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John Donnelly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Donnelly across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Donnelly |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh city |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1928 |
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 |
|---|---|---|---|---|
| Patricia Donnelly | Daughter | — | 7 | ~1933 |
| Rosemarie Donnelly | Daughter | — | 3 | ~1937 |
| Mary Donnelly | Daughter | — | 5 | ~1935 |
| Catherine Donnelly | Daughter | — | 10 | ~1930 |
| Katherine Donnelly | Head | — | 36 | ~1904 |
| Arthur Donnelly | Son | — | 16 | ~1924 |
| Thomas Donnelly | Son | — | ~1940 | |
| John Donnelly | Son | — | 12 | ~1928 |
| James Donnelly | Son | — | 8 | ~1932 |
| Joseph Donnelly | Son | — | 14 | ~1926 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 3
Allegheny, Pennsylvania · implied b. ~1927 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 12
Allegheny-County, Pennsylvania · implied b. ~1928 — 10 household members
| Surname | Donnelly |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh city |
| 1935 Residence (County) | Allegheny |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Donnelly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Donnelly
Son · 1940 · age 12 · b. ~1928 · Pennsylvania
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Sibling
Joseph Donnelly
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Donnelly
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Donnelly
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Donnelly
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Donnelly
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosemarie Donnelly
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Donnelly
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Donnelly
Sibling · 1940 · age 8
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03672-00961)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dominick Margello | 47 | Lodger | Laborer | Italy |
| 42 | John Kuzman | 55 | Lodger | Laborer | Germany |
| 43 | Max Ackerman | 69 | Lodger | Laborer | Germany |
| 44 | Ralph Adams | 49 | Head | Asst Superintendent | Pennsylvania |
| 45 | Emma Adams | 44 | Wife | — | Pennsylvania |
| 46 | Dimitrios Gorgoulas | 47 | Head | Apple Vendor | Greece |
| 47 | Demetrios Georgelos | 52 | Partner | Apple Vendor | Greece |
| 48 | James Lucas | 48 | Head | Janitor | Lithuania |
| 49 | Mary Lucas | 40 | Wife | — | Lithuania |
| 50 | Frank Lucas | 13 | Son | — | Pennsylvania |
| 51 | Genevieve Lucas | 3 | Daughter | — | Pennsylvania |
| 52 | Eli Giasou | 47 | Head | Blacksmith Helper | Romania |
| 53 | Mary Giasou | 47 | Wife | — | Romania |
| 54 | Thomas Moneck | 44 | Head | Laborer | Austria |
| 55 | Bertha Moneck | 44 | Wife | — | Austria |
| 56 | Thomas Jr. Moneck | 17 | Son | Woodsman | Pennsylvania |
| 57 | Helen Moneck | 15 | Daughter | — | Pennsylvania |
| 58 | Ruth Moneck | 11 | Daughter | — | Pennsylvania |
| 59 | William Moneck | 7 | Son | — | Pennsylvania |
| 60 | Frances Campbell | 42 | Head | — | Kentucky |
| 61 | Albert F. Lutz | 40 | Lodger | Mach. Operator | Pennsylvania |
| 62 | Alvin C. Kretka | 66 | Lodger | — | Pennsylvania |
| 63 | Andrew J. Loos | 28 | Lodger | Butcher | Pennsylvania |
| 64 | Katherine Donnelly | 36 | Head | — | Pennsylvania |
| 65 | Arthur Donnelly | 16 | Son | Newspaper Worker | Pennsylvania |
| 66 | Joseph Donnelly | 14 | Son | — | Pennsylvania |
| 67 | John Donnelly THIS PERSON | 12 | Son | — | Pennsylvania |
| 68 | Catherine Donnelly | 10 | Daughter | — | Pennsylvania |
| 69 | James Donnelly | 8 | Son | — | Pennsylvania |
| 70 | Patricia Donnelly | 7 | Daughter | — | Pennsylvania |
| 71 | Mary Margaret Donnelly | 5 | Daughter | — | Pennsylvania |
| 72 | Rosemarie Donnelly | 3 | Daughter | — | Pennsylvania |
| 73 | Thomas Donnelly | 0 | Son | — | Pennsylvania |
| 74 | Steve Palia | 52 | Head | Laborer | Greece |
| 75 | George Palia | 18 | Son | Newspaper Worker | Pennsylvania |
| 76 | Michael Palia | 14 | Son | — | Pennsylvania |
| 77 | Madeline Palia | 11 | Daughter | — | Pennsylvania |
| 78 | Walter Fadik | 39 | Head | Laborer | Poland |
| 79 | Mary Fadik | 40 | Wife | — | Lithuania |
| 80 | Alex Fadik | 20 | Son | Newspaper Worker | Pennsylvania |
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)