JK
John Keefe — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Keefe across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1908), then head of a 6-person household.
Age 32
b. ~1908
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Keefe |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Clerk |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerk |
| Township / Ward | Somerville |
| Est. Birth Year | ~1908 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Michael Keefe | Head | — | 71 | ~1869 |
| James Keefe | Son | — | 32 | ~1908 |
| Arthur Keefe | Son | — | 30 | ~1910 |
| Nora Keefe | Spouse | — | 67 | ~1873 |
| Joseph Keefe | Son | — | 25 | ~1915 |
| John Keefe | Son | — | 32 | ~1908 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 21
Middlesex, Massachusetts · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Keefe |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Salesman |
| Industry | Laundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 32
Middlesex-County, Massachusetts · implied b. ~1908 — 6 household members
| Surname | Keefe |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Occupation | Clerk |
| Industry | Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | C 1 |
| 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 John Keefe across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Keefe
Son · 1940 · age 32 · b. ~1908 · Massachusetts
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Sibling
Arthur Keefe
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Keefe
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Keefe
Sibling · 1940 · age 32
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
40 people indexed on this census page (nara:1940:m-t0627-01704-00042)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rose Mucci | 24 | Daughter | — | Massachusetts |
| 2 | Joseph Gallozzi | 50 | Head | Head Servicer | Italy |
| 3 | Ada Gallozzi | 40 | Wife | — | Italy |
| 4 | Gustavo Gallozzi | 20 | Son | Laborer | Massachusetts |
| 5 | Ferdinand Gallozzi | 19 | Son | New Worker | Massachusetts |
| 6 | Edmund Gallozzi | 16 | Son | — | Massachusetts |
| 7 | Elizabeth Ferris | 61 | Head | Seamstress | Massachusetts |
| 8 | Vera E. Shirley | 66 | Lodger | — | Massachusetts |
| 9 | Arthur E. Rockwood | 48 | Head | Warehouseman | Massachusetts |
| 10 | Blanche E. Rockwood | 47 | Wife | — | Massachusetts |
| 11 | Eleanor G. Rockwood | 20 | Daughter | — | Massachusetts |
| 12 | Eugene J. Rockwood | 17 | Son | — | Massachusetts |
| 13 | Lillian B. Rockwood | 14 | Daughter | — | Massachusetts |
| 14 | Jeannette Rockwood | 11 | Daughter | — | Massachusetts |
| 15 | Gerald Rockwood | 9 | Son | — | Massachusetts |
| 16 | George F. Desorme | 74 | Head | — | Massachusetts |
| 17 | Emma Desorme | 63 | Wife | — | Massachusetts |
| 18 | Mary J. Doherty | 53 | Head | — | Northern Ireland |
| 19 | Philip Pescatore | 27 | Son in law | Bookkeeper | Massachusetts |
| 20 | Mary J. Pescatore | 26 | Daughter | — | Massachusetts |
| 21 | Frances F. Pescatore | 2 | Granddaughter | — | Massachusetts |
| 22 | Ruth M. Dolan | 22 | Niece | — | Massachusetts |
| 23 | Michael Keefe | 71 | Head | — | Eire |
| 24 | Nora H. Keefe | 67 | Wife | — | Eire |
| 25 | John J. Keefe THIS PERSON | 32 | Son | Clerk | Massachusetts |
| 26 | James E. Keefe | 32 | Son | Teacher | Massachusetts |
| 27 | Arthur M. Keefe | 30 | Son | Geologist | Massachusetts |
| 28 | Joseph V. Keefe | 25 | Son | New Worker | Massachusetts |
| 29 | Betley Small | 47 | Head | Foreman | Eire |
| 30 | Catherine C. Small | 47 | Wife | — | Eire |
| 31 | Thomas Small | 13 | Son | — | Massachusetts |
| 32 | James Small | 10 | Son | — | Massachusetts |
| 33 | Patricia Small | 9 | Daughter | — | Massachusetts |
| 34 | Peter Mccoy | 31 | Head | Section Foreman | Eire |
| 35 | Mary Mccoy | 26 | Wife | — | Northern Ireland |
| 36 | Mary E. Mccoy | 1 | Daughter | — | Massachusetts |
| 37 | Alice Mccoy | 3 | Daughter | — | Massachusetts |
| 38 | John L. Connelly | 40 | Head | Printer | Massachusetts |
| 39 | Anna Connelly | 40 | Wife | — | Massachusetts |
| 40 | John Connelly | 16 | Son | — | 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)