JC
John Carroll — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this John Carroll across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1908), then head of a 3-person household.
Age 32
b. ~1908
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Carroll |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville city |
| Additional Details | |
| Occupation | City Hosp. |
| Industry | PW |
| Class of Worker | 700 |
| Highest Grade | 8 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | City Hosp. |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1908 |
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 |
|---|---|---|---|---|
| John Carroll | Head | — | 32 | ~1908 |
| John Carroll | Son | — | 7 | ~1933 |
| Helen Carroll | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Jefferson, Kentucky
Son, age 11
Jefferson, Kentucky · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| 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 | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Son, age 22
Jefferson, Kentucky · implied b. ~1908 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | Helper |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Head, age 32
Jefferson-County, Kentucky · implied b. ~1908 — 3 household members
| Surname | Carroll |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville city |
| Occupation | City Hosp. |
| Industry | PW |
| Class of Worker | 700 |
| Highest Grade | 8 |
| 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 Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Carroll (~0.92 confidence) and father John Carroll (~0.92 confidence) and mother Anna Carroll (~0.92 confidence) and mother Annie Carroll (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Carroll
b. ~1873
Source father
● Household
· direct · ~0.92
Father
John Carroll
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Anna Carroll
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Annie Carroll
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Carroll
Head · 1940 · age 32 · b. ~1908 · 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-t0627-01375-00180)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Agnes Smith | 3 | Daughter | — | Kentucky |
| 2 | Leon J. Vezolles | 39 | Head | Railroad | Kentucky |
| 3 | Veronica Vezolles | 35 | Wife | H | Kentucky |
| 4 | Mary A. Vezolles | 2 | Daughter | — | Kentucky |
| 5 | George L. Vezolles | 1 | Son | — | Kentucky |
| 6 | Katie Vezolles | 70 | Mother | H | Kentucky |
| 7 | Mason Tomes | 21 | Head | Furn. Mfg. | Kentucky |
| 8 | Helen Tomes | 16 | Wife | H | Kentucky |
| 9 | Ernest Atkinson | 29 | Head | Cooperage | Kentucky |
| 10 | Iona Atkinson | 30 | Wife | L. Co. | Kentucky |
| 11 | Helen Atkinson | 6 | Daughter | — | Kentucky |
| 12 | William Ford | 22 | Head | Hand Sander | Kentucky |
| 13 | Ruth Ford | 23 | Wife | — | Kentucky |
| 14 | Joyce Ann Ford | 1 | Daughter | — | Kentucky |
| 15 | John Carroll THIS PERSON | 32 | Head | City Hosp. | Kentucky |
| 16 | Helen Carroll | 31 | Wife | H | Kentucky |
| 17 | John Carroll | 7 | Son | — | Kentucky |
| 18 | Thomas Baxter | 39 | Head | Furn. Facty. | Kentucky |
| 19 | Helen Baxter | 39 | Wife | Tob. Co. | Kentucky |
| 20 | Bessie Baxter | 63 | Mother | H | Kentucky |
| 21 | Charles Keene | 28 | Head | City | Kentucky |
| 22 | Madeline Keene | 28 | Wife | H | Kentucky |
| 23 | Dorothy Keene | 10 | Daughter | — | Kentucky |
| 24 | Charles Jr. Keene | 7 | Son | — | Kentucky |
| 25 | Verna Keene | 2 | Daughter | — | Kentucky |
| 26 | John Barbey | 50 | Head | Stove Mfg. | Kentucky |
| 27 | Bessie Barbey | 45 | Wife | H | Kentucky |
| 28 | Beverly Barbey | 3 | Daughter | — | Kentucky |
| 29 | Albert Dacke | 47 | Head | Job Work | Kentucky |
| 30 | Claudia Dacke | 46 | Wife | H | Kentucky |
| 31 | Emile Dacke | 21 | Son | Metal Co. | Kentucky |
| 32 | Albert Dacke | 15 | Son | — | Kentucky |
| 33 | Elizabeth Dacke | 12 | Daughter | — | Kentucky |
| 34 | Louise Dacke | 10 | Daughter | — | Kentucky |
| 35 | Charles Bryant | 21 | Boarder | — | Kentucky |
| 36 | Orville Jenkins | 28 | Head | Wholesale Dairy Co. | Kentucky |
| 37 | Lucille Jenkins | 23 | Wife | Wholesale Mfg. Co. | Kentucky |
| 38 | Mary L. Jenkins | 2 | Daughter | — | Kentucky |
| 39 | Frederick Jenkins | 20 | Brother | Fire Brick | Kentucky |
| 40 | George Jordan | 47 | Head | Auto Facty. | So. Carolina |
Pedigree Summary
John
Gen 1 · 4 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)