MJ
Mary Jennings — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Calhoun-County, Alabama
Our Model Tree links this Mary Jennings across the 1930 and 1940 US Censuses in Calhoun-County, Alabama (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 12-person household.
Age 12
b. ~1928
Female
Daughter
Born: Alabama
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Calhoun-County, Alabama |
| Surname | Jennings |
| Given Name | Mary Ollie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Calhoun |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Alabama |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | Election Precinct 22 Wellington |
| Est. Birth Year | ~1928 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alice Jennings | Daughter | — | ~1940 | |
| Joyce Jennings | Daughter | — | 14 | ~1926 |
| Julia Jennings | Daughter | — | 4 | ~1936 |
| Mary Jennings | Daughter | — | 12 | ~1928 |
| Margaret Jennings | Daughter | — | 7 | ~1933 |
| Frances Jennings | Daughter | — | 19 | ~1921 |
| Thelma Jennings | Daughter | — | 16 | ~1924 |
| Jack Jennings | Daughter | — | 10 | ~1930 |
| Thomas Jennings | Head | — | 44 | ~1896 |
| Jerry Jennings | Son | — | 2 | ~1938 |
| Thomas Jennings | Son | — | 18 | ~1922 |
| Ona Jennings | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Calhoun, Alabama
Daughter, age 2
Calhoun, Alabama · implied b. ~1928 — 14 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jennings |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Calhoun-County, Alabama
Daughter, age 12
Calhoun-County, Alabama · implied b. ~1928 — 12 household members
| Surname | Jennings |
| Given Name | Mary Ollie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Alabama |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Calhoun |
| Highest Grade | No 4 |
| 1935 Residence | Alabama |
| 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 Jennings across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Jennings
Daughter · 1940 · age 12 · b. ~1928 · Alabama
★ You are viewing this record
Sibling
Thelma Jennings
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Jennings
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joyce Jennings
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jack Jennings
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Jennings
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerry Jennings
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Jennings
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Jennings
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Jennings
Sibling · 1940 · age 4
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 — Calhoun-County, Alabama
Open full size
1940 US Federal Census — Calhoun-County, Alabama
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00009-00998)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Aerus Crook | 45 | Head | Farmer | Alabama |
| 2 | Carrie Crook | 42 | Wife | Housekeeper | Alabama |
| 3 | Aerus Jr. Crook | 20 | Son | Laborer | Alabama |
| 4 | Gladys Crook | 18 | Daughter | New Worker | Alabama |
| 5 | James Crook | 16 | Son | Laborer | Alabama |
| 6 | Millidge Crook | 13 | Son | — | Alabama |
| 7 | Nathaniel Crook | 10 | Son | — | Alabama |
| 8 | Delois Crook | 5 | Daughter | — | Alabama |
| 9 | Thomas Jennings | 44 | Head | Farmer | Alabama |
| 10 | Ona Jennings | 39 | Wife | Housekeeper | Alabama |
| 11 | Frances Jennings | 19 | Daughter | — | Alabama |
| 12 | Thomas Jr. Jennings | 18 | Son | — | Alabama |
| 13 | Thelma Jennings | 16 | Daughter | — | Alabama |
| 14 | Joyce Jennings | 14 | Daughter | — | Alabama |
| 15 | Mary Ollie Jennings THIS PERSON | 12 | Daughter | — | Alabama |
| 16 | Jack Jennings | 10 | Daughter | — | Alabama |
| 17 | Margaret Jennings | 7 | Daughter | — | Alabama |
| 18 | Julia Mae Jennings | 4 | Daughter | — | Alabama |
| 19 | Jerry Jennings | 2 | Son | — | Alabama |
| 20 | Alice Faye Jennings | 0 | Daughter | — | Alabama |
| 21 | Bennie Peters | 49 | Head | Farmer | Alabama |
| 22 | Benjamin Peters | 20 | Son | Laborer | Alabama |
| 23 | Edward Peters | 17 | Son | Laborer | Alabama |
| 24 | Juanita Peters | 14 | Daughter | Laborer | Alabama |
| 25 | Willie Peters | 12 | Son | — | Alabama |
| 26 | Katharine Peters | 9 | Daughter | — | Alabama |
| 27 | Charlee Peters | 5 | Son | — | Alabama |
| 28 | Pat Mc Ginnis | 61 | Head | Night Watchman | Alabama |
| 29 | Annie Mc Ginnis | 54 | Wife | Housekeeper | Alabama |
| 30 | Ethel Mc Ginnis | 19 | Daughter | Housekeeper | Alabama |
| 31 | Norman Mc Ginnis | 15 | Son | — | Alabama |
| 32 | Walter Rollins | 25 | Son-in-law | Farmer | Alabama |
| 33 | Lorella Rollins | 17 | Daughter | Housekeeper | Alabama |
| 34 | Carol Rollins | 0 | Daughter | — | Alabama |
| 35 | Hugh S. Reed | 63 | Head | Farmer | Alabama |
| 36 | Dora Reed | 22 | Daughter | Teacher | Alabama |
| 37 | Frances Reed | 20 | Daughter | — | Alabama |
| 38 | Homer Mc Kerley | 27 | Head | Farmer | Alabama |
| 39 | Mary C. Mc Kerley | 28 | Wife | Housekeeper | Alabama |
| 40 | Marvin L. Owens | 23 | Head | Farmer | Alabama |
Related Census Records
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)