WM
William Mcdonald — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Mateo-County, California
Our Model Tree links this William Mcdonald across the 1920, 1930 and 1940 US Censuses in San-Mateo-County, California (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 5-person household.
Age 60
b. ~1880
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Mateo-County, California |
| Surname | McDonald |
| Given Name | William |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | San Mateo City |
| 1935 Residence (County) | San Mateo |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Gardener |
| Industry | Private Estate |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1420 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Gardener |
| Township / Ward | San Mateo City |
| Est. Birth Year | ~1880 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Anne Mcdonald | Daughter | — | 20 | ~1920 |
| William Mcdonald | Head | — | 60 | ~1880 |
| Robert Fischer | Other | — | 26 | ~1914 |
| Vivian Fischer | Other | — | 26 | ~1914 |
| Elizabeth Mcdonald | Spouse | — | 63 | ~1877 |
Census Appearances
1920
San Francisco, …
Head, age 40
San Francisco, California · implied b. ~1880 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | William |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Scotland |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Waiter |
| Industry | Ships |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Year of Naturalization | 1904 |
| Birthplace (normalized) | scotland |
1930
San Mateo, …
Head, age 50
San Mateo, California · implied b. ~1880 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1912 |
| Age at First Marriage | 27 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Gardener |
| Industry | Private family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 50.00 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
San-Mateo-County, California
Head, age 60
San-Mateo-County, California · implied b. ~1880 — 5 household members
| Surname | McDonald |
| Given Name | William |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | San Mateo City |
| 1935 Residence (County) | San Mateo |
| Naturalization Status | Naturalized |
| Occupation | Gardener |
| Industry | Private Estate |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1420 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 William Mcdonald across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
William Mcdonald
Head · 1940 · age 60 · b. ~1880 · California
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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 — San-Mateo-County, California
Open full size
1940 US Federal Census — San-Mateo-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00330-00371)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Louise Darrow | 45 | lodger | Servant | Wisconsin |
| 42 | Hazel Mccarthy | 40 | lodger | Nurse | Iowa |
| 43 | Esther Stewart | 35 | lodger | Nurse | Michigan |
| 44 | Rene Roudy | 34 | head | Truck Driver | California |
| 45 | Delphine Roudy | 33 | wife | — | France |
| 46 | Robert Roudy | 8 | son | — | California |
| 47 | Marie-Louise Almen | 67 | lodger | — | France |
| 48 | Dorothy Heine | 32 | lodger | Nurse | Oklahoma |
| 49 | Elizabeth O'Grady | 48 | head | — | California |
| 50 | Gerald O'Grady | 28 | son | Mechanist | California |
| 51 | James Miller | 24 | lodger | Clerk | Illinois |
| 52 | Henry Clark | 74 | head | — | Maine |
| 53 | Carrie Clark | 61 | wife | — | Maine |
| 54 | Son Putnam | None | M | Sugar | — |
| 55 | Sister Pamela | None | F | — | — |
| 56 | Ella Mae Doane | 76 | head | — | California |
| 57 | John J. Casey | 81 | head | — | California |
| 58 | Rose Casey | 67 | wife | — | California |
| 59 | Mae Casey | 40 | daughter | Nurse | California |
| 60 | Florence Casey | 32 | daughter | Secretary | California |
| 61 | George E. Eckhardt | 65 | head | — | California |
| 62 | Katherine Eckhardt | 44 | wife | — | Scotland |
| 63 | Dorothy Eckhardt | 6 | daughter | — | California |
| 64 | William Mcdonald THIS PERSON | 60 | head | Gardener | Scotland |
| 65 | Elizabeth Mcdonald | 63 | wife | — | Scotland |
| 66 | Anne E. Mcdonald | 20 | daughter | Bookkeeper | California |
| 67 | Robert Fischer | 26 | lodger | Secretary-Treasurer | California |
| 68 | Vivian Fischer | 26 | lodger | Clerk | Kansas |
| 69 | William Wiley | 54 | head | Painter | California |
| 70 | Cecelia Wiley | 51 | wife | — | California |
| 71 | Lillian Berard | 21 | lodger | Domestic | California |
| 72 | John Broadwood | 34 | lodger | Attendant | California |
| 73 | Mary Broadwood | 33 | lodger | Sales Lady | California |
| 74 | Jasper Russet | 49 | lodger | Draftsman | Iowa |
| 75 | Katherine Freis | 25 | lodger | Librarian | California |
| 76 | Alonzo M. Roberts | 61 | head | Service Man | Ohio |
| 77 | Rhoda Roberts | 60 | wife | — | Iowa |
| 78 | Irving J. Onyon | 36 | lodger | Clerk | California |
| 79 | Donald Mcmasters | 22 | head | Clerk | So Dakota |
| 80 | Hilma Mcmasters | 22 | wife | Clerk | Kansas |
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)