MS
Mary Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Smith across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & Agnes — first a daughter (b.~1870), then head of a 3-person household.
Age 70
b. ~1870
Female
Daughter
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Smith |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Dracut |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Mender |
| Industry | Tailor Shop |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 452 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Mender |
| Township / Ward | Dracut |
| Est. Birth Year | ~1870 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Smith | Daughter | — | 70 | ~1870 |
| John Smith | Head | — | 84 | ~1856 |
| Agnes Smith | Spouse | — | 80 | ~1860 |
Census Appearances
1920
Middlesex, Massachusetts
Spouse, age 50
Middlesex, Massachusetts · implied b. ~1870 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1890 |
| Naturalization Status | Alien |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Middlesex, Massachusetts
Spouse, age 61
Middlesex, Massachusetts · implied b. ~1869 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1891 |
| Age at First Marriage | 22 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Middlesex-County, Massachusetts
Daughter, age 70
Middlesex-County, Massachusetts · implied b. ~1870 — 3 household members
| Surname | Smith |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Dracut |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Occupation | Mender |
| Industry | Tailor Shop |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 452 |
| Highest Grade | No 8 |
| 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 Mary Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Smith (~0.92 confidence) and mother Agnes Smith (~0.60 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.76
Father
John Smith
b. ~1856
Source father
● Household
· direct · ~0.92
Mother
Agnes Smith
b. ~1860
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Mary Smith
Daughter · 1940 · age 70 · b. ~1870 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01603-01155)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Herminie Grondine | 54 | Head | — | Canada French |
| 2 | Dorothy Grondine | 22 | Daughter | Teacher | Massachusetts |
| 3 | Alfred Grondine | 17 | Son | — | Massachusetts |
| 4 | Leo Garneau | 22 | Head | Clerk | Massachusetts |
| 5 | Anna Garneau | 20 | Wife | — | Massachusetts |
| 6 | Elmer E. Seamans | 44 | Head | Cattle Buyer | New York |
| 7 | Lorena S. Seamans | 42 | Wife | — | Canada English |
| 8 | Alan E. Seamans | 15 | Son | — | New Hampshire |
| 9 | Myrtle S. Seamans | 14 | Daughter | — | Massachusetts |
| 10 | Lorna M. Seamans | 11 | Daughter | — | Massachusetts |
| 11 | John J. O'Keefe | 51 | Head | Driver | Massachusetts |
| 12 | Marie O'Keefe | 52 | Wife | — | Massachusetts |
| 13 | John Jr. O'Keefe | 14 | Son | — | Massachusetts |
| 14 | Thomas O'Keefe | 10 | Son | — | Massachusetts |
| 15 | Raymond Keefe | 28 | Head | Rope Maker | Massachusetts |
| 16 | Florence Keefe | 25 | Wife | — | Massachusetts |
| 17 | Marietta C. Keefe | 3 | Daughter | — | Massachusetts |
| 18 | Kathleen Keefe | 1 | Daughter | — | Massachusetts |
| 19 | George Keefe | 68 | Uncle | Salesman | Massachusetts |
| 20 | — | None | — | — | — |
| 21 | Paul Merrill | 49 | Head | General Work | Massachusetts |
| 22 | Bridget Merrill | 52 | Wife | Warper | Nova Scotia |
| 23 | Raymond Merrill | 20 | Son | Comber | Massachusetts |
| 24 | Francis Merrill | 17 | Son | — | Massachusetts |
| 25 | Fred Lessieur | 25 | Head | Salesman | New Hampshire |
| 26 | Blanche Lessieur | 23 | Wife | — | New Hampshire |
| 27 | June Lessieur | 2 | Daughter | — | New Hampshire |
| 28 | Janice Lessieur | 1 | Daughter | — | Massachusetts |
| 29 | Ingram Bennett | 72 | Head | Carpenter | Nova Scotia |
| 30 | Fred Bennett | 50 | Son | Electrician | Massachusetts |
| 31 | Herbert Nichols | 44 | Head | Weaver | Massachusetts |
| 32 | Hilda Nichols | 31 | Wife | — | Massachusetts |
| 33 | Ronald Nichols | 0 | Son | — | Massachusetts |
| 34 | Victoria Pudov | 57 | Head | — | Poland |
| 35 | Chester Hollis | 26 | Son | Elevator Operator | Massachusetts |
| 36 | Helen Hollis | 31 | Daughter | Cook | Massachusetts |
| 37 | John W. Smith | 84 | Head | — | England |
| 38 | Agnes Smith | 80 | Wife | — | Scotland |
| 39 | Mary Smith THIS PERSON | 70 | Daughter | Mender | Scotland |
| 40 | — | None | — | — | — |
Pedigree Summary
Mary
Gen 1 · 2 parents
~0.76
Max depth 4 (1900–1950 window)
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)