RM
Robert Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Grays-Harbor-County, Washington
Our Model Tree links this Robert Mcdonald across the 1920, 1930 and 1940 US Censuses in Grays-Harbor-County, Washington (XGBoost, ~Confirmed), with identified parents Emily & Ernest — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Grays-Harbor-County, Washington |
| Surname | McDonald |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Westport Washington |
| Additional Details | |
| Occupation | Laborer |
| Industry | Canning Co. |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 240 |
| Highest Grade | No 7 |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Occupation | Laborer |
| Township / Ward | Westport Washington |
| Est. Birth Year | ~1915 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Ernest Mcdonald | Head | — | 56 | ~1884 |
| Richard Mcdonald | Son | — | 11 | ~1929 |
| Robert Mcdonald | Son | — | 25 | ~1915 |
| Emily Mcdonald | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Grays Harbor, …
Son, age 5
Grays Harbor, Washington · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacDonald |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1930
Grays Harbor, …
Son, age 15
Grays Harbor, Washington · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Donald |
| Given Name | Robert G |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Grays-Harbor-County, Washington
Son, age 25
Grays-Harbor-County, Washington · implied b. ~1915 — 4 household members
| Surname | McDonald |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Westport Washington |
| Occupation | Laborer |
| Industry | Canning Co. |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 240 |
| Highest Grade | No 7 |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
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 Robert Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Emily Mcdonald (~0.92 confidence) and father Ernest Mcdonald (~0.92 confidence) and father Irving Mc Donald (~0.92 confidence) and father Isaac Macdonald (~0.92 confidence) and mother Matilda Macdonald (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Emily Mcdonald
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Ernest Mcdonald
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Irving Mc Donald
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Isaac Macdonald
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Matilda Macdonald
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Mcdonald
Son · 1940 · age 25 · b. ~1915 · Washington
★ You are viewing this record
Sibling
Richard Mcdonald
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Grays-Harbor-County, Washington
Open full size
1940 US Federal Census — Grays-Harbor-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04341-00750)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Juanita Rynvaan | 22 | Wife | — | Washington |
| 42 | Billie Rynvaan | 1 | Daughter | — | Washington |
| 43 | Edwin Kaskinen | 30 | Head | Fish Buyer | Washington |
| 44 | Lila Kaskinen | 24 | Wife | Beauty Parlor Op | Washington |
| 45 | Herman Flowers | 72 | Head | — | Missouri |
| 46 | Nannie Flowers | 70 | Wife | — | Virginia |
| 47 | Ed Bowery | 60 | Head | — | Illinois |
| 48 | John W. Parsons | 71 | Head | — | Virginia |
| 49 | Clara Parsons | 65 | Wife | — | Kansas |
| 50 | Dorothy Perkins | 21 | Wife | — | Washington |
| 51 | Ernest Mcdonald | 56 | Head | Cement Finisher | Illinois |
| 52 | Emily Mcdonald | 56 | Wife | — | Illinois |
| 53 | Robert Mcdonald THIS PERSON | 25 | Son | Laborer | Oregon |
| 54 | Richard Mcdonald | 11 | Son | — | Washington |
| 55 | Donald Mccune | 20 | Head | Laborer | Iowa |
| 56 | Evelyn Mccune | 18 | Wife | — | Nebraska |
| 57 | W. L. Markley | 65 | Head | Concrete | Penn. |
| 58 | Nellie Markley | 58 | Wife | — | New York |
| 59 | Clarence Chamberlain | 46 | Head | Field Man | Missouri |
| 60 | Dorothy Chamberlain | 25 | Wife | — | Washington |
| 61 | Clifford Chamberlain | 5 | Son | — | Washington |
| 62 | Robert Chamberlain | 4 | Son | — | Washington |
| 63 | Adam Balmer | 78 | Head | — | England |
| 64 | Herman Schuman | 30 | Head | Truck Driver | Okla. |
| 65 | Louise Schuman | 24 | Wife | — | California |
| 66 | Margaret Martin | 28 | Sister | — | Okla. |
| 67 | Grace Loughurst | 38 | Head | — | Michigan |
| 68 | William Smith | 34 | Head | M. Man | Oregon |
| 69 | Ethel Smith | 31 | Wife | — | Oregon |
| 70 | Phyllis Smith | 11 | Daughter | — | Oregon |
| 71 | William Smith | 7 | Son | — | Washington |
| 72 | Ernest Ammon | 79 | Head | — | Sweden |
| 73 | Jessie Ammon | 65 | Wife | — | Illinois |
| 74 | Bill Monsen | 43 | Head | Tavern Owner | Washington |
| 75 | Robert Mccracken | 20 | Lodger | New Worker | Washington |
| 76 | Ray Hall | 38 | Head | — | N. Carolina |
| 77 | Berkeley Hall | 22 | Wife | — | Canada |
| 78 | Sharon Hall | 1 | Daughter | — | Alaska |
| 79 | Larry Hall | 4 | Son | — | Washington |
| 80 | Elmer Mellem | 39 | Head | Pile Driver | N. Dakota |
Pedigree Summary
Robert + 1 sibling
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)