WM
William Macdonald — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this William Macdonald across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 8-person household.
Age 17
b. ~1923
Male
Son
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | MacDonald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | Hs 2 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1923 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Margaret Macdonald | Spouse | — | 38 | ~1902 |
| Angus Macdonald | Son | — | 9 | ~1931 |
| Irene Macdonald | Daughter | — | 14 | ~1926 |
| William Macdonald | Son | — | 17 | ~1923 |
| Jean Macdonald | Daughter | — | 12 | ~1928 |
| Ramsey Macdonald | Son | — | 10 | ~1930 |
| Elizabeth Macdonald | Daughter | — | 19 | ~1921 |
| James Macdonald | Head | — | 45 | ~1895 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 7
Allegheny, Pennsylvania · implied b. ~1923 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacDonald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | Alien |
| Year of Immigration | 1924 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Allegheny-County, Pennsylvania
Son, age 17
Allegheny-County, Pennsylvania · implied b. ~1923 — 8 household members
| Surname | MacDonald |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Naturalization Status | Naturalized |
| Highest Grade | Hs 2 |
| 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.
Show:
This person
Anchor record
William Macdonald
Son · 1940 · age 17 · b. ~1923 · Pennsylvania
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Sibling
Angus Macdonald
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ramsey Macdonald
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Macdonald
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Macdonald
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Macdonald
Sibling · 1940 · age 12
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03664-00448)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Janet Francis | 9 | Daughter | — | Pennsylvania |
| 42 | William Barkley | 44 | Head | Time Keeper | Pennsylvania |
| 43 | Emma Barkley | 46 | Wife | — | Pennsylvania |
| 44 | Phillip Davies | 59 | Lodger | — | Pennsylvania |
| 45 | Elmer Boone | 25 | Head | Machinist | Pennsylvania |
| 46 | Virginia Boone | 23 | Wife | — | Pennsylvania |
| 47 | Walter Larkin | 40 | Head | Painter | Pennsylvania |
| 48 | Bertha Larkin | 38 | Wife | — | Ohio |
| 49 | William Larkin | 11 | Son | — | Pennsylvania |
| 50 | Edward J. Moran | 25 | Head | Laborer | Pennsylvania |
| 51 | Bertha Moran | 18 | Wife | — | Pennsylvania |
| 52 | Edwin Collins | 64 | Head | Laborer | Pennsylvania |
| 53 | Kathryn Collins | 59 | Wife | — | Pennsylvania |
| 54 | Russell Collins | 28 | Son | Laborer | Pennsylvania |
| 55 | Oliver Collins | 26 | Son | Laborer | Pennsylvania |
| 56 | Earl Collins | 23 | Son | Attendant | Pennsylvania |
| 57 | Arthur Collins | 20 | Son | Laborer | Pennsylvania |
| 58 | Clyde Collins | 16 | Son | — | Pennsylvania |
| 59 | Oliver Todd | 64 | Head | Brick-Layer | Pennsylvania |
| 60 | Mary Todd | 59 | Wife | — | England |
| 61 | Aida Todd | 22 | Daughter | Maid | Pennsylvania |
| 62 | Melvin Shook | 29 | Head | Clerk | Pennsylvania |
| 63 | Florence Shook | 29 | Wife | — | Pennsylvania |
| 64 | Norman Shook | 8 | Son | — | Pennsylvania |
| 65 | Robert Shook | 5 | Son | — | Pennsylvania |
| 66 | Paul Shook | 1 | Son | — | Pennsylvania |
| 67 | James Macdonald | 45 | Head | Stationary Engineer | Scotland |
| 68 | Margaret Macdonald | 38 | Wife | — | Scotland |
| 69 | Elizabeth Macdonald | 19 | Daughter | File Clerk | Scotland |
| 70 | William Macdonald THIS PERSON | 17 | Son | — | Scotland |
| 71 | Irene Macdonald | 14 | Daughter | — | Pennsylvania |
| 72 | Jean Macdonald | 12 | Daughter | — | Pennsylvania |
| 73 | Ramsey Macdonald | 10 | Son | — | Pennsylvania |
| 74 | Angus Macdonald | 9 | Son | — | Pennsylvania |
| 75 | John Dejidas | 31 | Head | Clerk | Pennsylvania |
| 76 | Emma Dejidas | 22 | Wife | — | Pennsylvania |
| 77 | A. Elizabeth Dejidas | 4 | Daughter | — | Pennsylvania |
| 78 | Shirley M. Dejidas | 0 | Daughter | — | Pennsylvania |
| 79 | Edwin Jr. Collins | 31 | Head | Millwright | Pennsylvania |
| 80 | Isabelle Collins | 26 | Wife | — | Pennsylvania |
Related Census Records
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)