JT
John Thomson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Louisiana
Our Model Tree links this John Thomson across the 1930 and 1940 US Censuses in Jefferson-County, Louisiana (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 5-person household.
Age 10
b. ~1930
Male
Son
Born: Louisiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Louisiana |
| Surname | Thomson |
| Given Name | John II |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | Jefferson |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Est. Birth Year | ~1930 |
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 |
|---|---|---|---|---|
| Andrew Donaldson | Head | — | 67 | ~1873 |
| Shirley Donaldson | Son | — | 42 | ~1898 |
| Royal Thomson | Son | — | 31 | ~1909 |
| Elyn Thomson | Daughter | — | 29 | ~1911 |
| John Thomson | Son | — | 10 | ~1930 |
Census Appearances
1930
Jefferson, Louisiana
Other, age
Jefferson, Louisiana · implied b. ~1930 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomson |
| Given Name | John |
| Relationship to Head | Larson |
| Sex | M |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1940
Jefferson-County, Louisiana
Son, age 10
Jefferson-County, Louisiana · implied b. ~1930 — 5 household members
| Surname | Thomson |
| Given Name | John II |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | Jefferson |
| 1935 Residence (County) | Jefferson |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| 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 Thomson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Thomson
Son · 1940 · age 10 · b. ~1930 · Louisiana
★ You are viewing this record
Sibling
Elyn Thomson
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Royal Thomson
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Shirley Donaldson
Sibling · 1940 · age 42
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, Louisiana
Open full size
1940 US Federal Census — Jefferson-County, Louisiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01406-00741)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mira Smallwood | 38 | Wife | — | Louisiana |
| 42 | Percy Smallwood | 12 | Son | — | Louisiana |
| 43 | Edward Williams | 43 | Head | Laborer | Louisiana |
| 44 | Bernice Williams | 31 | Wife | — | Louisiana |
| 45 | Espictral Williams | 15 | Daughter | — | Louisiana |
| 46 | Fred Williams | 13 | Son | — | Louisiana |
| 47 | Thomas Chauvin | 38 | Head | Chauffeur | Louisiana |
| 48 | Martha Chauvin | 33 | Wife | Maid | Louisiana |
| 49 | Oscar Blouin | 63 | Father-in-law | — | Louisiana |
| 50 | Philander Smith | 43 | Head | Laborer | Louisiana |
| 51 | Eulamae Smith | 39 | Wife | — | Louisiana |
| 52 | Darcey Thomson | 27 | Head | Laborer | Louisiana |
| 53 | Arabella Thomson | 29 | Wife | Maid | Louisiana |
| 54 | Andrew Donaldson | 67 | Head | — | Louisiana |
| 55 | Shirley Donaldson | 42 | Son | Laborer | Louisiana |
| 56 | Elyn Thomson | 29 | Daughter | — | Louisiana |
| 57 | John Ii Thomson THIS PERSON | 10 | Son | — | Louisiana |
| 58 | Royal Thomson | 31 | Son | Laborer | Louisiana |
| 59 | Earl Moten | 32 | Head | Laborer | Louisiana |
| 60 | Wilma Moten | 18 | Wife | — | Louisiana |
| 61 | Ester Calvert | 48 | Mother | — | Louisiana |
| 62 | William Smith | 33 | Head | Laborer | Louisiana |
| 63 | Carrie Smith | 34 | Wife | — | Louisiana |
| 64 | Elena Smith | 16 | Daughter | — | Louisiana |
| 65 | Louise Elenor Smith | 12 | Daughter | — | Louisiana |
| 66 | Calvin Gourea | 32 | Head | Laborer | Louisiana |
| 67 | Coralee Gourea | 21 | Wife | — | Louisiana |
| 68 | Josephine Adam | 65 | Head | Yardman | Louisiana |
| 69 | Clarence Robertson | 17 | Grand-son | — | Louisiana |
| 70 | Beatrice Robertson | 15 | Grand-daughter | — | Louisiana |
| 71 | John Taylor | 62 | Head | Drayman | Louisiana |
| 72 | James P. Wright | 46 | Head | Laborer | Louisiana |
| 73 | Eglayia Wright | 33 | Wife | — | Louisiana |
| 74 | Saul Ferdinand | 42 | Head | Laborer | Louisiana |
| 75 | Minerva Ferdinand | 38 | Wife | — | Louisiana |
| 76 | Josephine Ferdinand | 19 | Daughter | — | Louisiana |
| 77 | Dorothy Ferdinand | 16 | Daughter | Maid | Louisiana |
| 78 | Florence Ferdinand | 14 | Daughter | — | Louisiana |
| 79 | Daisy Belle Ferdinand | 10 | Daughter | — | Louisiana |
| 80 | Rosa Lee Ferdinand | 9 | Daughter | — | Louisiana |
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)