1899 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1920
King, Washington
Son, age 21
King, Washington · implied b. ~1899 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson |
| Given Name | James Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Meter Reader |
| Industry | City Water Dept. |
| Class of Worker | W |
| Can Read | No |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
King, Washington
Head, age 31
King, Washington · implied b. ~1899 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson Jr. |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Washington |
| Age at First Marriage | 25 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | engineer |
| Industry | construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6,000 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Head, age 41
King-County, Washington · implied b. ~1899 — 4 household members
| Surname | Robertson |
| Given Name | James L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Occupation | Civil Engineer |
| Industry | City Eng. Dept |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 16 |
| Highest Grade | Hs 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 James Robertson across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Robertson (~0.92 confidence) and mother Martha Robertson (~0.92 confidence) and mother Martha Robertson (~0.92 confidence) and mother Martha Robertson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Robertson
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Martha Robertson
b. ~1861
Source mother
● Household
· direct · ~0.92
Mother
Martha Robertson
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Martha Robertson
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Robertson
Head · 1940 · age 41 · b. ~1899 · 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
37 people indexed on this census page (nara:1940:m-t0627-04381-00585)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Phyllis L. Anderson | 10 | Daughter | — | Washington |
| 2 | Harold L. Anderson | 7 | Son | — | Washington |
| 4 | Anton M. Hansen | 56 | Head | Fisherman | Norway |
| 5 | Minnie Hansen | 49 | Wife | — | Minnesota |
| 6 | June H. Hansen | 21 | Daughter | Stenographer | Washington |
| 7 | Rosalie G. Hansen | 9 | Daughter | — | Washington |
| 8 | Hazel E. Davis | 41 | Head | — | Washington |
| 9 | Virginia Davis | 18 | Daughter | New Worker | Washington |
| 10 | Raurelie Davis | 16 | Daughter | — | Oregon |
| 11 | Jack B. Landstrom | 20 | Lodger | Galvanizer | Washington |
| 13 | Nordal Hrostad | 34 | Head | Truck Driver | Norway |
| 14 | Maude Hrostad | 30 | Wife | — | Washington |
| 15 | Edgar W. Suther | 37 | Head | Real Estate Salesman | North Dakota |
| 16 | Marcia Suther | 29 | Wife | — | Idaho |
| 17 | Jon W. Suther | 4 | Son | — | Washington |
| 18 | Gilman Suther | 24 | Cousin | Carpenter | Wisconsin |
| 19 | Jack Davidson | 30 | Head | Mechanic | Washington |
| 20 | Ruth E. Davidson | 27 | Wife | — | Washington |
| 21 | Donna Davidson | 6 | Daughter | — | Washington |
| 22 | Jack Davidson | 5 | Son | — | Washington |
| 23 | Eugene J. Curcio | 36 | Head | Dental Technician | Washington |
| 24 | Gladys Curcio | 37 | Wife | — | Michigan |
| 25 | Jeanne Curcio | 3 | Daughter | — | Washington |
| 26 | Joseph Curcio | 1 | Son | — | Washington |
| 27 | Shirley G. Blood | 14 | Maid | Maid | Washington |
| 28 | William F. Hanson | 58 | Head | Master Mariner | Washington |
| 29 | Margaret Hanson | 50 | Wife | — | Denmark |
| 30 | James L. Robertson THIS PERSON | 41 | Head | Civil Engineer | Washington |
| 31 | Sadie W. Robertson | 38 | Wife | — | Canada English |
| 32 | Marian Robertson | 3 | Daughter | — | Washington |
| 33 | Donald Robertson | 0 | Son | — | Washington |
| 35 | Arthur Ochsner | 46 | Head | Bond Salesman | California |
| 36 | Amelia Ochsner | 46 | Wife | — | Washington |
| 37 | Robert H. Ochsner | 18 | Son | — | Washington |
| 38 | Walter L. Ochsner | 16 | Son | — | Washington |
| 39 | Alyse M. Ochsner | 12 | Daughter | — | Washington |
| 40 | Margaret Fruit | 46 | Head | Saleslady | Scotland |
Pedigree Summary
James
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)