MK
Mary Keefe — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Keefe across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Keefe |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Middlesex |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Assorter |
| Industry | Cookie Factory |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 496 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Assorter |
| Est. Birth Year | ~1918 |
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 |
|---|---|---|---|---|
| Julia Keefe | Spouse | — | 53 | ~1887 |
| John Keefe | Head | — | 65 | ~1875 |
| Raymond Keefe | Son | — | 16 | ~1924 |
| Mary Keefe | Daughter | — | 22 | ~1918 |
| Anna Keefe | Daughter | — | 20 | ~1920 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 12
Middlesex, Massachusetts · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Keefe |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 22
Middlesex-County, Massachusetts · implied b. ~1918 — 5 household members
| Surname | Keefe |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Middlesex |
| 1935 Residence (County) | Middlesex |
| Occupation | Assorter |
| Industry | Cookie Factory |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 496 |
| Highest Grade | No 8 |
| 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 Keefe across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Keefe
Daughter · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Raymond Keefe
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Keefe
Sibling · 1940 · age 20
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01694-00220)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ralph Hise | 22 | Head | Shipper | Massachusetts |
| 42 | Anna Hise | 20 | Wife | — | Massachusetts |
| 43 | Donna Hise | 1 | Daughter | — | Massachusetts |
| 44 | Anna Chisholm | 44 | Head | Maid | Eire |
| 45 | John Chisholm | 12 | Son | — | Massachusetts |
| 46 | Thomas Chisholm | 10 | Son | — | Massachusetts |
| 47 | Anthony Desrosier | 49 | Head | Odd Jobs | Massachusetts |
| 48 | Oneta Desrosier | 36 | Wife | — | Canada-French |
| 49 | Delores Desrosier | 10 | Daughter | — | Massachusetts |
| 50 | Diane Desrosier | 5 | Daughter | — | Massachusetts |
| 51 | Wallace A. Raymond | 17 | Stepson | Laborer | Massachusetts |
| 52 | William Raymond | 16 | Stepson | — | Massachusetts |
| 53 | Mildred Adams | 34 | Head | — | Massachusetts |
| 54 | Virginia Adams | 10 | Daughter | — | Massachusetts |
| 55 | Janet Adams | 7 | Daughter | — | Massachusetts |
| 56 | John Adams | 4 | Son | — | Massachusetts |
| 58 | Lucien St. Jean | 35 | Head | Naumkeag | Massachusetts |
| 59 | Genevieve St. Jean | 24 | Wife | Waitress | Massachusetts |
| 60 | Loretta St. Jean | 2 | Daughter | — | Massachusetts |
| 61 | John Keefe | 65 | Head | Laborer | Massachusetts |
| 62 | Julia Keefe | 53 | Wife | — | Eire |
| 63 | Mary Keefe THIS PERSON | 22 | Daughter | Assorter | Massachusetts |
| 64 | Anna Keefe | 20 | Daughter | New Worker | Massachusetts |
| 65 | Raymond Keefe | 16 | Son | New Worker | Massachusetts |
| 66 | Anna Welch | 33 | Head | Typist | Massachusetts |
| 67 | Arlene Welch | 15 | Daughter | — | Massachusetts |
| 68 | Arthur Welch | 10 | Son | — | Massachusetts |
| 69 | Robert Welch | 8 | Son | — | Massachusetts |
| 70 | Donald Welch | 6 | Son | — | Massachusetts |
| 71 | Catherine Tarosz | 69 | Head | — | Poland |
| 72 | Joseph Tarosz | 31 | Son | Laborer | Massachusetts |
| 73 | Mary Bigos | 33 | Daughter | — | Massachusetts |
| 74 | Walter Bigos | 10 | Grandson | — | Massachusetts |
| 75 | Mary Kozera | 50 | Head | — | Poland |
| 76 | Paul Kotceri | 70 | Cousin | Farm Laborer | Poland |
| 77 | John Jezak | 66 | Head | — | Poland |
| 78 | Catherine Jezak | 65 | Wife | — | Poland |
| 79 | Dorothy Jezak | 4 | Granddaughter | — | Massachusetts |
| 80 | William Roper | 53 | Head | Filling Station Man | Massachusetts |
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)