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Mary Leary — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Leary across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 5-person household.
Age 14
b. ~1926
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Leary |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H-8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Malden City |
| Est. Birth Year | ~1926 |
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 |
|---|---|---|---|---|
| Barbara Leary | Daughter | — | 12 | ~1928 |
| Joseph Leary | Son | — | 17 | ~1923 |
| Winifred Leary | Daughter | — | 18 | ~1922 |
| Michael Leary | Head | — | 48 | ~1892 |
| Mary Leary | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 4
Middlesex, Massachusetts · implied b. ~1926 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leary |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 14
Middlesex-County, Massachusetts · implied b. ~1926 — 5 household members
| Surname | Leary |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Industry | 0 |
| Highest Grade | H-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 Leary across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Leary
Daughter · 1940 · age 14 · b. ~1926 · Massachusetts
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Sibling
Winifred Leary
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Leary
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Leary
Sibling · 1940 · age 17
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-t0627-01608-00075)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank H. Chesley | 27 | Head | Ledger Clerk | Massachusetts |
| 2 | Henry Chesley | 0 | Son | — | Massachusetts |
| 3 | Gennaro Funicella | 50 | Head | Trackman | Italy |
| 4 | Marie Funicella | 44 | Wife | — | Italy |
| 5 | Serafino Funicella | 19 | Son | New Worker | Massachusetts |
| 6 | Anthony Funicella | 18 | Son | Paper Boy | Massachusetts |
| 7 | Helen Funicella | 15 | Daughter | — | Massachusetts |
| 8 | Susanna Funicella | 10 | Daughter | — | Massachusetts |
| 9 | Mary Flanagan | 16 | Head | — | Massachusetts |
| 10 | Ellen M. Johnson | 5 | Head | — | Finland |
| 11 | William Davidson | 40 | Head | Pick Up Driver | Massachusetts |
| 12 | Laura Davidson | 38 | Wife | — | Massachusetts |
| 13 | William Davidson | 19 | Son | Clerk, Sales | Massachusetts |
| 14 | Mildred Davidson | 17 | Daughter | — | Massachusetts |
| 15 | Robert Davidson | 15 | Son | — | Massachusetts |
| 16 | George Davidson | 14 | Son | — | Massachusetts |
| 17 | John Davidson | 11 | Son | — | Massachusetts |
| 18 | Richard Davidson | 10 | Son | — | Massachusetts |
| 19 | Edward Davidson | 9 | Son | — | Massachusetts |
| 20 | Joseph Davidson | 6 | Son | — | Massachusetts |
| 21 | Charles Davidson | 5 | Son | — | Massachusetts |
| 22 | Louise Davidson | 1 | Daughter | — | Massachusetts |
| 23 | Gaetano Volpe | 41 | Head | Laborer | Italy |
| 24 | Margaret Volpe | 45 | Wife | — | Massachusetts |
| 25 | Anthony Volpe | 23 | Son | Steel Worker | Massachusetts |
| 26 | Marie Volpe | 17 | Daughter | — | D.C. |
| 27 | Mary Nugent | 51 | Head | Seamstress | Eire |
| 28 | John Nugent | 23 | Son | Packer | Massachusetts |
| 29 | Richard Nugent | 21 | Son | Tire Repairer | Massachusetts |
| 30 | Francis Nugent | 20 | Son | Cutter | Massachusetts |
| 31 | Dorothy Nugent | 16 | Daughter | — | Massachusetts |
| 32 | Michael Leary | 48 | Head | Laborer Warehouseman | Massachusetts |
| 33 | Winifred Leary | 18 | Daughter | — | Massachusetts |
| 34 | Joseph Leary | 17 | Son | — | Massachusetts |
| 35 | Mary Leary THIS PERSON | 14 | Daughter | — | Massachusetts |
| 36 | Barbara Leary | 12 | Daughter | — | Massachusetts |
| 38 | Thomas Morrow | 61 | Head | — | Northern Ireland |
| 39 | Elizabeth Morrow | 54 | Wife | — | Eire |
| 40 | Thomas H. Elliott | 35 | Head | Cooper | Eire |
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)