JK
John Keefe — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this John Keefe across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Keefe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lawrence City |
| Est. Birth Year | ~1919 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Keefe | Son | — | 21 | ~1919 |
| James Keefe | Son | — | 25 | ~1915 |
| Margaret Keefe | Daughter | — | 27 | ~1913 |
| Alice Keefe | Spouse | — | 55 | ~1885 |
| Katherine Keefe | Daughter | — | 23 | ~1917 |
| James Keefe | Head | — | 54 | ~1886 |
| Michael Keefe | Other | — | 48 | ~1892 |
| Michael Keefe | Son | — | 20 | ~1920 |
Census Appearances
1930
Essex, Massachusetts
Son, age 11
Essex, Massachusetts · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Keefe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland Free State |
| Mother's Birthplace | Ireland Free State |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 21
Essex-County, Massachusetts · implied b. ~1919 — 8 household members
| Surname | Keefe |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Highest Grade | H 4 |
| 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 21 · b. ~1919 · Massachusetts
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Sibling
Michael Keefe
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Keefe
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Keefe
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Keefe
Sibling · 1940 · age 25
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01584-00044)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Busby | 46 | Head | Real Estate Agt | Massachusetts |
| 2 | Ann Busby | 60 | Sister | — | Massachusetts |
| 3 | Elizabeth Busby | 48 | Sister | Stenog. | Massachusetts |
| 4 | James J. Keefe | 54 | Head | Wool Sorter | England |
| 5 | Alice Keefe | 55 | Wife | — | Massachusetts |
| 6 | Margaret Keefe | 27 | Daughter | Finisher | Massachusetts |
| 7 | James Keefe | 25 | Son | Trucker | Massachusetts |
| 8 | Katherine Keefe | 23 | Daughter | Tender | Massachusetts |
| 9 | John Keefe THIS PERSON | 21 | Son | — | Massachusetts |
| 10 | Michael Keefe | 20 | Son | Back-Washer | Massachusetts |
| 11 | Michael Keefe | 48 | Brother | Trucker | Eire |
| 12 | George E. Mccolley | 75 | Head | — | Massachusetts |
| 13 | Mary Mccolley | 74 | Wife | — | England |
| 14 | Francis Garvey | 21 | Granddaughter | Mender | Massachusetts |
| 15 | Fred Keulnier | 48 | Head | Supervisor | Massachusetts |
| 16 | Helen Keulnier | 47 | Wife | — | Massachusetts |
| 17 | Martha Burton | 39 | Head | Examiner | Belgium |
| 18 | Robert Burton | 18 | Son | — | Massachusetts |
| 19 | Idonie Archie | 65 | Mother | — | Belgium |
| 20 | Kachadoor Minasian | 41 | Head | Color Mixer | Turkey |
| 21 | Agnes Minasian | 37 | Wife | — | Turkey |
| 22 | Mary Minasian | 18 | Daughter | — | Armenia |
| 23 | George Minasian | 7 | Son | — | Massachusetts |
| 24 | Annie Conley | 67 | Head | — | Eire |
| 25 | Mary Conley | 35 | Daughter | Mother'S Helper | Massachusetts |
| 26 | Maurice Mclaughlin | 58 | Head | Teacher | Massachusetts |
| 27 | Katherine Mclaughlin | 50 | Wife | — | Massachusetts |
| 28 | Maurice Mclaughlin | 19 | Son | — | Massachusetts |
| 29 | Walter Mclaughlin | 18 | Son | — | Massachusetts |
| 30 | Abbey Bateman | 48 | Head | Teacher | Massachusetts |
| 31 | Helen Holden | 50 | Head | Housework | Massachusetts |
| 32 | Charles R. Holden | 64 | Lodger | Cook | Massachusetts |
| 33 | Frank Chaisson | 31 | Head | Laborer | Maine |
| 34 | Cora Chaisson | 26 | Wife | — | Massachusetts |
| 35 | Rose Marie Chaisson | 2 | Daughter | — | Massachusetts |
| 36 | Salvatore Pulverente | 55 | Head | Salesman | Italy |
| 37 | Nunzia Pulverente | 55 | Wife | — | Italy |
| 38 | Angelina Pulverente | 15 | Daughter | — | Massachusetts |
| 39 | Millie Pulverente | 13 | Daughter | — | 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)