JT
James Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this James Thomas across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Michael & Sarah — first a head (b.~1901), then head of a 4-person household.
Age 39
b. ~1901
Male
Head
Born: Maryland
Divorced
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Thomas |
| Given Name | James B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Divorced |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Stone Mason |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 300 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Stonemason |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1901 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Virginia Thomas | Daughter | — | 16 | ~1924 |
| James Thomas | Head | — | 39 | ~1901 |
| Sarah Thomas | Other | — | 64 | ~1876 |
| James Thomas | Son | — | 10 | ~1930 |
Census Appearances
1920
None, Maryland
Son, age 20
None, Maryland · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | James B |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Electrician |
| Industry | Ship Yard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Head, age 30
Baltimore, Maryland · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | James B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 22 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Stonemason |
| Industry | Masonry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 35 |
| Radio Set | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 39
Baltimore-City-County, Maryland · implied b. ~1901 — 4 household members
| Surname | Thomas |
| Given Name | James B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Divorced |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Stone Mason |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 300 |
| Highest Grade | H-1 |
| 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 James Thomas across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Michael Thomas (~0.92 confidence) and mother Sarah Thomas (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Thomas
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Sarah Thomas
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Thomas
Head · 1940 · age 39 · b. ~1901 · 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-t0627-01528-00435)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clarice L. Smith | 13 | Daughter | — | Maryland |
| 42 | Thelma M. Smith | 12 | Daughter | — | Maryland |
| 43 | Joan H. Smith | 10 | Daughter | — | Maryland |
| 44 | Clarence A. Smith | 7 | Son | — | Maryland |
| 45 | Katharine H. Smith | 5 | Daughter | — | Maryland |
| 46 | Justine A. Smith | 2 | Daughter | — | Maryland |
| 47 | George W. Nicklas | 40 | Head | Engineer (Fireman) | Maryland |
| 48 | Rachel M. Nicklas | 38 | Wife | — | Maryland |
| 49 | Norman W. Small | 43 | Head | Sheet Metal Worker | Pennsylvania |
| 50 | Margaret V. Small | 34 | Wife | Presser | Maryland |
| 51 | Norman W. Jr. Small | 12 | Son | — | Maryland |
| 52 | Richard F. Small | 10 | Son | — | Maryland |
| 53 | Lola C. Summers | 42 | Head | Fitter | Maryland |
| 54 | Eli J. Lawrence | 52 | Head | Butcher | Georgia |
| 55 | Caroline F. Lawrence | 42 | Wife | — | Maryland |
| 56 | Caroline L. Lawrence | 17 | Daughter | Presser | Maryland |
| 57 | Elinor M. Lawrence | 15 | Daughter | — | Maryland |
| 58 | Betty R. Lawrence | 14 | Daughter | — | Maryland |
| 59 | Edward S. Lawrence | 9 | Son | — | Maryland |
| 60 | John A. Lawrence | 5 | Son | — | Maryland |
| 61 | James B. Thomas THIS PERSON | 39 | Head | Stone Mason | Maryland |
| 62 | Virginia V. Thomas | 16 | Daughter | — | Maryland |
| 63 | James B. Jr. Thomas | 10 | Son | — | Maryland |
| 64 | Sarah J. Thomas | 64 | Mother | — | Maryland |
| 65 | Howard R. Weigle | 50 | Head | Selector Foreman | Pennsylvania |
| 66 | Eva G. Weigle | 59 | Wife | — | Maryland |
| 67 | Grace Hubbard | 80 | Mother-in-law | — | Maryland |
| 68 | Mary W. Lawrence | 53 | Head | — | Irish Free State |
| 69 | Paul B. Lawrence | 30 | Son | Street Car Operator | Maryland |
| 70 | Mary M. Lawrence | 17 | Daughter | — | Maryland |
| 71 | John G. Hefner | 43 | Head | Truck Driver | Maryland |
| 72 | William M. Hefner | 29 | Wife | Waitress | Maryland |
| 73 | Thelma Wingate | 13 | Daughter | — | Maryland |
| 74 | Albert C. Armacost | 62 | Head | — | Maryland |
| 75 | Betty V. Armacost | 54 | Wife | — | Maryland |
| 76 | Carroll R. Armacost | 32 | Son | — | Maryland |
| 77 | Charles C. Price | 31 | Son-in-law | Truck Driver | Maryland |
| 78 | Addie M. Price | 30 | Daughter | — | Maryland |
| 79 | Charles A. Price | 10 | Son | — | Maryland |
| 80 | Robert C. Price | 9 | Son | — | Maryland |
Pedigree Summary
James
Gen 1 · 2 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)