WD
William Duncan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this William Duncan across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1868), then head of a 4-person household.
Age 72
b. ~1868
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Duncan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | Boston City |
| Est. Birth Year | ~1868 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Duncan | Head | — | 72 | ~1868 |
| Robert Duncan | Son | — | 22 | ~1918 |
| William Duncan | Son | — | 37 | ~1903 |
| Ellen Duncan | Spouse | — | 63 | ~1877 |
Census Appearances
1920
Norfolk, Massachusetts
Head, age 51
Norfolk, Massachusetts · implied b. ~1869 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1885 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Farmer |
| Industry | Estate |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Scotland |
| Year of Naturalization | 1891 |
| Birthplace (normalized) | scotland |
1930
Norfolk, Massachusetts
Head, age 62
Norfolk, Massachusetts · implied b. ~1868 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duncan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1872 |
| Age at First Marriage | 21 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Plumber |
| Industry | Building Trades |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 55 |
| Radio Set | R |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Suffolk-County, Massachusetts
Head, age 72
Suffolk-County, Massachusetts · implied b. ~1868 — 4 household members
| Surname | Duncan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 72 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 7 |
| 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 Duncan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Duncan
Head · 1940 · age 72 · b. ~1868 · Massachusetts
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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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01675-00034)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Calvin J. Hood | 13 | Son | — | Massachusetts |
| 2 | Loraine M. Hood | 10 | Daughter | — | Massachusetts |
| 3 | James D. Fitzgerald | 35 | Head | Welder | Massachusetts |
| 4 | Margaret Q. Fitzgerald | 35 | Wife | Telephone Operator | Massachusetts |
| 5 | Mary E. O'Brien | 62 | Mother-in-law | — | Massachusetts |
| 6 | William S. O'Brien | 22 | Brother-in-law | Chauffeur | Massachusetts |
| 7 | Donald D. Hill | 50 | Head | Carpenter | Canada English |
| 8 | James J. Hill | 23 | Son | Grocery Manager | Canada English |
| 9 | Frederick J. Hill | 21 | Son | Clerk | Canada English |
| 10 | Douglas A. Hill | 19 | Son | New Worker | Canada English |
| 11 | Harvey S. Wolcott | 56 | Head | Machinist | Massachusetts |
| 12 | Mary E. Wolcott | 46 | Wife | Housekeeper | Massachusetts |
| 13 | Harvey B. Wolcott | 18 | Son | — | Massachusetts |
| 14 | June M. Wolcott | 14 | Daughter | — | Massachusetts |
| 15 | Ralph Radcliffe | 54 | Roomer | Machinist | England |
| 16 | William Duncan THIS PERSON | 72 | Head | — | Scotland |
| 17 | Ellen B. Duncan | 63 | Wife | — | England |
| 18 | William Jr. Duncan | 37 | Son | Senior Clerk | Massachusetts |
| 19 | Robert J. Duncan | 22 | Son | Stock Clerk | Massachusetts |
| 20 | Frederick Pearson | 47 | Head | Bank Teller | Canada English |
| 21 | Nora M. Pearson | 47 | Wife | — | Massachusetts |
| 22 | Doris V. Pearson | 16 | Daughter | — | Massachusetts |
| 23 | Frederick J. Pearson | 12 | Son | — | Massachusetts |
| 24 | William R. Pearson | 6 | Son | — | Massachusetts |
| 25 | Morris King | 47 | Head | Chauffeur | New Hampshire |
| 26 | Mary A. King | 45 | Wife | — | Massachusetts |
| 27 | Edward King | 15 | Son | — | Massachusetts |
| 28 | Marion King | 15 | Daughter | — | Massachusetts |
| 29 | John A. Macphail | 49 | Head | Stationary Engineer | Nova Scotia |
| 30 | Marion Macphail | 45 | Wife | — | Massachusetts |
| 31 | Catherine Macphail | 13 | Dau | — | Massachusetts |
| 32 | Evelyn Macphail | 11 | Dau | — | Massachusetts |
| 33 | Mildred Macphail | 10 | Dau | — | Massachusetts |
| 34 | Guilford Macphail | 7 | Son | — | Massachusetts |
| 35 | Daniel J. Rehilly | 38 | Head | Bar Tender | Massachusetts |
| 36 | Catherine Rehilly | 33 | Wife | Saleslady | Massachusetts |
| 37 | Maria Rehilly | 5 | Dau | — | Massachusetts |
| 38 | June A. Rehilly | 7 | Dau | — | Massachusetts |
| 39 | Jeremiah Rehilly | 5 | Son | — | Massachusetts |
| 40 | Mary E. Murphy | 73 | Mother-in-law | — | Ireland (Eire) |
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)