JC
John Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Mary-County, Louisiana
Our Model Tree links this John Clark across the 1920, 1930 and 1940 US Censuses in St.-Mary-County, Louisiana (XGBoost, ~Confirmed), with identified parents Herman & Lehman — first a son (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Male
Son
Born: Louisiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Mary-County, Louisiana |
| Surname | Clark |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Louisiana |
| 1935 Residence (City) | Orange |
| 1935 Residence (County) | Orange |
| Additional Details | |
| Occupation | Deck-hand |
| Industry | Freight Boat |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 40 |
| Highest Grade | C 3 |
| 1935 Residence | Texas |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Occupation | Deck-Hand |
| Township / Ward | Patterson Town |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Evelyn Clark | Daughter | — | 20 | ~1920 |
| Lehman Clark | Head | — | 20 | ~1920 |
| Georgie Clark | Other | — | 19 | ~1921 |
| Mary Clark | Other | — | 2 | ~1938 |
| John Clark | Son | — | 25 | ~1915 |
| Mary Clark | Spouse | — | 44 | ~1896 |
Census Appearances
1920
St Mary, …
Son, age 7
St Mary, Louisiana · implied b. ~1913 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read | No |
| Speaks English | No |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1930
St Mary, …
Son, age 18
St Mary, Louisiana · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read/Write | No |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1940
St.-Mary-County, Louisiana
Son, age 25
St.-Mary-County, Louisiana · implied b. ~1915 — 6 household members
| Surname | Clark |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Louisiana |
| 1935 Residence (City) | Orange |
| 1935 Residence (County) | Orange |
| Occupation | Deck-hand |
| Industry | Freight Boat |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 40 |
| Highest Grade | C 3 |
| 1935 Residence | Texas |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
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 Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Herman Clark (~0.92 confidence) and father Lehman Clark (~0.50 confidence) and father Lenhan Clark (~0.92 confidence) and father Eddie Clark (~0.45 confidence) and mother Viola Clark (~0.45 confidence) and mother Mary Clark (~0.92 confidence) and mother Mary Clark (~0.92 confidence). The pedigree spans 2 generations with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.73
Father
Herman Clark
b. ~1866
Source father
● Household
· direct · ~0.92
Father
Lehman Clark
b. ~1920
Source father
● Household
· direct · ~0.5
Father
Lenhan Clark
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Eddie Clark
b. ~1895
Source father>father
● Household
· direct · ~0.45
Mother
Viola Clark
b. ~1896
Source father>mother
● Household
· direct · ~0.45
Mother
Mary Clark
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Mary Clark
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Clark
Son · 1940 · age 25 · b. ~1915 · Louisiana
★ You are viewing this record
Sibling
Evelyn Clark
Sibling · 1940 · age 20
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 — St.-Mary-County, Louisiana
Open full size
1940 US Federal Census — St.-Mary-County, Louisiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01454-00516)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sarah Walker | 73 | Mother | — | Louisiana |
| 2 | Virginia Santee | 60 | Aunt | — | Louisiana |
| 3 | Henry Harrington | 67 | Head | Gardener | Louisiana |
| 4 | Mattie Harrington | 55 | Wife | — | Louisiana |
| 5 | Modest Harrington | 12 | Daughter | — | Louisiana |
| 6 | Betty Harrington | 7 | Granddaughter | — | Louisiana |
| 7 | Mannie Graham | 73 | Head | — | Louisiana |
| 8 | James Columbus | 23 | Grandson | Gardener | Louisiana |
| 9 | Mazie Graham | 22 | Daughter | — | Louisiana |
| 10 | Charles Ford | 3 | Great Grandson | — | Louisiana |
| 11 | Jerry Scott | 2 | Great Grandson | — | Louisiana |
| 12 | Lehman Clark | 20 | Head | Yard Man | Louisiana |
| 13 | Mary Clark | 44 | Wife | — | Louisiana |
| 14 | Evelyn Clark | 20 | Daughter | Servant | Louisiana |
| 15 | Georgie Belle Clark | 19 | Daughter-in-law | Servant | Texas |
| 16 | John Clark THIS PERSON | 25 | Son | Deck-Hand | Louisiana |
| 17 | Mary Anne Clark | 2 | Granddaughter | — | Louisiana |
| 18 | Arthur Howard | 55 | Head | Laborer | Louisiana |
| 19 | Osellia Howard | 48 | Wife | — | Louisiana |
| 20 | Minerva Gordon | 20 | Head | — | Louisiana |
| 21 | Elodie Robertson | 27 | Head | — | Louisiana |
| 22 | Sylvester Southall | 13 | Nephew | — | Louisiana |
| 23 | Ina Verret | 26 | Lodger | Farm Laborer | Louisiana |
| 24 | William Marcell | 55 | Head | Farmer | Louisiana |
| 25 | Lucille Marcell | 41 | Wife | Cook | Louisiana |
| 26 | Jacob Merriman | 41 | Head | — | Virginia |
| 27 | Charles Harris | 65 | Head | — | Louisiana |
| 28 | Hattie Harris | 24 | Wife | — | Louisiana |
| 29 | Sarah Harris | 7 | Daughter | — | Louisiana |
| 30 | Ora May Harris | 4 | Daughter | — | Louisiana |
| 31 | Elizabeth Harris | 1 | Daughter | — | Louisiana |
| 32 | William Blackman | 59 | Head | Field Laborer | Louisiana |
| 33 | Edmonia Blackman | 57 | Wife | — | Louisiana |
| 34 | John J. Fringali | 33 | Head | Fisherman | New York |
| 35 | Vincenza Fringali | 21 | Wife | — | Louisiana |
| 36 | Harrison Perry | 43 | Head | Laborer | Louisiana |
| 37 | Leola Perry | 35 | Wife | — | Louisiana |
| 38 | Marlene Perry | 10 | Daughter | — | Louisiana |
| 39 | Allie Perry | 8 | Daughter | — | Louisiana |
| 40 | Lois Branch | 14 | Step-daughter | — | Louisiana |
Pedigree Summary
John + 1 sibling
Gen 1 · 5 parents
~0.84
Gen 2 · 2 grandparents
~0.45
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)