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Mary Mcnulty — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this Mary Mcnulty across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | McNulty |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lawrence City |
| Est. Birth Year | ~1930 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcnulty | Daughter | — | 10 | ~1930 |
| Claire Mcnulty | Daughter | — | 13 | ~1927 |
| Marguerite Mcnulty | Head | — | 36 | ~1904 |
| Barbara Mcnulty | Daughter | — | 4 | ~1936 |
| Patricia Mcnulty | Daughter | — | 1 | ~1939 |
| Eileen Mcnulty | Daughter | — | 16 | ~1924 |
| Joan Mcnulty | Daughter | — | 5 | ~1935 |
| Francis Mcnulty | Son | — | 7 | ~1933 |
Census Appearances
1930
Essex, Massachusetts
Daughter, age
Essex, Massachusetts · implied b. ~1930 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNulty |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Daughter, age 10
Essex-County, Massachusetts · implied b. ~1930 — 8 household members
| Surname | McNulty |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Highest Grade | 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 Mary Mcnulty across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcnulty
Daughter · 1940 · age 10 · b. ~1930 · Massachusetts
★ You are viewing this record
Sibling
Eileen Mcnulty
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Mcnulty
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Mcnulty
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mcnulty
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Claire Mcnulty
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Mcnulty
Sibling · 1940 · age 4
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
40 people indexed on this census page (nara:1940:m-t0627-01583-00853)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Grace Conlon | 34 | Wife | — | Massachusetts |
| 2 | Marguerite Mcnulty | 36 | Head | — | Massachusetts |
| 3 | Eileen Mcnulty | 16 | Daughter | — | Massachusetts |
| 4 | Claire Mcnulty | 13 | Daughter | — | Massachusetts |
| 5 | Mary Mcnulty THIS PERSON | 10 | Daughter | — | Massachusetts |
| 6 | Francis Mcnulty | 7 | Son | — | Massachusetts |
| 7 | Joan Mcnulty | 5 | Daughter | — | Massachusetts |
| 8 | Barbara Mcnulty | 4 | Daughter | — | Massachusetts |
| 9 | Patricia Mcnulty | 1 | Daughter | — | Massachusetts |
| 10 | Sarah Frank | 65 | Head | — | Russia |
| 11 | Alan Frank | 42 | Son | Salesman | Massachusetts |
| 12 | Sadie Frank | 37 | Daughter | Salesgirl | Massachusetts |
| 13 | James Kolofolous | 47 | Head | Laborer | Greece |
| 14 | Jean Kolofolous | 45 | Wife | — | Greece |
| 15 | Helen Kolofolous | 17 | Daughter | — | Massachusetts |
| 16 | George Kolofolous | 13 | Son | — | Massachusetts |
| 17 | Michael Kolofolous | 11 | Son | — | Massachusetts |
| 18 | Charles Kolofolous | 5 | Son | — | Massachusetts |
| 19 | Nicholas Kolofolous | 3 | Son | — | Massachusetts |
| 20 | Jack Pasternak | 57 | Head | Merchant | Russia |
| 21 | Sarah Pasternak | 50 | Wife | — | Russia |
| 22 | Albert Pasternak | 14 | Son | — | Massachusetts |
| 23 | Clement Rondeau | 57 | Head | Carpenter | Canada French |
| 24 | Mary Ann Rondeau | 53 | Wife | — | Canada French |
| 25 | Gabrielle La Mothe | 31 | Daughter | Inspector | Massachusetts |
| 26 | Rosarie La Mothe | 26 | Daughter-in-law | Advisor | Massachusetts |
| 27 | Lucille La Mothe | 23 | Daughter-in-law | Salesgirl | Massachusetts |
| 28 | Adelard O'Brien | 54 | Head | Weaver | Canada French |
| 29 | Mamie O'Brien | 50 | Wife | — | Canada French |
| 30 | Raoul O'Brien | 27 | Son | Weaver | New Hampshire |
| 31 | Armand O'Brien | 22 | Son | Weaver | Massachusetts |
| 32 | Claude Langlois | 36 | Head | Loomfixer | Maine |
| 33 | Marie B. Langlois | 32 | Wife | Weaver | Canada French |
| 34 | Claude Jr. Langlois | 4 | Son | — | Massachusetts |
| 35 | Arthur Cormier | 57 | Head | Carpenter | Maine |
| 36 | Mary Cormier | 57 | Wife | — | Maine |
| 37 | Laurene Cormier | 21 | Son | — | Maine |
| 38 | Rita Cormier | 17 | Daughter | — | New Hampshire |
| 39 | Irene Cormier | 14 | Daughter | — | Massachusetts |
| 40 | David Barenboim | 52 | Head | Laborer | Russia |
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)