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Mary Mcclain — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Alabama
Our Model Tree links this Mary Mcclain across the 1930 and 1940 US Censuses in Jefferson-County, Alabama (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 9-person household.
Age 14
b. ~1926
Female
Daughter
Born: Alabama
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Alabama |
| Surname | McClain |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Prec. 57 |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | Prec 57 |
| Est. Birth Year | ~1926 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Robert Mcclain | Son | — | 12 | ~1928 |
| Gail Mcclain | Daughter | — | 1 | ~1939 |
| Doris Mcclain | Daughter | — | 16 | ~1924 |
| Nuel Mcclain | Daughter | — | 6 | ~1934 |
| Ruby Mcclain | Daughter | — | 4 | ~1936 |
| Joyce Mcclain | Daughter | — | 8 | ~1932 |
| John Mcclain | Head | — | 43 | ~1897 |
| Ruby Mcclain | Spouse | — | 38 | ~1902 |
| Mary Mcclain | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Jefferson, Alabama
Daughter, age 4
Jefferson, Alabama · implied b. ~1926 — 15 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McClain |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Jefferson-County, Alabama
Daughter, age 14
Jefferson-County, Alabama · implied b. ~1926 — 9 household members
| Surname | McClain |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | Prec. 57 |
| 1935 Residence (County) | Jefferson |
| Highest Grade | No 7 |
| 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 Mcclain across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcclain
Daughter · 1940 · age 14 · b. ~1926 · Alabama
★ You are viewing this record
Sibling
Doris Mcclain
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcclain
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gail Mcclain
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruby Mcclain
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nuel Mcclain
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joyce Mcclain
Sibling · 1940 · age 8
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 — Jefferson-County, Alabama
Open full size
1940 US Federal Census — Jefferson-County, Alabama
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00047-00577)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anton Crnkovich | 40 | Head | Clerk | Yugoslavia |
| 2 | Justine Crnkovich | 40 | Wife | — | Yugoslavia |
| 3 | Mary Crnkovich | 17 | Daughter | — | Kansas |
| 4 | Anton John Crnkovich | 15 | Son | — | Louisiana |
| 5 | Joseph Ozbault | 51 | Head | Laborer | Yugoslavia |
| 6 | Antonia Ozbault | 42 | Wife | — | Yugoslavia |
| 7 | Ann Ozbault | 23 | Daughter | Laborer | Louisiana |
| 8 | Doris Ozbault | 8 | Daughter | — | Alabama |
| 9 | Thomas D. Pence | 67 | Head | Laborer | Tennessee |
| 10 | Sarah Annie Pence | 63 | Wife | — | Alabama |
| 11 | Jessie Lankford | 28 | Head | Preacher | Alabama |
| 12 | Virginia Lankford | 27 | Wife | — | Alabama |
| 13 | Lennie Lankford | 1 | Daughter | — | Alabama |
| 14 | Nannie Massey | 70 | Head | — | Alabama |
| 15 | Nuel Massey | 47 | Daughter | Teacher | Alabama |
| 16 | John Mcclain | 43 | Head | Truck Driver | Alabama |
| 17 | Ruby Mcclain | 38 | Wife | — | Alabama |
| 18 | Doris Mcclain | 16 | Daughter | — | Alabama |
| 19 | Mary Mcclain THIS PERSON | 14 | Daughter | — | Alabama |
| 20 | Robert Mcclain | 12 | Son | — | Alabama |
| 21 | Joyce Mcclain | 8 | Daughter | — | Alabama |
| 22 | Nuel Mcclain | 6 | Daughter | — | Alabama |
| 23 | Ruby Mcclain | 4 | Daughter | — | Alabama |
| 24 | Gail Mcclain | 1 | Daughter | — | Alabama |
| 25 | Carrie Baskett | 42 | Head | Seamstress | Illinois |
| 26 | Alton Baskett | 18 | Son | — | Alabama |
| 27 | Katie Ann Baskett | 40 | Lodger | — | Alabama |
| 28 | Eugene Baskett | 17 | Lodger | — | Alabama |
| 29 | Velma Vines | 58 | Head | — | Alabama |
| 30 | Melvin Vines | 23 | Son | Miner | Alabama |
| 31 | Edward Vines | 19 | Son | Laborer | Alabama |
| 32 | Charlotte Vines | 10 | Daughter | — | Alabama |
| 33 | Charles Vines | 8 | Son | — | Alabama |
| 34 | Margaret Vines | 6 | Daughter | — | Alabama |
| 35 | Thos Preston | 33 | Head | Electrician | Alabama |
| 36 | Emma Preston | 30 | Wife | — | Alabama |
| 37 | Louise Preston | 6 | Daughter | — | Alabama |
| 38 | Ray Jr Preston | 2 | Son | — | Alabama |
| 39 | Robert Reese | 32 | Head | Laborer | Alabama |
| 40 | Mary Reese | 34 | Wife | — | Alabama |
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)