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Thomas Donnelly — 1940 US Census Record
Model Tree available1940 United States Federal Census · Erie-County, New York
Our Model Tree links this Thomas Donnelly across the 1920, 1930 and 1940 US Censuses in Erie-County, New York (XGBoost, ~Confirmed), with identified parents John & Margaret — first a son (b.~1909), then head of a 5-person household.
Age 31
b. ~1909
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Erie-County, New York |
| Surname | Donnelly |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Buffalo city |
| 1935 Residence (County) | Erie |
| Additional Details | |
| Occupation | Janitor |
| Industry | Apartment House |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 780 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Janitor |
| Township / Ward | Buffalo City |
| Est. Birth Year | ~1909 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Charles Donnelly | Son | — | 41 | ~1899 |
| Mary Donnelly | Other | — | 47 | ~1893 |
| John Donnelly | Head | — | 75 | ~1865 |
| Thomas Donnelly | Son | — | 31 | ~1909 |
| Margaret Donnelly | Spouse | — | 75 | ~1865 |
Census Appearances
1920
Erie, New …
Other, age 11
Erie, New York · implied b. ~1909 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | Thomas |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Erie, New …
Other, age 21
Erie, New York · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | Thomas J. |
| Relationship to Head | nephew |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | New York |
| Occupation | Inspector |
| Industry | Steel Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | no |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Erie-County, New …
Son, age 31
Erie-County, New York · implied b. ~1909 — 5 household members
| Surname | Donnelly |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Buffalo city |
| 1935 Residence (County) | Erie |
| Occupation | Janitor |
| Industry | Apartment House |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 780 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Thomas Donnelly across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Donnelly (~0.92 confidence) and mother Margaret Donnelly (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Donnelly
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Margaret Donnelly
b. ~1865
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Donnelly
Son · 1940 · age 31 · b. ~1909 · New York
★ You are viewing this record
Sibling
Charles Donnelly
Sibling · 1940 · age 41
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 — Erie-County, New York
Open full size
1940 US Federal Census — Erie-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02831-00541)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Irwin C. Caffery | 31 | Head | Truck Driver | New York |
| 42 | Sarah Caffery | 31 | Wife | — | New Jersey |
| 43 | Robert Caffery | 9 | Son | — | New York |
| 44 | Donald Caffery | 6 | Son | — | New York |
| 45 | David Caffery | 1 | Son | — | New York |
| 46 | David Donovan | 46 | Head | Bus Operator | New York |
| 47 | Marian Donovan | 36 | Wife | — | New York |
| 48 | Bernard Donovan | 10 | Son | — | New York |
| 49 | Jane Donovan | 7 | Dau | — | New York |
| 50 | David Donovan | 6 | Son | — | New York |
| 51 | Theodore Meier | 36 | Head | News Reporter | New York |
| 52 | Helen B. Meier | 29 | Wife | — | New York |
| 53 | John Gleason | 47 | Head | Bus Driver | English Canada |
| 54 | Jessie Gleason | 58 | Sister | — | English Canada |
| 55 | John Donnelly | 75 | Head | — | English Canada |
| 56 | Margaret Donnelly | 75 | Wife | — | English Canada |
| 57 | Charles Donnelly | 41 | Son | Laborer | English Canada |
| 58 | Mary Donnelly | 47 | Dau | — | English Canada |
| 59 | Thomas Donnelly THIS PERSON | 31 | Son | Janitor | New York |
| 60 | Clara A. Hake | 55 | Head | Dressmaker | New York |
| 61 | Callis Hake | 73 | Boarder | — | New York |
| 62 | Bernard Krensch | 49 | Head | Huckster | New York |
| 63 | Emma Krensch | 44 | Wife | — | New York |
| 64 | Bernard Jr. Krensch | 11 | Son | — | New York |
| 65 | Harry Goslin | 49 | Head | Steam Engineer | New York |
| 66 | Mildred Goslin | 42 | Wife | — | Holland |
| 67 | Catherine Goslin | 19 | Dau | Stenographer | New York |
| 68 | Russell Pett | 46 | Head | Truck Driver | New York |
| 69 | Mae Pett | 48 | Wife | — | New York |
| 70 | Lucy Pett | 19 | Dau | — | Penn |
| 71 | Lucille Pett | 17 | Dau | — | Penn |
| 72 | Dorothy Pett | 13 | Dau | — | Penn |
| 73 | Ruth Ann Pett | 9 | Dau | — | New York |
| 74 | Martha Carry | 48 | Head | Salesgirl | Canada-English |
| 75 | Dorothy Carry | 21 | Dau | Salesgirl | Canada-English |
| 76 | David Carry | 19 | Son | Stock Handler | Canada-English |
| 77 | Iris Carry | 15 | Dau | — | Canada-English |
| 78 | — | None | — | — | — |
| 79 | John O'Connor | 61 | Head | Cook | Ireland |
| 80 | Catherine O'Connor | 60 | Wife | — | Ireland |
Pedigree Summary
Thomas + 1 sibling
Gen 1 · 2 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)