JT
John Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this John Thomas across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a son (b.~1920), then head of a 3-person household.
Age 20
b. ~1920
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Thomas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | pin setter |
| Industry | Bowling alley |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 794 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Pin Setter |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1920 |
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 |
|---|---|---|---|---|
| Charles Thomas | Head | — | 64 | ~1876 |
| John Thomas | Son | — | 20 | ~1920 |
| Emma Thomas | Spouse | — | 63 | ~1877 |
Census Appearances
1920
Baltimore, Maryland
Son, age
Baltimore, Maryland · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 10
Baltimore, Maryland · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 20
Baltimore-City-County, Maryland · implied b. ~1920 — 3 household members
| Surname | Thomas |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | pin setter |
| Industry | Bowling alley |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 794 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Thomas (~0.92 confidence) and father Charles Thomas (~0.92 confidence) and father George Thomas (~0.92 confidence) and mother Edna Thomas (~0.92 confidence) and mother Emma Thomas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Thomas
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Charles Thomas
b. ~1876
Source father
● Household
· direct · ~0.92
Father
George Thomas
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Edna Thomas
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Emma Thomas
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Thomas
Son · 1940 · age 20 · b. ~1920 · Maryland
★ 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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01517-00464)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Linda Mcclutchen | 38 | Head | Cook | Maryland |
| 42 | Ruth Cochran | 23 | Lodger | Waitress | Maryland |
| 43 | Bessie Sauller | 26 | Head | Elevator Operator | Arkansas |
| 44 | Myrtle Sauller | 20 | Wife | Elevator Operator | Arkansas |
| 45 | Mary Thurman | 26 | Lodger | Maid | Arkansas |
| 46 | Columbus Shepland | 21 | Lodger | Labor | Virginia |
| 47 | Charles Thomas | 64 | Head | — | Maryland |
| 48 | Emma Thomas | 63 | Wife | — | Maryland |
| 49 | John Thomas THIS PERSON | 20 | Son | Pin Setter | Maryland |
| 50 | John Williams | 32 | Head | Labor | Virginia |
| 51 | Ella Williams | 32 | Wife | — | Carolina |
| 52 | Howard Edwards | 30 | Lodger | Labor | Virginia |
| 53 | Ellis Alston | 22 | Lodger | Labor | Carolina |
| 54 | Nick Carver | 40 | Lodger | Labor | Virginia |
| 55 | Frank Branch | 38 | Lodger | Labor | Virginia |
| 56 | William Smith | 24 | Lodger | Porter | Carolina |
| 57 | George Ellout | 26 | Lodger | Porter | Virginia |
| 58 | George W Rothgeb | 62 | Head | Business | Pennsylvania |
| 59 | Rosa Rothgeb | 51 | Wife | — | Maryland |
| 60 | Naomi Rothgeb | 13 | Daughter | — | Maryland |
| 61 | Elizabeth Distler | 26 | Lodger | — | Pennsylvania |
| 62 | James Garner | 51 | Head | — | Maryland |
| 63 | Jessie Garner | 44 | Wife | — | Maryland |
| 64 | Helen Garner | 14 | Daughter | — | Maryland |
| 65 | Thelma Garner | 8 | Daughter | — | Maryland |
| 66 | Earl Garner | 5 | Son | — | Maryland |
| 67 | Charles Krafton | 30 | Head | Labor | Virginia |
| 68 | Coldon Krafton | 30 | Wife | — | Virginia |
| 69 | Dorthamay Krafton | 1 | Daughter | — | Maryland |
| 70 | Charles Krafton | 2 | Son | — | Maryland |
| 71 | Hazel Bryant | 29 | Lodger | Maid | Virginia |
| 72 | Here Ends Block #33 And Begins Block #34 | None | — | — | — |
| 73 | Effie Chappell | 47 | Head | Char Woman | Carolina |
| 74 | William Chappell | 21 | Son | Labor | Carolina |
| 75 | George Chappell | 18 | Son | New Worker | Maryland |
| 76 | Victoria Jones | 30 | Daughter | Char Woman | Virginia |
| 77 | Bernice Jones | 12 | Daughter | — | Maryland |
| 78 | William Foster | 34 | Head | Labor | Virginia |
| 79 | Rosie Foster | 30 | Wife | Maid | Virginia |
| 80 | Arthur Watkins | 33 | Lodger | Labor | Virginia |
Pedigree Summary
John
Gen 1 · 5 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)