JD
John Donnelly — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this John Donnelly across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents David & Helen — first a head (b.~1900), then head of a 4-person household.
Age 40
b. ~1900
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Donnelly |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Lineman |
| Industry | Electrical Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Lineman |
| Township / Ward | New York |
| Est. Birth Year | ~1900 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Donnelly | Head | — | 40 | ~1900 |
| John Donnelly | Son | — | 15 | ~1925 |
| Michael Donnelly | Son | — | 13 | ~1927 |
| Ann Donnelly | Spouse | — | 40 | ~1900 |
Census Appearances
1920
New York, …
Son, age 21
New York, New York · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Chauffeur |
| Industry | Corp. Cont. |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
New York, …
Head, age 28
New York, New York · implied b. ~1902 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | John T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1920 |
| Age at First Marriage | 27 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Salesman |
| Industry | City Police |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | $55 |
| Radio Set | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Kings-County, New …
Head, age 40
Kings-County, New York · implied b. ~1900 — 4 household members
| Surname | Donnelly |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Occupation | Lineman |
| Industry | Electrical Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father David Donnelly (~0.92 confidence) and mother Helen Donnelly (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
David Donnelly
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Helen Donnelly
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Donnelly
Head · 1940 · age 40 · b. ~1900 · New York
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02558-00574)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marten Olsen | 77 | Head | — | Norway |
| 2 | John H. Grape | 46 | Head | Butcher | New Jersey |
| 3 | Lillian Grape | 45 | Wife | — | New York |
| 4 | John H. Grape | 25 | Son | Helper | New York |
| 5 | George J. Grape | 21 | Son | — | New York |
| 6 | Marguerite Grape | 17 | Daughter | Nursemaid | New York |
| 7 | Fred Frauer | 69 | Lodger | — | New York |
| 8 | Thomas C. Devina | 32 | Head | Office Manager | New York |
| 9 | Edna M. Devina | 31 | Wife | — | New Jersey |
| 10 | Joan Devina | 6 | Daughter | — | New York |
| 11 | Patricia Devina | 3 | Daughter | — | New York |
| 12 | Mary Devina | 0 | Daughter | — | New York |
| 13 | Howard Parlow | 35 | Head | Stat. Engineer | New York |
| 14 | Mildred Parlow | 32 | Wife | — | New York |
| 15 | Joan Parlow | 12 | Daughter | — | New York |
| 16 | George Parlow | 11 | Son | — | New York |
| 17 | William Parlow | 6 | Son | — | New York |
| 18 | Anne Parlow | 1 | Daughter | — | New York |
| 19 | Walter Singer | 33 | Head | Clerk | New York |
| 20 | Jane Singer | 31 | Wife | — | New York |
| 21 | Harriet Singer | 8 | Daughter | — | New York |
| 22 | George Singer | 4 | Son | — | New York |
| 23 | Thomas Singer | 2 | Son | — | New York |
| 24 | John Donnelly THIS PERSON | 40 | Head | Lineman | Ireland |
| 25 | Ann Donnelly | 40 | Wife | — | Ireland |
| 26 | John Jr. Donnelly | 15 | Son | — | Ireland |
| 27 | Michael Donnelly | 13 | Son | — | Ireland |
| 28 | Jean Hopkins | 54 | Head | Laborer | Louisiana |
| 29 | Clair Hopkins | 46 | Wife | — | Virginia |
| 30 | Almira Hopkins | 18 | Daughter | Stock Girl | Penn |
| 31 | Clair Hopkins | 17 | Daughter | — | Penn |
| 32 | Mildred Hopkins | 16 | Daughter | — | Penn |
| 33 | Virginia Hopkins | 15 | Daughter | — | New Jersey |
| 34 | Robert Hopkins | 14 | Son | — | New Jersey |
| 35 | Helen Hopkins | 13 | Daughter | — | New York |
| 36 | Marion Hopkins | 12 | Daughter | — | New York |
| 37 | Dorothy Hopkins | 9 | Daughter | — | New York |
| 38 | Marshall Hopkins | 8 | Son | — | New York |
| 39 | James O'Brief | 41 | Head | Sta. Policeman | New York |
| 40 | Helen O'Brief | 35 | Wife | — | New York |
Pedigree Summary
John
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)