WM
William Macdonald — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this William Macdonald across the 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 7-person household.
Age 62
b. ~1878
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | MacDonald |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Mason |
| Industry | Home Construction |
| Class of Worker | PW |
| Hours Worked | 10 |
| Income (1939) | 1700 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Mason |
| Township / Ward | Princeton Borough |
| Est. Birth Year | ~1878 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Alice Macdonald | Daughter | — | 20 | ~1920 |
| Annie Macdonald | Spouse | — | 64 | ~1876 |
| William Macdonald | Head | — | 62 | ~1878 |
| Janet Fiedler | Daughter | — | 5 | ~1935 |
| Martha Fiedler | Daughter | — | 8 | ~1932 |
| Mildred Fiedler | Daughter | — | 39 | ~1901 |
| David Macdonald | Son | — | 23 | ~1917 |
Census Appearances
1930
Mercer, New …
Other, age 50
Mercer, New Jersey · implied b. ~1880 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacDonald |
| Given Name | William |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1900 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Laborer |
| Industry | Rubber Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Mercer-County, New …
Head, age 62
Mercer-County, New Jersey · implied b. ~1878 — 7 household members
| Surname | MacDonald |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Naturalization Status | Naturalized |
| Occupation | Mason |
| Industry | Home Construction |
| Class of Worker | PW |
| Hours Worked | 10 |
| Income (1939) | 1700 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| 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 Macdonald across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Macdonald
Head · 1940 · age 62 · b. ~1878 · New Jersey
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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 — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02357-00488)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alice C. Margerum | 66 | Wife | — | New Jersey |
| 2 | Stephen C. Margerum | 33 | Son | Carpenter | New Jersey |
| 3 | Alice Margerum | 28 | Daughter | Stenographer | New Jersey |
| 4 | Theresa Margerum | 20 | Daughter | — | New Jersey |
| 5 | Robert A. Benham | 46 | Head | Owner | New Jersey |
| 6 | Adelia G. Benham | 47 | Wife | Co-Owner | Kansas |
| 7 | Robert B. Benham | 15 | Son | — | New Jersey |
| 8 | Martin M. Benham | 12 | Son | — | New Jersey |
| 9 | Margaret Adlam | 90 | Aunt | — | New Jersey |
| 10 | James L. Ulrich | 43 | Head | Economics Professor | Colorado |
| 11 | Dorothy Ulrich | 41 | Wife | — | New Jersey |
| 12 | Barbara Ulrich | 16 | Daughter | — | New Jersey |
| 13 | Leila A. Ulrich | 10 | Daughter | — | New Jersey |
| 14 | Walter Barkas | 37 | Head | Physics Professor | Oregon |
| 15 | Borghild Barkas | 29 | Wife | — | Alaska |
| 16 | Karen Barkas | 4 | Daughter | — | Washington |
| 17 | Walter Barkas | 2 | Son | — | New Jersey |
| 18 | Joseph Jonstra | 70 | Head | Gardener | Holland |
| 19 | Marie Jonstra | 50 | Wife | — | Austria |
| 20 | Wilbur J. Jonstra | 20 | Son | Musician | New Jersey |
| 21 | Irving Jr. Van Zandt | 30 | Head | Writer | New York |
| 22 | Helen Van Zandt | 30 | Wife | Writer | New York |
| 23 | Donna Leslie Van Zandt | 6 | Daughter | — | Montana |
| 24 | Peter A. Van Zandt | 4 | Son | — | New Jersey |
| 25 | William H. Macdonald THIS PERSON | 62 | Head | Mason | Scotland |
| 26 | Annie Macdonald | 64 | Wife | — | Scotland |
| 27 | David Macdonald | 23 | Son | Timekeeper Helper | New Jersey |
| 28 | Mildred Fiedler | 39 | Daughter | Secretary | New Jersey |
| 29 | Alice Macdonald | 20 | Daughter | Childs Nurse | New Jersey |
| 30 | Martha Ann Fiedler | 8 | Daughter | — | New Jersey |
| 31 | Janet Fiedler | 5 | Daughter | — | New Jersey |
| 32 | William Battiglia | 27 | Head | Modern Lang. Instructor | New Jersey |
| 33 | Marie Rose Battiglia | 30 | Wife | — | Louisiana |
| 34 | Maria Carroll | 46 | Head | Sanitary Nurse | Pennsylvania |
| 35 | Catherine Carroll | 66 | Mother | — | Pennsylvania |
| 36 | Louise Osgood | 40 | Head | English Teacher | Michigan |
| 37 | Arthur Jarvis | 61 | Head | — | Canada English |
| 38 | Vita Jarvis | 54 | Wife | — | Michigan |
| 39 | Harry Margerum | 68 | Head | Sheet Metal Worker | New Jersey |
| 40 | Lizzie B. Margerum | 66 | Wife | — | New York |
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)