LM
Louis Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Campbell-County, Kentucky
Our Model Tree links this Louis Martin across the 1920, 1930 and 1940 US Censuses in Campbell-County, Kentucky (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 3-person household.
Age 61
b. ~1879
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Campbell-County, Kentucky |
| Surname | Martin |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Newport City |
| 1935 Residence (County) | Campbell |
| Additional Details | |
| Occupation | Machinist |
| Industry | Mach. Tool |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 326 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Machinist |
| Township / Ward | Newport City |
| Est. Birth Year | ~1879 |
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 Louis | Age | Birth yr |
|---|---|---|---|---|
| Louis Martin | Head | — | 61 | ~1879 |
| Sophia Martin | Spouse | — | 55 | ~1885 |
| Marian Martin | Daughter | — | 23 | ~1917 |
Census Appearances
1920
Campbell, Kentucky
Head, age 41
Campbell, Kentucky · implied b. ~1879 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Ohio |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Machinist |
| Industry | Mach. Shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Campbell, Kentucky
Head, age 50
Campbell, Kentucky · implied b. ~1880 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 30 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Machinist |
| Industry | Machine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Campbell-County, Kentucky
Head, age 61
Campbell-County, Kentucky · implied b. ~1879 — 3 household members
| Surname | Martin |
| Given Name | Louis |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Newport City |
| 1935 Residence (County) | Campbell |
| Occupation | Machinist |
| Industry | Mach. Tool |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 326 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| 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 Louis Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Louis Martin
Head · 1940 · age 61 · b. ~1879 · 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 — Campbell-County, Kentucky
Open full size
1940 US Federal Census — Campbell-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01289-00731)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Emil Pumel | 55 | Head | Baker | Indiana |
| 2 | Olive Pumel | 62 | Wife | — | Kentucky |
| 3 | William Lawson | 24 | Head | Laborer | Kentucky |
| 4 | Dorothy Lawson | 19 | Wife | — | Kentucky |
| 5 | Robert Lawson | 1 | Son | — | Kentucky |
| 6 | Charles T. Wilson | 40 | Head | Car Repairer | Kentucky |
| 7 | Evelyn T. Wilson | 39 | Wife | — | Kentucky |
| 8 | Delmer T. Wilson | 17 | Son | Clerk | Kentucky |
| 9 | Eugene E. Wilson | 5 | Son | — | Kentucky |
| 10 | Howard J. Johnson | 23 | Son-in-law | Driver | Illinois |
| 11 | Dorothy A. Johnson | 19 | Daughter | — | Kentucky |
| 12 | Darlene E. Johnson | 0 | Granddaughter | — | Kentucky |
| 13 | Louis Martin THIS PERSON | 61 | Head | Machinist | Ohio |
| 14 | Sophia A. Martin | 55 | Wife | — | Indiana |
| 15 | Marian L. Martin | 23 | Daughter | Stenographer | Ohio |
| 16 | Charles Steiner | 37 | Head | Driver | Kentucky |
| 17 | Ann O. Steiner | 25 | Wife | Secy | Kentucky |
| 18 | Carmine Steiner | 13 | Daughter | — | Kentucky |
| 19 | Patricia Steiner | 12 | Daughter | — | Kentucky |
| 20 | Joan Steiner | 7 | Daughter | — | Kentucky |
| 21 | Janet Steiner | 7 | Daughter | — | Kentucky |
| 22 | William Schneider | 48 | Head | Peddler | Kentucky |
| 23 | Frances S. Schneider | 46 | Wife | — | Ohio |
| 24 | Ruth Schneider | 15 | Daughter | — | Kentucky |
| 25 | Edward Schneider | 44 | Head | Peddler | Kentucky |
| 26 | Lena O. Schneider | 47 | Wife | — | Kentucky |
| 27 | Robert Schneider | 19 | Son | Clerk | Kentucky |
| 28 | Margaret Schneider | 17 | Daughter | — | Kentucky |
| 29 | William Schneider | 16 | Son | Clerk | Kentucky |
| 30 | Edward Schneider | 14 | Son | — | Kentucky |
| 31 | Thomas Schneider | 7 | Son | — | Kentucky |
| 32 | Agnes Allgeyer | 55 | Son-in-law | — | Kentucky |
| 33 | Alfred Welch | 46 | Head | Turner | Ohio |
| 34 | Marie O. Welch | 46 | Wife | — | Kentucky |
| 35 | Marie Welch | 23 | Daughter | Steno | Kentucky |
| 36 | Thelma Welch | 16 | Daughter | Newsworker | Kentucky |
| 37 | Alvin Welch | 15 | Son | — | Kentucky |
| 38 | Eugene Welch | 10 | Son | — | Kentucky |
| 39 | Albert Smith | 38 | Head | Operator | Kentucky |
| 40 | Ethel O. Smith | 36 | Wife | — | Kentucky |
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)