JD
John Donnelly — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cuyahoga-County, Ohio
Our Model Tree links this John Donnelly across the 1920, 1930 and 1940 US Censuses in Cuyahoga-County, Ohio (XGBoost, ~Confirmed), with identified parents John & Margaret — first a head (b.~1912), then head of a 5-person household.
Age 28
b. ~1912
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cuyahoga-County, Ohio |
| Surname | Donnelly |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (County) | Cuyahoga |
| Additional Details | |
| Occupation | 40 |
| Industry | record keeper |
| Class of Worker | steel mill |
| Highest Grade | Hs 2 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | 40 |
| Township / Ward | Maple Heights City |
| Est. Birth Year | ~1912 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Theresa Donnelly | Daughter | — | 1 | ~1939 |
| Patricia Donnelly | Daughter | — | 3 | ~1937 |
| John Donnelly | Head | — | 28 | ~1912 |
| John Donnelly | Son | — | 5 | ~1935 |
| Mary Donnelly | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Cuyahoga, Ohio
Son, age 8
Cuyahoga, Ohio · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | John T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Cuyahoga, Ohio
Son, age 18
Cuyahoga, Ohio · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Ohio |
| Occupation | Recorder |
| Industry | Steel Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Cuyahoga-County, Ohio
Head, age 28
Cuyahoga-County, Ohio · implied b. ~1912 — 5 household members
| Surname | Donnelly |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (County) | Cuyahoga |
| Occupation | 40 |
| Industry | record keeper |
| Class of Worker | steel mill |
| Highest Grade | Hs 2 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 John Donnelly (~0.92 confidence) and mother Margaret Donnelly (~0.92 confidence) and mother Winifred Donnelly (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Donnelly
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Margaret Donnelly
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Winifred Donnelly
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Donnelly
Head · 1940 · age 28 · b. ~1912 · Ohio
★ 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 — Cuyahoga-County, Ohio
Open full size
1940 US Federal Census — Cuyahoga-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03056-00635)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | August Piscitello | 2 | Son | — | Ohio |
| 2 | William F. Sladek | 34 | Head | 40 | Ohio |
| 3 | Stella V. Sladek | 33 | Wife | — | Ohio |
| 4 | Irene Sladek | 8 | Daughter | — | Ohio |
| 5 | Mary Sznarback | 86 | Lodger | — | Ohio |
| 6 | Allan S. Hare | 34 | Head | 40 | Pennsylvania |
| 7 | Mildred A. Hare | 30 | Wife | 60 | Pennsylvania |
| 8 | George Hare | 8 | Son | — | Ohio |
| 9 | Walter Gawronski | 33 | Head | 40 | Ohio |
| 10 | Frieda Gawronski | 27 | Wife | — | Ohio |
| 11 | Walter Gawronski | 5 | Son | — | Ohio |
| 12 | Geraldine Gawronski | 3 | Daughter | — | Ohio |
| 13 | Dorothy Erbacker | 16 | Lodger | 3 | Ohio |
| 14 | Leonard Erbacker | 9 | Lodger | — | Ohio |
| 15 | John F. Donnelly THIS PERSON | 28 | Head | 40 | Ohio |
| 16 | Mary M. Donnelly | 26 | Wife | — | Minnesota |
| 17 | John Donnelly | 5 | Son | — | Ohio |
| 18 | Patricia L. Donnelly | 3 | Daughter | — | Ohio |
| 19 | Theresa Donnelly | 1 | Daughter | — | Ohio |
| 20 | Robert Watkins | 36 | Head | 48 | Pennsylvania |
| 21 | Thelma @ Watkins | 34 | Wife | — | Ohio |
| 22 | Robert Watkins | 12 | Son | — | Ohio |
| 23 | John Watkins | 8 | Son | — | Ohio |
| 24 | Frank J. Velt | 27 | Head | 42 | Ohio |
| 25 | Helen E. Velt | 21 | Wife | — | Ohio |
| 26 | Gilbert R. Pepke | 32 | Head | 40 | Ohio |
| 27 | Anna Pepke | 25 | Wife | — | Ohio |
| 28 | Leonard Pepke | 8 | Son | — | Ohio |
| 29 | Jean Pepke | 4 | Daughter | — | Ohio |
| 30 | Clifford D. Mcintyre | 36 | Head | 108 | London, England |
| 31 | Betty J. Mcintyre | 31 | Wife | 40 | Ohio |
| 32 | Patricia Mcintyre | 10 | Daughter | — | Ohio |
| 33 | Mary Lou Mcintyre | 8 | Daughter | — | Ohio |
| 34 | Delores Mcintyre | 6 | Daughter | — | Ohio |
| 35 | Viola @ Gibbons | 63 | Head | — | Ohio |
| 36 | Arthur @ Guerman | 63 | Head | — | Ohio |
| 37 | Anna Guerman | 62 | Wife | — | Germany |
| 38 | Frank J. Charek | 47 | Head | 16 | Ohio |
| 39 | Christine Charek | 46 | Wife | — | Ohio |
| 40 | Franklin Charek | 18 | Son | 38 | Ohio |
Pedigree Summary
John
Gen 1 · 3 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)