MS
Mary Smith — 1940 US Census Record
Model Tree available1940 United States Federal Census · Butler-County, Alabama
Our Model Tree links this Mary Smith across the 1920, 1930 and 1940 US Censuses in Butler-County, Alabama (XGBoost, ~Confirmed), with identified parents John & J — first a daughter (b.~1910), then head of a 6-person household.
Age 30
b. ~1910
Female
Daughter
Born: Alabama
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Butler-County, Alabama |
| Surname | Smith |
| Given Name | Mary Belle |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | division 12 |
| 1935 Residence (County) | Butler |
| Additional Details | |
| Occupation | Bookkeeper & Stenographer |
| Industry | Butler County Whse. |
| Class of Worker | PW |
| Income (1939) | 600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Occupation | Bookkeeper & Stenographer |
| Township / Ward | Division 12 |
| Est. Birth Year | ~1910 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Abbie Smith | Daughter | — | 15 | ~1925 |
| Nellie Smith | Daughter | — | 17 | ~1923 |
| Mary Smith | Daughter | — | 30 | ~1910 |
| Charlie Smith | Head | — | 54 | ~1886 |
| Beulah Smith | Other | — | 26 | ~1914 |
| Thomas Smith | Son | — | 33 | ~1907 |
Census Appearances
1920
Butler, Alabama
Daughter, age 10
Butler, Alabama · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Mary Belle |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1930
Butler, Alabama
Daughter, age 20
Butler, Alabama · implied b. ~1910 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Smith |
| Given Name | Mary Belle |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Can Read/Write | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Butler-County, Alabama
Daughter, age 30
Butler-County, Alabama · implied b. ~1910 — 6 household members
| Surname | Smith |
| Given Name | Mary Belle |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | division 12 |
| 1935 Residence (County) | Butler |
| Occupation | Bookkeeper & Stenographer |
| Industry | Butler County Whse. |
| Class of Worker | PW |
| Income (1939) | 600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 Mary Smith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Smith (~0.92 confidence) and father J Smith (~0.92 confidence) and father Charlie Smith (~0.92 confidence) and mother Pearlie Smith (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Smith
b. ~1879
Source father
● Household
· direct · ~0.92
Father
J Smith
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Charlie Smith
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Pearlie Smith
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Smith
Daughter · 1940 · age 30 · b. ~1910 · Alabama
★ You are viewing this record
Sibling
Abbie Smith
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Smith
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nellie Smith
Sibling · 1940 · age 17
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 — Butler-County, Alabama
Open full size
1940 US Federal Census — Butler-County, Alabama
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00007-00521)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary S. Conti | 54 | Wife | — | Alabama |
| 42 | Bill Conti | 21 | Son | Farm Laborer | Alabama |
| 43 | Emmett A. Conti | 18 | Son | Laborer | Alabama |
| 44 | Elizabeth Gregory | 18 | Daughter | — | Alabama |
| 45 | Dave Ruffing | 46 | Head | Farmer | Alabama |
| 46 | Lyla Mae Ruffing | 35 | Wife | — | Alabama |
| 47 | Lonnie Ruffing | 21 | Daughter | Laborer | Alabama |
| 48 | Annie Bell Ruffing | 19 | Daughter | — | Alabama |
| 49 | Norman Ruffing | 17 | Son | Laborer | Alabama |
| 50 | Willie Helen Ruffing | 15 | Daughter | — | Alabama |
| 51 | James W. Ruffing | 14 | Son | Laborer | Alabama |
| 52 | Frances L. Ruffing | 8 | Daughter | — | Alabama |
| 53 | Eva Pearl Ruffing | 6 | Daughter | — | Alabama |
| 54 | David Lee Ruffing | 3 | Son | — | Alabama |
| 55 | Eulice R. Lawrence | 29 | Head | Laborer | Alabama |
| 56 | Flora Lawrence | 25 | Wife | — | Alabama |
| 57 | Wynette Lawrence | 1 | Daughter | — | Alabama |
| 58 | William J. Lawrence | 73 | Father | — | Alabama |
| 59 | Robert H. Smith | 26 | Head | Bus Driver | Alabama |
| 60 | Robie Smith | 21 | Wife | — | Alabama |
| 61 | Merton C. Griffin | 31 | Head | Bus Driver | Alabama |
| 62 | Edna Griffin | 31 | Wife | — | Alabama |
| 63 | Raymond Griffin | 8 | Son | — | Alabama |
| 64 | Lottie Bell Griffin | 6 | Daughter | — | Alabama |
| 65 | Virginia Griffin | 4 | Daughter | — | Alabama |
| 66 | James Russell | 28 | Head | Laborer | Alabama |
| 67 | Willie J. Russell | 24 | Wife | — | Alabama |
| 68 | Sylvia Joyce Russell | 2 | Daughter | — | Alabama |
| 69 | Charlie M. Smith | 54 | Head | Farm Operator | Alabama |
| 70 | Thomas G. Smith | 33 | Son | Farm Laborer | Alabama |
| 71 | Beulah C. Smith | 26 | In-law | Waitress | Alabama |
| 72 | Mary Belle Smith THIS PERSON | 30 | Daughter | Bookkeeper & Stenographer | Alabama |
| 73 | Nellie Smith | 17 | Daughter | Clerk | Alabama |
| 74 | Abbie Sue Smith | 15 | Daughter | — | Alabama |
| 75 | Ollie Mathews | 31 | Head | Laborer | Alabama |
| 76 | Addie Mathews | 27 | Wife | Laborer | Alabama |
| 77 | Willie J. Mathews | 10 | Son | — | Alabama |
| 78 | Emma L. Mathews | 7 | Daughter | — | Alabama |
| 79 | Bettie Joe Mathews | 5 | Daughter | — | Alabama |
| 80 | Mabel Brown | 24 | Head | Laborer | Alabama |
Pedigree Summary
Mary + 3 siblings
Gen 1 · 4 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)