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Mary Watson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this Mary Watson across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1886), then head of a 5-person household.
Age 54
b. ~1886
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Watson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Princeton Borough |
| Est. Birth Year | ~1886 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Evelyn Watson | Daughter | — | 19 | ~1921 |
| Verna Watson | Daughter | — | 25 | ~1915 |
| John Watson | Head | — | 61 | ~1879 |
| Douglas Watson | Son | — | 16 | ~1924 |
| Mary Watson | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Mercer, New …
Spouse, age 35
Mercer, New Jersey · implied b. ~1885 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Watson |
| Given Name | Mary R. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Mercer, New …
Spouse, age 45
Mercer, New Jersey · implied b. ~1885 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Watson |
| Given Name | Mary S. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 20 |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Mercer-County, New …
Spouse, age 54
Mercer-County, New Jersey · implied b. ~1886 — 5 household members
| Surname | Watson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Princeton Borough |
| 1935 Residence (County) | Mercer |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Mary Watson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Watson
Spouse · 1940 · age 54 · b. ~1886 · 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-t0627-02357-00501)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dehmel | Dehmet Troof | 24 | Lodger | Instructor | Illinois |
| 42 | Heiserman Troof | 33 | Lodger | Laborer | Massachusetts |
| 43 | John Watson | 61 | Head | Delivery Man | Scotland |
| 44 | Mary Watson THIS PERSON | 54 | Wife | — | Massachusetts |
| 45 | Verna Watson | 25 | Daughter | Telephone Oper | New Jersey |
| 46 | Evelyn Watson | 19 | Daughter | — | New Jersey |
| 47 | Douglas Watson | 16 | Son | — | New Jersey |
| 48 | Axel Stollen | 59 | Head | Painter | Sweden |
| 49 | Ingrid Stollen | 59 | Wife | — | Sweden |
| 50 | Alice Stollen | 23 | Daughter | — | New Jersey |
| 51 | Lawrence Healy | 39 | Son-in-law | Barber | Virginia |
| 52 | Ann Healy | 28 | Daughter-in-law | — | New Jersey |
| 53 | Lois Healy | 7 | Granddaughter | — | New Jersey |
| 54 | David Healy | 4 | Grandson | — | New Jersey |
| 55 | Orson La Baw | 44 | Head | Store Manager | New Jersey |
| 56 | Ethel La Baw | 39 | Wife | — | New Jersey |
| 57 | Phyllis La Baw | 5 | Daughter | — | New Jersey |
| 58 | David La Baw | 4 | Son | — | New Jersey |
| 59 | Roger La Baw | 2 | Son | — | New Jersey |
| 60 | Alma Miller | 56 | Mother-in-law | — | Minnesota |
| 61 | Thomas O'Connor | 50 | Head | Bank Guard | New Jersey |
| 62 | Gertrude O'Connor | 48 | Wife | — | New Jersey |
| 63 | Eleanor O'Connor | 25 | Daughter | Secretary | New Jersey |
| 64 | Thomas Jr O'Connor | 16 | Son | — | New Jersey |
| 65 | Alan O'Connor | 14 | Son | — | New Jersey |
| 66 | Frank Smith | 50 | Head | Railroad Clerk | New Jersey |
| 67 | Betty Smith | 47 | Wife | — | Sweden |
| 68 | Henry Sieglo | 40 | Head | Manager | New York |
| 69 | Theresa Sieglo | 37 | Wife | — | New Jersey |
| 70 | Henry Jr Sieglo | 13 | Son | — | New Jersey |
| 71 | Marion Sieglo | 11 | Daughter | — | New Jersey |
| 72 | Walter Koneightad | Koneightal | 27 | Head | Landscape Architect | New Jersey |
| 73 | Anna Koneightad | Koneightal | 28 | Wife | — | New Jersey |
| 74 | Robert Koneightad | Koneightal | 3 | Son | — | New Jersey |
| 75 | Alfred Rockafellow | 39 | Head | Steamfitter Helper | New Jersey |
| 76 | Isabel Rockafellow | 37 | Wife | Clerk | New Jersey |
| 77 | Musintermes | None | — | — | — |
| 78 | Herbert Gaughan | 36 | Head | Carpenter | Ireland North |
| 79 | Wilhelmina Gaughan | 34 | Wife | — | Ireland North |
| 80 | Herbert Jr Gaughan | 15 | Son | — | Connecticut |
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)