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John Mcnulty — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Mcnulty across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 11-person household.
Age 17
b. ~1923
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McNulty |
| Given Name | John Paul |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Oak Park Village |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Industry | S |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Oak Park Village |
| Est. Birth Year | ~1923 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Mcnulty | Son | — | 17 | ~1923 |
| Richard Pachynski | Son | — | 21 | ~1919 |
| Audrey Paul | Daughter | — | 17 | ~1923 |
| Philomena Mcnulty | Spouse | — | 51 | ~1889 |
| Kathryn Mcnulty | Daughter | — | 9 | ~1931 |
| John Mcnulty | Head | — | 52 | ~1888 |
| Josephine Mcnulty | Daughter | — | 19 | ~1921 |
| Kathryn Mccay | Daughter | — | 18 | ~1922 |
| James Mccay | Son | — | 22 | ~1918 |
| Marguerite Mcnulty | Daughter | — | 16 | ~1924 |
| Jacqueline Paul | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1923 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNulty |
| Given Name | John P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 17
Cook-County, Illinois · implied b. ~1923 — 11 household members
| Surname | McNulty |
| Given Name | John Paul |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Oak Park Village |
| 1935 Residence (County) | Cook |
| Industry | S |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcnulty
Son · 1940 · age 17 · b. ~1923 · Illinois
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Sibling
Kathryn Mcnulty
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Mcnulty
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marguerite Mcnulty
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jacqueline Paul
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Audrey Paul
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mccay
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Pachynski
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathryn Mccay
Sibling · 1940 · age 18
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00784-00899)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter Leverentz | 40 | Head | Warehouse Manager | Illinois |
| 2 | Hazel Leverentz | 43 | Wife | — | Illinois |
| 3 | Robert Leverentz | 12 | Son | — | Illinois |
| 4 | Gertrude Redmer | 51 | Lodger | Corset Maker | Illinois |
| 5 | John F. Mcnulty | 52 | Head | Teacher | Massachusetts |
| 6 | Philomena Mcnulty | 51 | Wife | — | Illinois |
| 7 | Josephine Mcnulty | 19 | Daughter | — | Illinois |
| 8 | John Paul Mcnulty THIS PERSON | 17 | Son | — | Illinois |
| 9 | Marguerite Mcnulty | 16 | Daughter | — | Illinois |
| 10 | Kathryn Mcnulty | 9 | Daughter | — | Illinois |
| 11 | James Mccay | 22 | Son | — | Illinois |
| 12 | Kathryn Mccay | 18 | Daughter | — | Illinois |
| 13 | Audrey L. Paul | 17 | Daughter | — | Illinois |
| 14 | Jacqueline Paul | 11 | Daughter | — | Illinois |
| 15 | Richard Pachynski | 21 | Son | Bookkeeper | Illinois |
| 16 | Albert B. Crawford | 59 | Head | Manager | Ohio |
| 17 | Ruth Crawford | 42 | Wife | — | Maine |
| 18 | Jean Crawford | 21 | Daughter | — | Illinois |
| 19 | James B. Crawford | 19 | Son | — | Illinois |
| 20 | Frances Rafferty | 32 | Lodger | Service Clerk | Illinois |
| 21 | Paul Merten | 48 | Head | Electrician | Illinois |
| 22 | Milton Merten | 23 | Son | Teacher | Illinois |
| 23 | Roreen Merten | 16 | Daughter | Secretary | Wyoming |
| 24 | Fanny White | 66 | Head | — | Wisconsin |
| 25 | May Gallup | 62 | Lodger | Teacher | Illinois |
| 26 | Martin R. Cassel | 64 | Head | Foreman | Pennsylvania |
| 27 | Zaidee Cassel | 62 | Wife | — | Pennsylvania |
| 28 | Perry W. Swern | 50 | Head | Architect | Indiana |
| 29 | Caroline Swern | 52 | Wife | — | Illinois |
| 30 | John Swern | 24 | Son | — | Illinois |
| 31 | Perry Jr. Swern | 22 | Son | — | Illinois |
| 32 | Frank J. Foley | 62 | Head | Engraver | Ohio |
| 33 | Sara Foley | 61 | Wife | — | Ohio |
| 34 | William Bigger | 56 | Head | Bookkeeper | New York |
| 35 | Anna Peters | 58 | Housekeeper | — | Canada English |
| 36 | F. Grant Fisk | 37 | Head | Electrical Engineer | North Ireland |
| 37 | Grace Fisk | 34 | Wife | — | Kansas |
| 38 | Irwin F. Fisk | 5 | Son | — | Illinois |
| 39 | Robert Fisk | 2 | Son | — | Illinois |
| 40 | Ida Lingle | 60 | Head | — | Wisconsin |
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)