JD
John Donnelly — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this John Donnelly across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents Joseph & Myrtle — first a head (b.~1919), then head of a 3-person household.
Age 21
b. ~1919
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Donnelly |
| Given Name | John P. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | clerk |
| Industry | grocery |
| Class of Worker | PW |
| Hours Worked | 64 |
| Income (1939) | 660 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Clerk |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1919 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Donnelly | Daughter | — | 2 | ~1938 |
| John Donnelly | Head | — | 21 | ~1919 |
| Grace Donnelly | Spouse | — | 19 | ~1921 |
Census Appearances
1920
Jefferson, Kentucky
Son, age 1
Jefferson, Kentucky · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Donnelly |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Son, age 11
Jefferson, Kentucky · implied b. ~1919 — 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 | 11 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Head, age 21
Jefferson-County, Kentucky · implied b. ~1919 — 3 household members
| Surname | Donnelly |
| Given Name | John P. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Occupation | clerk |
| Industry | grocery |
| Class of Worker | PW |
| Hours Worked | 64 |
| Income (1939) | 660 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Joseph Donnelly (~0.92 confidence) and mother Myrtle Donnelly (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Donnelly
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Myrtle Donnelly
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Donnelly
Head · 1940 · age 21 · b. ~1919 · Kentucky
★ 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 — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01374-00029)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ramona Bennett | 12 | daughter | — | Kentucky |
| 42 | Joan Bennett | 7 | daughter | — | Kentucky |
| 43 | George F. Dauk | 64 | head | Proprietor | Kentucky |
| 44 | Nettie Dauk | 65 | wife | Labeler | Kentucky |
| 45 | Sophia R. Hesse | 72 | head | — | Kentucky |
| 46 | Louis G. Hesse | 43 | son | Painter | Kentucky |
| 47 | William A. Klotz | 39 | head | Delivery Clerk | Kentucky |
| 48 | Thelma Klotz | 34 | wife | — | Kentucky |
| 49 | Harry G. Klotz | 16 | son | — | Kentucky |
| 50 | Thelma Klotz | 14 | daughter | — | Kentucky |
| 51 | Donald J. Klotz | 5 | son | — | Kentucky |
| 52 | Eugene D. Breitling | 57 | head | Proprietor | Kentucky |
| 53 | Bernadine Breitling | 53 | wife | — | Kentucky |
| 54 | Mary Rose Breitling | 28 | daughter | Report Clerk | Kentucky |
| 55 | Joseph Drees | 38 | lodger | Truck Driver | Germany |
| 56 | Mac Fischer | 58 | head | Proprietor Clerk | Kentucky |
| 57 | Earnest Wallace | 51 | head | Packer | Georgia |
| 58 | Eloise G. Wallace | 51 | wife | — | Missouri |
| 59 | Earnest Wallace | 22 | son | New Worker | Georgia |
| 60 | Ruth Phillips | 18 | daughter | Typist | Alabama |
| 61 | John P. Donnelly THIS PERSON | 21 | head | Clerk | Kentucky |
| 62 | Grace G. Donnelly | 19 | wife | — | Illinois |
| 63 | Elizabeth Donnelly | 2 | daughter | — | Kentucky |
| 64 | Mary V. G. Nelligan | 82 | head | — | Indiana |
| 65 | Henry C. Hendricks | 75 | nephew | — | Indiana |
| 66 | Catherine Oswald | 57 | servant | Housekeeper | Kentucky |
| 67 | Wilbert Messmer | 34 | head | Paper Hanger | Kentucky |
| 68 | Queenie G. Messmer | 28 | wife | — | Kentucky |
| 69 | Wilbert Messmer | 5 | son | — | Kentucky |
| 70 | Milton May | 50 | head | Laborer | Kentucky |
| 71 | Ada G. May | 49 | wife | — | Kentucky |
| 72 | Robert May | 23 | son | Mixer | Kentucky |
| 73 | Georgia May | 21 | daughter | Retier | Kentucky |
| 74 | Milton May | 17 | son | Library | Kentucky |
| 75 | Carrie C. May | 14 | daughter | — | Kentucky |
| 76 | Richard J. May | 13 | son | — | Kentucky |
| 77 | Harry May | 15 | nephew | — | Ohio |
| 78 | Louis Kircher | 44 | head | Laborer | Kentucky |
| 79 | Dora Kircher | 43 | wife | — | Kentucky |
| 80 | Beatrice Kircher | 13 | daughter | — | Kentucky |
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)