JC
John Cahill — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kenton-County, Kentucky
Our Model Tree links this John Cahill across the 1930 and 1940 US Censuses in Kenton-County, Kentucky (XGBoost, ~Confirmed) — first a head (b.~1899), then head of a 11-person household.
Age 41
b. ~1899
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kenton-County, Kentucky |
| Surname | Cahill |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Elsmere Town |
| 1935 Residence (County) | Kenton |
| Additional Details | |
| Occupation | Foreman |
| Industry | X-ray Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Foreman |
| Township / Ward | Elsmere Town |
| Est. Birth Year | ~1899 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Louis Cahill | Son | — | 1 | ~1939 |
| Florence Cahill | Spouse | — | 38 | ~1902 |
| John Cahill | Head | — | 41 | ~1899 |
| Gerald Cahill | Son | — | 10 | ~1930 |
| Bernard Cahill | Son | — | 12 | ~1928 |
| Sarah Cahill | Daughter | — | ~1940 | |
| Rosemary Cahill | Daughter | — | 14 | ~1926 |
| James Cahill | Son | — | 5 | ~1935 |
| Eugene Cahill | Son | — | 8 | ~1932 |
| John Cahill | Son | — | 3 | ~1937 |
| Joseph Cahill | Son | — | 16 | ~1924 |
Census Appearances
1930
Kenton, Kentucky
Head, age 31
Kenton, Kentucky · implied b. ~1899 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cahill |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Kentucky |
| Age at First Marriage | 24 |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Foreman |
| Industry | X-Ray Manufactory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 3200 |
| Radio Set | R |
| Veteran | No |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Kenton-County, Kentucky
Head, age 41
Kenton-County, Kentucky · implied b. ~1899 — 11 household members
| Surname | Cahill |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Elsmere Town |
| 1935 Residence (County) | Kenton |
| Occupation | Foreman |
| Industry | X-ray Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2500 |
| Highest Grade | Hs 4 |
| 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 Cahill across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Cahill
Head · 1940 · age 41 · b. ~1899 · Kentucky
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Kenton-County, Kentucky
Open full size
1940 US Federal Census — Kenton-County, Kentucky
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-01325-00511)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John J. Cahill THIS PERSON | 41 | Head | Foreman | Kentucky |
| 2 | Florence Cahill | 38 | Wife | — | Kentucky |
| 3 | Joseph Jr. Cahill | 16 | Son | — | Kentucky |
| 4 | Rosemary Cahill | 14 | Daughter | — | Ohio |
| 5 | Bernard Cahill | 12 | Son | — | Kentucky |
| 6 | Gerald Cahill | 10 | Son | — | Kentucky |
| 7 | Eugene Cahill | 8 | Son | — | Kentucky |
| 8 | James Cahill | 5 | Son | — | Kentucky |
| 9 | John Cahill | 3 | Son | — | Kentucky |
| 10 | Louis Cahill | 1 | Son | — | Kentucky |
| 11 | Sarah Cahill | 0 | Daughter | — | Kentucky |
| 12 | Chas. Hobert | 69 | Head | Machine Opr. | Poland |
| 13 | Mary Hobert | 57 | Wife | — | Poland |
| 14 | Robt. E. Norton | 50 | Head | Asst. Foreman | Kentucky |
| 15 | Effie Norton | 40 | Wife | — | Kentucky |
| 16 | Finley Norton | 11 | Son | — | Kentucky |
| 17 | Clay Ferguson | 56 | Head | Boilermaker | Kentucky |
| 18 | Anna F. Ferguson | 47 | Wife | — | Kentucky |
| 19 | Forest F. Ferguson | 25 | Son | Clerk - Appr. | Kentucky |
| 20 | Paul Ferguson | 19 | Son | Brush Maker | Kentucky |
| 21 | Russell Ferguson | 16 | Son | — | Kentucky |
| 22 | Wallace Ferguson | 13 | Son | — | Kentucky |
| 23 | Neal Ferguson | 11 | Son | — | Kentucky |
| 24 | Annette Ferguson | 8 | Daughter | — | Kentucky |
| 25 | Clara James | 79 | Mother-in-law | — | Ohio |
| 26 | Chas. Victor | 67 | Head | — | Ohio |
| 27 | May Victor | 31 | Daughter | — | Ohio |
| 28 | Dorothy Victor | 28 | Daughter | Machine Opr. | Kentucky |
| 29 | Edward Victor | 26 | Son | Groc. Clerk | Ohio |
| 30 | Elizabeth Victor | 24 | Daughter | Tobacco Worker | Ohio |
| 31 | Leo Victor | 22 | Son | Groc. Clerk | Kentucky |
| 32 | Ernest Kreimer | 43 | Head | Iron Worker | Kentucky |
| 33 | Ethel Kreimer | 44 | Wife | Packer | Ohio |
| 34 | Estelle Frazier | 34 | Head | Order Man | Kentucky |
| 35 | Ethel Frazier | 31 | Wife | — | Kentucky |
| 36 | Pauline Frazier | 13 | Daughter | — | Ohio |
| 37 | Justine Frazier | 13 | Daughter | — | Ohio |
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)