JL
John Lynch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this John Lynch across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents Thomas & John — first a son (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Lynch |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Civil Engineer |
| Industry | Rail Road Company |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1200 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Civil Engineer |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1915 |
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 |
|---|---|---|---|---|
| Martha Lynch | Daughter | — | 23 | ~1917 |
| Barry Lynch | Daughter | — | 20 | ~1920 |
| John Lynch | Head | — | 62 | ~1878 |
| John Lynch | Son | — | 25 | ~1915 |
| Louise Lynch | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Jefferson, Kentucky
Son, age 3
Jefferson, Kentucky · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | John L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Son, age 14
Jefferson, Kentucky · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Son, age 25
Jefferson-County, Kentucky · implied b. ~1915 — 5 household members
| Surname | Lynch |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Occupation | Civil Engineer |
| Industry | Rail Road Company |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1200 |
| Highest Grade | C 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 Lynch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Lynch (~0.92 confidence) and father John Lynch (~0.92 confidence) and father Joseph Lynch (~0.92 confidence) and mother Bessie Lynch (~0.92 confidence) and mother Louise Lynch (~0.92 confidence) and mother Lula Lynch (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Lynch
b. ~1874
Source father
● Household
· direct · ~0.92
Father
John Lynch
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Joseph Lynch
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Bessie Lynch
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Louise Lynch
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Lula Lynch
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Lynch
Son · 1940 · age 25 · b. ~1915 · Kentucky
★ You are viewing this record
Sibling
Barry Lynch
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Lynch
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
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-t0627-01370-00511)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ann Cox | 20 | Wife | — | Kentucky |
| 42 | Llewellyn M. Toler | 26 | Head | Mill Rite | Mississippi |
| 43 | Pauline M. Toler | 21 | Wife | — | Mississippi |
| 44 | Henry Maddox | 32 | Head | Presser | North Carolina |
| 45 | Julia S. Maddox | 31 | Sister | Dietitian | North Carolina |
| 46 | Elizabeth Rodman | 36 | Sister | — | North Carolina |
| 47 | Thomas | 8 | Nephew | — | Tennessee |
| 48 | Katherine S. S. Mcknight | 41 | Head | Operator | Kentucky |
| 49 | Robert Mcknight | 16 | Son | — | Tennessee |
| 50 | Katherine Mcknight | 14 | Daughter | — | Kentucky |
| 51 | Carrie Suggs | 67 | Mother | — | Kentucky |
| 52 | Robert Suggs | 31 | Brother | Department Manager | Kentucky |
| 53 | Max J. Berkovitz | 58 | Head | Proprietor | Russia |
| 54 | Jane Berkovitz | 50 | Wife | Saleswoman | England |
| 55 | Riva Berkovitz | 18 | Daughter | Secretary | Indiana |
| 56 | Rosie Samuels | 76 | Mother-in-law | — | Russia |
| 57 | Esther Berkovitz | 56 | Sister | Saleswoman | Russia |
| 58 | Ida V. Samuels | 48 | Mother-in-law | Proprietor | Kentucky |
| 59 | Nat W. (W. H.) Weinberg | 47 | Head | Salesman | Russia |
| 60 | Violet R. Weinberg | 45 | Wife | — | Kentucky |
| 61 | Carolyn L. Weinberg | 21 | Daughter | Book-Keeper | Kentucky |
| 62 | David Weinberg | 19 | Son | — | Kentucky |
| 63 | Joseph M. Weinberg | 12 | Son | — | Kentucky |
| 64 | Laura E. S. Harris | 62 | Head | Salesman | Kentucky |
| 65 | D. Clark Harris | 80 | Mother | — | Kentucky |
| 66 | Howard H. Rees | 31 | Head | Book-Keeper | Michigan |
| 67 | Runa D. S. Rees | 31 | Wife | Stenographer | Illinois |
| 68 | Hattie Nr S. Woodson | 52 | Head | Saleswoman | Kentucky |
| 69 | Henry C. (C. L.) Woodson | 26 | Son | Salesman | Kentucky |
| 70 | Julia Woodson | 25 | Daughter | Jr. High Teacher | Kentucky |
| 71 | Elizabeth Woodson | 21 | Daughter | — | Ohio |
| 72 | Morris Ravitz | 40 | Head | Proprietor | Russia |
| 73 | Amelia S. Ravitz | 37 | Wife | Saleswoman | Russia? |
| 74 | Albert Ravitz | 16 | Son | Salesman | Kentucky |
| 75 | Natalie Ravitz | 13 | Daughter | — | Kentucky |
| 76 | John F. Lynch | 62 | Head | Superintendent Of Construction | Mass. |
| 77 | Louise L. S. Lynch | 49 | Wife | — | Kentucky |
| 78 | John J. Lynch THIS PERSON | 25 | Son | Civil Engineer | Kentucky |
| 79 | Martha Lynch | 23 | Daughter | — | Massachusetts |
| 80 | Barry Lynch | 20 | Daughter | — | Massachusetts |
Pedigree Summary
John + 2 siblings
Gen 1 · 6 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)