TS
Theodore Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Theodore Smith across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents William & Julian — first a head (b.~1900), then head of a 4-person household.
Age 40
b. ~1900
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Smith |
| Given Name | Theodore |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Mt. Cordless |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1260 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Miner |
| Township / Ward | Mt Cordless |
| Est. Birth Year | ~1900 |
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 Theodore | Age | Birth yr |
|---|---|---|---|---|
| Betty Smith | Daughter | — | 18 | ~1922 |
| Theodore Smith | Head | — | 40 | ~1900 |
| Theodore Smith | Son | — | 13 | ~1927 |
| Helen Smith | Spouse | — | 36 | ~1904 |
Census Appearances
1900
Allegheny, Pennsylvania
Son, age 1
Allegheny, Pennsylvania · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Theodore |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Birth Month | Apr |
| Birth Year | 1899 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1910
Allegheny, Pennsylvania
Son, age 10
Allegheny, Pennsylvania · implied b. ~1900 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Theodore |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Son, age 20
Allegheny, Pennsylvania · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Theo |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Head, age 30
Allegheny, Pennsylvania · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Theodore |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 29 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | $4000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 40
Allegheny-County, Pennsylvania · implied b. ~1900 — 4 household members
| Surname | Smith |
| Given Name | Theodore |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Mt. Cordless |
| 1935 Residence (County) | Allegheny |
| Occupation | Miner |
| Industry | Coal Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1260 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Theodore Smith across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Smith (~0.92 confidence) and father Julian Smith (~0.92 confidence) and mother Ella Smith (~0.92 confidence) and mother Ada Smith (~0.92 confidence) and father Jacob Smith (~0.92 confidence) and mother Lillian Smith (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Smith
b. ~1859
Source father
● Household
· direct · ~0.92
Father
Julian Smith
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Ella Smith
b. ~1865
Source mother
● Household
· direct · ~0.92
Mother
Ada Smith
b. ~1866
Source mother
● Household
· direct · ~0.92
Father
Jacob Smith
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Lillian Smith
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Theodore Smith
Head · 1940 · age 40 · b. ~1900 · Pennsylvania
★ 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03407-00330)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret George | 57 | Wife | — | Pennsylvania |
| 2 | Robert P George | 21 | Son | Farmer | Pennsylvania |
| 3 | Joseph George | 20 | Son | Laborer | Pennsylvania |
| 4 | Homer Blystone | 34 | Head | Laborer | Pennsylvania |
| 5 | Nora Blystone | 31 | Wife | — | Pennsylvania |
| 6 | Helen Blystone | 15 | Daughter | — | Pennsylvania |
| 7 | Dorothy Blystone | 13 | Daughter | — | Pennsylvania |
| 8 | Anna Blystone | 10 | Daughter | — | Pennsylvania |
| 9 | Robert Blystone | 8 | Son | — | Pennsylvania |
| 10 | James Blystone | 6 | Son | — | Pennsylvania |
| 11 | Harriet Blystone | 5 | Daughter | — | Pennsylvania |
| 12 | Homer Blystone | 3 | Son | — | Pennsylvania |
| 13 | Raymond Blystone | 1 | Son | — | Pennsylvania |
| 14 | Robert Gibson | 27 | Head | Craneman | Pennsylvania |
| 15 | Emma Jane Gibson | 25 | Wife | — | Pennsylvania |
| 16 | Robert Gibson | 4 | Son | — | Pennsylvania |
| 17 | George Loeffler | 28 | Head | Laborer | Pennsylvania |
| 18 | Beatrice Loeffler | 21 | Wife | — | Pennsylvania |
| 19 | Carolyn Loeffler | 4 | Daughter | — | Pennsylvania |
| 20 | John Hyatt | 42 | Head | Miner | Virginia |
| 21 | Gertrude Hyatt | 40 | Wife | — | West Virginia |
| 22 | Roy Hyatt | 20 | Son | New Hawker | Virginia |
| 23 | Charles Hyatt | 19 | Son | — | West Virginia |
| 24 | Ernest Hyatt | 17 | Son | — | Virginia |
| 25 | Elmer Hyatt | 17 | Son | — | Virginia |
| 26 | Nancy Hyatt | 7 | Daughter | — | West Virginia |
| 27 | Gloria Hyatt | 5 | Daughter | — | Pennsylvania |
| 28 | Theodore Smith THIS PERSON | 40 | Head | Miner | Pennsylvania |
| 29 | Helen Smith | 36 | Wife | — | Pennsylvania |
| 30 | Betty Jane Smith | 18 | Daughter | — | Pennsylvania |
| 31 | Theodore Jr Smith | 13 | Son | — | Pennsylvania |
| 32 | Henry G Lefink | 36 | Head | Optician | Pennsylvania |
| 33 | Mary H Lefink | 36 | Wife | — | Pennsylvania |
| 34 | Eleanor Mae Lefink | 8 | Daughter | — | Pennsylvania |
| 35 | Helen Buckner | 36 | Lodger | — | Pennsylvania |
| 36 | Myrtle Lambert | 57 | Head | — | Pennsylvania |
| 37 | Ernest Lambert | 38 | Son | — | Pennsylvania |
| 38 | Sanford Cooper | 32 | Head | Editor | Michigan |
| 39 | Anna Cooper | 33 | Wife | — | Michigan |
| 40 | Sanford Jr Cooper | 8 | Son | — | Michigan |
Pedigree Summary
Theodore
Gen 1 · 6 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)