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Mary Alexander — 1940 US Census Record
Model Tree available1940 United States Federal Census · East-Baton-Rouge-County, Louisiana
Our Model Tree links this Mary Alexander across the 1920, 1930 and 1940 US Censuses in East-Baton-Rouge-County, Louisiana (XGBoost, ~Confirmed), with identified parents Tom & Angeline — first a spouse (b.~1912), then head of a 7-person household.
Age 28
b. ~1912
Female
Spouse
Born: Louisiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | East-Baton-Rouge-County, Louisiana |
| Surname | Alexander |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Louisiana |
| 1935 Residence (City) | Ward 3 |
| 1935 Residence (County) | East Baton Rouge |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Township / Ward | Ward 3 |
| Est. Birth Year | ~1912 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Gloria Alexander | Daughter | — | 8 | ~1932 |
| Doris Alexander | Daughter | — | 5 | ~1935 |
| Preston Alexander | Head | — | 39 | ~1901 |
| Preston Alexander | Son | — | 14 | ~1926 |
| Felton Alexander | Son | — | 10 | ~1930 |
| Clifton Alexander | Son | — | 12 | ~1928 |
| Mary Alexander | Spouse | — | 28 | ~1912 |
Census Appearances
1920
East Baton …
Daughter, age 9
East Baton Rouge, Louisiana · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1930
East Baton …
Daughter, age 18
East Baton Rouge, Louisiana · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read/Write | Yes |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1940
East-Baton-Rouge-County, Louisiana
Spouse, age 28
East-Baton-Rouge-County, Louisiana · implied b. ~1912 — 7 household members
| Surname | Alexander |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Louisiana |
| 1935 Residence (City) | Ward 3 |
| 1935 Residence (County) | East Baton Rouge |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
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 Alexander across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Tom Alexander (~0.92 confidence) and mother Angeline Alexander (~0.92 confidence) and mother Josephine Alexander (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Tom Alexander
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Angeline Alexander
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Josephine Alexander
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Alexander
Spouse · 1940 · age 28 · b. ~1912 · Louisiana
★ 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 — East-Baton-Rouge-County, Louisiana
Open full size
1940 US Federal Census — East-Baton-Rouge-County, Louisiana
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01397-00176)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy Harris | 25 | Daughter | Maid | Louisiana |
| 2 | Emma Harris | 20 | Daughter | Maid | Louisiana |
| 3 | David Harris | 17 | Son | Delivery Boy | Louisiana |
| 4 | Mary Harris | 15 | Daughter | — | Louisiana |
| 5 | Sam Harris | 11 | Son | — | Louisiana |
| 6 | John D. Coleman | 4 | Grandson | — | Louisiana |
| 7 | Preston Alexander | 39 | Head | Proprietor | Louisiana |
| 8 | Mary Alexander THIS PERSON | 28 | Wife | — | Louisiana |
| 9 | Preston Jr. Alexander | 14 | Son | — | Louisiana |
| 10 | Clifton Alexander | 12 | Son | — | Louisiana |
| 11 | Felton Alexander | 10 | Son | — | Louisiana |
| 12 | Gloria Alexander | 8 | Daughter | — | Louisiana |
| 13 | Doris Alexander | 5 | Daughter | — | Louisiana |
| 14 | Jim Anderson | 65 | Head | Laborer | Louisiana |
| 15 | Sarah Anderson | 60 | Wife | — | Louisiana |
| 16 | Willie Anderson | 52 | Son | — | Louisiana |
| 17 | Estelle Anderson | 36 | Daughter | — | Louisiana |
| 18 | Melania Anderson | 17 | Granddaughter | — | Louisiana |
| 19 | Celina Williams | 19 | Daughter | — | Louisiana |
| 20 | Joseph Smith | 11 | Grandson | — | Louisiana |
| 21 | Haley Premier | 64 | Lodger | — | Louisiana |
| 22 | Percy Morris | 54 | Head | — | Mississippi |
| 23 | Eliza Morris | 51 | Wife | — | Mississippi |
| 24 | Booker T. Washington | 39 | Head | Laborer | Louisiana |
| 25 | Beatrice Washington | 31 | Wife | — | Louisiana |
| 26 | Betty Jean Washington | 7 | Daughter | — | Louisiana |
| 27 | Shirley Mae Washington | 5 | Daughter | — | Louisiana |
| 28 | George Fluker | 46 | Head | Proprietor Wood Yard | Louisiana |
| 29 | Francis Fluker | 46 | Wife | Maid | Louisiana |
| 30 | Dorothy Fluker | 14 | Daughter | — | Louisiana |
| 31 | Kitty Pete | 66 | Mother-in-law | — | Louisiana |
| 32 | Charley Willis | 39 | Head | Yard Man | Mississippi |
| 33 | Janis Willis | 38 | Wife | Maid | Louisiana |
| 34 | Marie Rogers | 12 | Daughter | — | Louisiana |
| 35 | James Rogers | 11 | Son | — | Louisiana |
| 36 | Willie Johnson | 38 | Head | Baker | Louisiana |
| 37 | Georgia Johnson | 32 | Wife | Maid | Louisiana |
| 38 | James Johnson | 15 | Son | — | Louisiana |
| 39 | Lou Duffin | 58 | Mother | — | Louisiana |
Pedigree Summary
Mary
Gen 1 · 3 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)