RM
Robert Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Clackamas-County, Oregon
Our Model Tree links this Robert Mcdonald across the 1920, 1930 and 1940 US Censuses in Clackamas-County, Oregon (XGBoost, ~Confirmed), with identified parents William & Wm — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clackamas-County, Oregon |
| Surname | McDonald |
| Given Name | Robert M. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | West Linn City |
| 1935 Residence (County) | Clackamas |
| Additional Details | |
| Occupation | Clerk |
| Industry | Retail grocery store |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 1040 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Occupation | Clerk |
| Township / Ward | West Linn City |
| Est. Birth Year | ~1919 |
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 |
|---|---|---|---|---|
| Dorothy Mcdonald | Daughter | — | 20 | ~1920 |
| Wm Mcdonald | Head | — | 50 | ~1890 |
| Robert Mcdonald | Son | — | 21 | ~1919 |
| Laura Mcdonald | Spouse | — | 40 | ~1900 |
Census Appearances
1920
Clackamas, Oregon
Son, age 1
Clackamas, Oregon · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mc Donald |
| Given Name | Robert M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Illinois |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1930
Clackamas, Oregon
Son, age 11
Clackamas, Oregon · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Clackamas-County, Oregon
Son, age 21
Clackamas-County, Oregon · implied b. ~1919 — 4 household members
| Surname | McDonald |
| Given Name | Robert M. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | West Linn City |
| 1935 Residence (County) | Clackamas |
| Occupation | Clerk |
| Industry | Retail grocery store |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 1040 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| 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: father William Mc Donald (~0.92 confidence) and father Wm Mcdonald (~0.92 confidence) and mother Laura Mcdonald (~0.92 confidence) and mother Laura Mc Donald (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Mc Donald
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Wm Mcdonald
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Laura Mcdonald
b. ~1900
Source mother
● Household
· direct · ~0.92
Mother
Laura Mc Donald
b. ~1901
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Mcdonald
Son · 1940 · age 21 · b. ~1919 · Oregon
★ You are viewing this record
Sibling
Dorothy Mcdonald
Sibling · 1940 · age 20
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 — Clackamas-County, Oregon
Open full size
1940 US Federal Census — Clackamas-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03355-00780)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joan Scharty | 8 | daughter | — | Oregon |
| 2 | Garfield J. Scharty | 41 | head | Fire Chief | Wisconsin |
| 3 | Rose M. Scharty | 39 | wife | — | Wisconsin |
| 4 | Arlene Scharty | 16 | daughter | — | Oregon |
| 5 | Burgie Scharty | 14 | daughter | — | Oregon |
| 6 | Oscar Schwartz | 40 | head | Oiler | Sweden |
| 7 | Goldie Schwartz | 32 | wife | — | Kansas |
| 8 | Betty Schwartz | 13 | daughter | — | Oregon |
| 9 | Minnie A. Schwady | 63 | head | — | Wisconsin |
| 10 | Martha Hobble | 90 | head | — | Illinois |
| 11 | Carrie Pratt | 66 | daughter | — | Nebraska |
| 12 | Kenneth A. Oliver | 28 | head | School Teacher | Oregon |
| 13 | Madaline Oliver | 27 | wife | — | Oregon |
| 14 | Wm. R. Mcdonald | 50 | head | Machinist | N. Carolina |
| 15 | Laura E. Mcdonald | 40 | wife | — | Illinois |
| 16 | Robert M. Mcdonald THIS PERSON | 21 | son | Clerk | Oregon |
| 17 | Dorothy L. Mcdonald | 20 | daughter | Stenographer | Oregon |
| 18 | Ferrell A. Heater | 39 | head | Maintenance Man | Iowa |
| 19 | Golda E. Heater | 37 | wife | — | Oregon |
| 20 | Lois M. Heater | 16 | daughter | — | Oregon |
| 21 | Maude Mcdonald | 59 | head | — | Nebraska |
| 22 | Hannah Clapp | 75 | mother | — | Illinois |
| 23 | Sta L. Hadsbury | 39 | head | — | Wisconsin |
| 24 | Le Roy O. Hadsbury | 21 | son | Retail Clerk | Oregon |
| 25 | James H. Hadsbury | 20 | son | Toilet Tissue | Oregon |
| 26 | S. N. Jenner | 70 | head | — | Austria |
| 27 | Bernadine M. Jenner | 31 | daughter | Seamstress | Oregon |
| 28 | Josephine Jenner | 18 | daughter | — | Oregon |
| 29 | Porter E. Ross | 26 | head | Laborer | Oregon |
| 30 | Lela I. Ross | 23 | wife | — | Idaho |
| 31 | Jerry P. Ross | 5 | son | — | Oregon |
| 32 | Dennis A. Ross | 2 | son | — | Oregon |
| 33 | Victor O. Heath | 22 | head | Retail Clerk | Oregon |
| 34 | Lorraine D. Heath | 20 | wife | — | Oregon |
| 35 | Douglas V. Heath | 0 | son | — | Oregon |
| 36 | J. P. Ross | 61 | head | Shipping Dept. | Washington |
| 37 | Mabel Ross | 57 | wife | Laundry | New York |
| 38 | Malcolm Reckhoff | 33 | boarder | Shipping Dept. | Washington |
| 39 | Harley E. Frazier | 31 | head | Laborer | Arkansas |
| 40 | Thelma I. Frazier | 22 | wife | — | Illinois |
Pedigree Summary
Robert + 1 sibling
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)