JM
John Mcnulty — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Mcnulty across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1913), then head of a 10-person household.
Age 27
b. ~1913
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McNulty |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Interne |
| Industry | Private Hospital |
| Class of Worker | PW |
| Hours Worked | 60 |
| Highest Grade | C 4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Interne |
| Township / Ward | Boston |
| Est. Birth Year | ~1913 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Bernard Mcnulty | Son | — | 19 | ~1921 |
| Kathleen Mcnulty | Daughter | — | 21 | ~1919 |
| Nellie Mcnulty | Spouse | — | 53 | ~1887 |
| John Mcnulty | Head | — | 55 | ~1885 |
| Robert Mcnulty | Son | — | 11 | ~1929 |
| John Mcnulty | Son | — | 27 | ~1913 |
| David Mcnulty | Son | — | 13 | ~1927 |
| Mary Mcnulty | Daughter | — | 30 | ~1910 |
| William Mcnulty | Son | — | 17 | ~1923 |
| Edward Mcnulty | Son | — | 16 | ~1924 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 7
Suffolk, Massachusetts · implied b. ~1913 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNulty |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 17
Suffolk, Massachusetts · implied b. ~1913 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNulty |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 27
Suffolk-County, Massachusetts · implied b. ~1913 — 10 household members
| Surname | McNulty |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Interne |
| Industry | Private Hospital |
| Class of Worker | PW |
| Hours Worked | 60 |
| Highest Grade | C 4 |
| 1935 Residence | Same House |
| 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 Mcnulty across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mcnulty (~0.92 confidence) and father John Mcnulty (~0.92 confidence) and mother Joan Mcnulty (~0.92 confidence) and mother Nellie Mcnulty (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mcnulty
b. ~1885
Source father
● Household
· direct · ~0.92
Father
John Mcnulty
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Joan Mcnulty
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Nellie Mcnulty
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcnulty
Son · 1940 · age 27 · b. ~1913 · Massachusetts
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Sibling
Edward Mcnulty
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Mcnulty
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Mcnulty
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Mcnulty
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Mcnulty
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcnulty
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Mcnulty
Sibling · 1940 · age 13
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 — 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-t0627-01679-00539)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward Powers | 27 | Son | Printer | Massachusetts |
| 2 | John J Mcnulty | 55 | Head | Inspector | Massachusetts |
| 3 | Nellie M Mcnulty | 53 | Wife | — | Massachusetts |
| 4 | Mary Mcnulty | 30 | Daughter | School Teacher | Massachusetts |
| 5 | John Jr Mcnulty THIS PERSON | 27 | Son | Interne | Massachusetts |
| 6 | Kathleen Mcnulty | 21 | Daughter | — | Massachusetts |
| 7 | Bernard J Mcnulty | 19 | Son | Mechanic | Massachusetts |
| 8 | William Mcnulty | 17 | Son | — | Massachusetts |
| 9 | Edward Mcnulty | 16 | Son | — | Massachusetts |
| 10 | David F Mcnulty | 13 | Son | — | Massachusetts |
| 11 | Robert Mcnulty | 11 | Son | — | Massachusetts |
| 12 | Thomas Carlson | 35 | Head | Filing Clerk | Massachusetts |
| 13 | Theresa E Carlson | 32 | Wife | — | Massachusetts |
| 14 | Fredrick M Harlow | 34 | Head | Mechanic | Massachusetts |
| 15 | Beatrice A Harlow | 25 | Daughter | — | Massachusetts |
| 16 | Ellen F Kelly | 82 | Head | — | Massachusetts |
| 17 | William Kelly | 81 | Brother | — | Massachusetts |
| 18 | Elizabeth Kelly | 80 | Sister | — | Massachusetts |
| 19 | Helen G Reardon | 50 | Niece | Stenographer | Massachusetts |
| 20 | Alice V Kenney | 73 | Head | — | Canada-English |
| 21 | Phillip F Kenney | 34 | Son | Broker | Massachusetts |
| 22 | Wilton B Sprague | 23 | Head | Chauffeur | Massachusetts |
| 23 | Anna Sprague | 25 | Wife | — | Massachusetts |
| 24 | Wilton Jr Sprague | 5 | Son | — | Massachusetts |
| 25 | John Sullivan | 40 | Head | Porter | Massachusetts |
| 26 | Mary A Sullivan | 47 | Wife | — | Massachusetts |
| 27 | Arthur Sullivan | 19 | Son | New Worker | Massachusetts |
| 28 | David Sullivan | 18 | Son | — | Massachusetts |
| 29 | Mary Sullivan | 15 | Daughter | — | Massachusetts |
| 30 | Joseph Sullivan | 12 | Son | — | Massachusetts |
| 31 | Charles Mcheck | 49 | Head | Laborer | Massachusetts |
| 32 | Caroline Mcheck | 45 | Wife | — | Massachusetts |
| 33 | Elizabeth Mcheck | 15 | Daughter | — | Massachusetts |
| 34 | Richard Mcheck | 13 | Son | — | Massachusetts |
| 35 | Donald Mcheck | 8 | Son | — | Massachusetts |
| 36 | Carole Mcheck | 3 | Daughter | — | Massachusetts |
| 37 | Alfred Hilton | 61 | Head | Superintendent Of Building | Canada-English |
| 38 | Lettie S Hilton | 61 | Wife | — | Canada-English |
| 39 | Ellridge Devine | 46 | Head | Mechanic | Massachusetts |
| 40 | Nellie Q Devine | 45 | Wife | — | Massachusetts |
Pedigree Summary
John + 7 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)