TS
Thomas Simpson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Charles-County, Maryland
Our Model Tree links this Thomas Simpson across the 1920, 1930 and 1940 US Censuses in Charles-County, Maryland (XGBoost, ~Confirmed), with identified parents William & Ida — first a head (b.~1894), then head of a 8-person household.
Age 46
b. ~1894
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Charles-County, Maryland |
| Surname | Simpson |
| Given Name | Thomas A. (x) |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Mt. Plains |
| 1935 Residence (County) | Charles |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farmer |
| Township / Ward | Mt Plains |
| Est. Birth Year | ~1894 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Alice Simpson | Spouse | — | 36 | ~1904 |
| Thomas Simpson | Head | — | 46 | ~1894 |
| Thomas Simpson | Son | — | 1 | ~1939 |
| Mary Simpson | Daughter | — | 12 | ~1928 |
| Dorothy Simpson | Daughter | — | 9 | ~1931 |
| Elaine Simpson | Daughter | — | 7 | ~1933 |
| Katherine Simpson | Daughter | — | 11 | ~1929 |
| Betty Simpson | Daughter | — | 5 | ~1935 |
Census Appearances
1920
Charles, Maryland
Son, age 26
Charles, Maryland · implied b. ~1894 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Charles, Maryland
Head, age 36
Charles, Maryland · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Thomas A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 22 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | VVVV O |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Charles-County, Maryland
Head, age 46
Charles-County, Maryland · implied b. ~1894 — 8 household members
| Surname | Simpson |
| Given Name | Thomas A. (x) |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Mt. Plains |
| 1935 Residence (County) | Charles |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same House |
| 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 Thomas Simpson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Simpson (~0.92 confidence) and mother Ida Simpson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Simpson
b. ~1852
Source father
● Household
· direct · ~0.92
Mother
Ida Simpson
b. ~1866
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Simpson
Head · 1940 · age 46 · b. ~1894 · 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 — Charles-County, Maryland
Open full size
1940 US Federal Census — Charles-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01546-00262)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ina M. School | 40 | wife | — | Virginia |
| 2 | Ann H. (Ab) School | 16 | daughter | — | Maryland |
| 3 | Walter S. School | 11 | son | — | Maryland |
| 4 | Hugh M. Mitchell | 38 | Head | Proprietor | Maryland |
| 5 | Virginia Mitchell | 33 | wife | — | Maryland |
| 6 | Hugh M. Jr Mitchell | 7 | son | — | Maryland |
| 7 | Mary D. Mitchell | 4 | daughter | — | Maryland |
| 8 | Ann C. Mitchell | 2 | daughter | — | Maryland |
| 9 | Alfred Ley | 58 | Head | Proprietor | England |
| 10 | Arthur Ley | 54 | brother | Proprietor | D.C. |
| 11 | William P. Blair | 33 | Head | Carpenter | Maryland |
| 12 | Bernice M. Blair | 23 | wife | — | Maryland |
| 13 | Blaine Blair | 7 | son | — | Maryland |
| 14 | Marshall Blair | 1 | son | — | Maryland |
| 15 | Aubrey Marshall | 19 | brother in law | — | Maryland |
| 16 | Julia A. Willett | 60 | Head | — | Maryland |
| 17 | Gale Willett | 22 | son | Farmer | Maryland |
| 18 | Frank Connell | 47 | Head | Carpenter | Colorado |
| 19 | Rose (X) Connell | 41 | wife | — | Hungary |
| 20 | Thomas A. (X) Simpson THIS PERSON | 46 | Head | Farmer | Maryland |
| 21 | Alice C. Simpson | 36 | wife | — | Maryland |
| 22 | Mary A. Simpson | 12 | daughter | — | Maryland |
| 23 | Katherine I. Simpson | 11 | daughter | — | Maryland |
| 24 | Dorothy Simpson | 9 | daughter | — | Maryland |
| 25 | Elaine Simpson | 7 | daughter | — | Maryland |
| 26 | Betty Simpson | 5 | daughter | — | Maryland |
| 27 | Thomas A. Jr Simpson | 1 | son | — | Maryland |
| 28 | James E. Gardiner | 59 | Head | Farmer | Maryland |
| 29 | Elizabeth M. Gardiner | 60 | wife | — | Maryland |
| 30 | Joseph Austin Robey | 50 | Head | Farmer | Maryland |
| 31 | Beatrice M. Robey | 37 | wife | — | Maryland |
| 32 | Joseph Nelson Robey | 15 | son | — | Maryland |
| 33 | Charles Nolan Robey | 11 | son | — | Maryland |
| 34 | Charles T. Willett | 38 | Head | Farmer | Maryland |
| 35 | Minnie A. Willett | 35 | wife | — | Maryland |
| 36 | Agnes I. Willett | 15 | daughter | — | Maryland |
| 37 | Edna M. Willett | 12 | daughter | — | Maryland |
| 38 | Charles Seymour | 22 | Hired man | Laborer | Maryland |
| 39 | James I. Hancock | 30 | Head | Chauffeur | Maryland |
| 40 | Mabel Hancock | 26 | wife | — | Maryland |
Related Census Records
Pedigree Summary
Thomas
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)