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John Leary — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Leary across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 9-person household.
Age 55
b. ~1885
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Leary |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | fireman |
| Industry | fire dept |
| Class of Worker | GW |
| Hours Worked | 56 |
| Income (1939) | 2100 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Fireman |
| Township / Ward | Boston |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Thomas Leary | Son | — | 23 | ~1917 |
| Leo Leary | Son | — | 14 | ~1926 |
| Catherine Leary | Spouse | — | 52 | ~1888 |
| Robert Leary | Son | — | 20 | ~1920 |
| John Leary | Head | — | 55 | ~1885 |
| Richard Leary | Son | — | 19 | ~1921 |
| Gertrude Leary | Daughter | — | 13 | ~1927 |
| Catherine Leary | Daughter | — | 15 | ~1925 |
| Joseph Leary | Son | — | 7 | ~1933 |
Census Appearances
1930
Suffolk, Massachusetts
Head, age 44
Suffolk, Massachusetts · implied b. ~1886 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leary |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 22 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Starter |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 32.00 |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Head, age 55
Suffolk-County, Massachusetts · implied b. ~1885 — 9 household members
| Surname | Leary |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | fireman |
| Industry | fire dept |
| Class of Worker | GW |
| Hours Worked | 56 |
| Income (1939) | 2100 |
| Highest Grade | H-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 Leary across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Leary
Head · 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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01676-00090)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patrick J. Curley | 58 | Head | Clerk | Eire |
| 2 | Catherine A. Curley | 52 | Wife | — | Eire |
| 3 | Catherine T. Curley | 30 | Daughter | — | Massachusetts |
| 4 | Joseph G. Curley | 28 | Son | Clerk | Massachusetts |
| 5 | John Curley | 23 | Son | Clerk | Massachusetts |
| 6 | Frederick Curley | 20 | Son | Laborer Service | Massachusetts |
| 7 | James Curley | 18 | Son | Retail Clerk | Massachusetts |
| 8 | Walter Curley | 16 | Son | — | Massachusetts |
| 9 | John J. Leary THIS PERSON | 55 | Head | Fireman | Massachusetts |
| 10 | Catherine B. Leary | 52 | Wife | — | Massachusetts |
| 11 | Thomas J. Leary | 23 | Son | Shoe Finisher | Massachusetts |
| 12 | Robert A. Leary | 20 | Son | Loft Assist Helper | Massachusetts |
| 13 | Richard G. Leary | 19 | Son | New Worker | Massachusetts |
| 14 | Catherine D. Leary | 15 | Daughter | — | Massachusetts |
| 15 | Leo N. Leary | 14 | Son | — | Massachusetts |
| 16 | Gertrude D. Leary | 13 | Daughter | — | Massachusetts |
| 17 | Joseph H. Leary | 7 | Son | — | Massachusetts |
| 18 | Robert D. Macleod | 43 | Head | Policeman | Massachusetts |
| 19 | Alvene D. Macleod | 45 | Wife | — | New York |
| 20 | Ends Block 15 And Begins Block 16 Ames | None | — | — | — |
| 21 | William J. Bunker | 39 | Head | Night Bell Boy | Massachusetts |
| 22 | Marian Bunker | 37 | Wife | — | Massachusetts |
| 23 | Marian Bunker | 3 | Daughter | — | Massachusetts |
| 24 | William J. Bunker | 1 | Son | — | Massachusetts |
| 25 | Hugo R. Nygren | 56 | Head | House Painter | Finland |
| 26 | Olga @ Nygren | 56 | Wife | — | Finland |
| 27 | Ella @ Shekante | 58 | Head | — | Massachusetts |
| 28 | Eva M. Shekante | 20 | Daughter | Plate Cutter | Massachusetts |
| 29 | Meyer Marcus | 45 | Head | Tailor | Russia |
| 30 | Esther @ Marcus | 43 | Wife | — | Massachusetts |
| 31 | Genevieve Marcus | 18 | Daughter | — | Massachusetts |
| 32 | Stanley Marcus | 11 | Son | — | Massachusetts |
| 33 | John @ Atkinson | 37 | Head | Warehouseman | England |
| 34 | Sonia Atkinson | 34 | Wife | Cost Clerk | Massachusetts |
| 35 | Leo @ Meyers | 55 | Head | Night Watchman | New York |
| 36 | Edith Meyers | 55 | Wife | — | Massachusetts |
| 37 | Patrick @ Walsh | 48 | Head | Laborer | Eire |
| 38 | Margaret Walsh | 48 | Wife | — | England |
| 39 | Matthew Walsh | 12 | Son | — | Massachusetts |
| 40 | Leo Walsh | 10 | 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)