MP
Mary Perry — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Perry across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1885), then head of a 7-person household.
Age 55
b. ~1885
Female
Spouse
Born: Portugal
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Perry |
| Given Name | Mary J. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Portugal |
| 1935 Residence (City) | Lowell |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | First papers filed |
| Additional Details | |
| Industry | 0 |
| Highest Grade | G-4 |
| 1935 Residence | Same Place |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
| Township / Ward | Lowell |
| Est. Birth Year | ~1885 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Henrietta Perry | Daughter | — | 14 | ~1926 |
| Florence Perry | Daughter | — | 19 | ~1921 |
| Sadie Perry | Daughter | — | 15 | ~1925 |
| Manuel Perry | Head | — | 58 | ~1882 |
| Anthony Perry | Son | — | 25 | ~1915 |
| John Perry | Son | — | 20 | ~1920 |
| Mary Perry | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Middlesex, Massachusetts
Spouse, age 33
Middlesex, Massachusetts · implied b. ~1887 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Perry |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Portugal |
| Year of Immigration | 1904 |
| Naturalization Status | Alien |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1930
Middlesex, Massachusetts
Spouse, age 44
Middlesex, Massachusetts · implied b. ~1886 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Perry |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Portugal |
| Naturalization Status | Alien |
| Year of Immigration | 1903 |
| Age at First Marriage | 20 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1940
Middlesex-County, Massachusetts
Spouse, age 55
Middlesex-County, Massachusetts · implied b. ~1885 — 7 household members
| Surname | Perry |
| Given Name | Mary J. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Portugal |
| 1935 Residence (City) | Lowell |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | First papers filed |
| Industry | 0 |
| Highest Grade | G-4 |
| 1935 Residence | Same Place |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
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 Perry across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Perry
Spouse · 1940 · age 55 · b. ~1885 · 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 — 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-t0627-01694-00550)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Rogers | 38 | Head | Painter | Massachusetts |
| 42 | Katherine Rogers | 36 | Wife | — | Massachusetts |
| 43 | Jane Rogers | 12 | Daughter | — | Massachusetts |
| 44 | Johanna B. Patterson | 80 | Head | — | Massachusetts |
| 45 | John Patterson | 70 | Brother | — | Massachusetts |
| 46 | John Solomans | 65 | Head | Tailor | Sweden |
| 47 | Matilda S. Solomans | 64 | Wife | — | Sweden |
| 48 | Ethel Solomans | 26 | Daughter | Time Clerk | Massachusetts |
| 49 | Arthur Solomans | 24 | Son | Office Boy | Massachusetts |
| 50 | Thomas G. Holey | 32 | Head | Instructor | Massachusetts |
| 51 | Ethel Holey | 31 | Wife | — | Massachusetts |
| 52 | Patricia Holey | 13 | Daughter | — | Massachusetts |
| 53 | Richard Holey | 3 | Son | — | Massachusetts |
| 54 | Kevin Holey | 1 | Son | — | Massachusetts |
| 55 | Noah P. Finnegan | 63 | Head | Laborer | Ireland |
| 56 | Noah P. Finnegan | 15 | Daughter | Typist | Massachusetts |
| 57 | Joseph Finnegan | 33 | Son | Fireman | Massachusetts |
| 58 | William Carroll | 34 | Head | Supervisor Clerk | Massachusetts |
| 59 | Gladys S. Carroll | 32 | Wife | — | Massachusetts |
| 60 | Lorraine Carroll | 12 | Daughter | — | Massachusetts |
| 61 | Mona Carroll | 7 | Daughter | — | Massachusetts |
| 62 | Margaret Mccaffrey | 72 | Head | — | Massachusetts |
| 63 | Leo M. Mccaffrey | 43 | Son | Soda Clerk | Massachusetts |
| 64 | Leo M. Jr. Mccaffrey | 12 | Grandson | — | Massachusetts |
| 65 | Edward J. Walsh | 57 | Head | Maintenance | Virginia |
| 66 | Barbara Walsh | 15 | Daughter | — | Massachusetts |
| 67 | Manuel Perry | 58 | Head | Packer | Portugal |
| 68 | Mary J. Perry THIS PERSON | 55 | Wife | — | Portugal |
| 69 | Anthony Perry | 25 | Son | Master | Massachusetts |
| 70 | John Perry | 20 | Son | Office Boy | Massachusetts |
| 71 | Florence Perry | 19 | Daughter | Packer | Massachusetts |
| 72 | Sadie Perry | 15 | Daughter | Weigher | Massachusetts |
| 73 | Henrietta Perry | 14 | Daughter | — | Massachusetts |
| 74 | Joseph F. Ryan | 32 | Head | Laborer | Massachusetts |
| 75 | Alice Ryan | 33 | Wife | Operator | Massachusetts |
| 76 | Mary Ryan | 10 | Daughter | — | Massachusetts |
| 77 | Louise Ryan | 8 | Daughter | — | Massachusetts |
| 78 | Joseph Ryan | 5 | Son | — | Massachusetts |
| 79 | Elizabeth Connor | 74 | Head | — | Ireland |
| 80 | Charles Connor | 33 | Son | Laborer | Massachusetts |
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)