MW
Mary Willis — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Jefferson, Alabama
Our Model Tree links this Mary Willis across the 1930 and 1940 US Censuses in Jefferson, Alabama (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 8-person household.
Age 42
b. ~1888
Female
Head
Born: Alabama
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Jefferson, Alabama |
| Surname | Willis |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Alabama |
| Age at First Marriage | 20 |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Additional Details | |
| Occupation | Servant |
| Industry | Private home |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 12 |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Occupation | Servant |
| Township / Ward | Birmingham |
| Est. Birth Year | ~1888 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Katherine Willis | Daughter | — | 19 | ~1911 |
| Watress Willis | Daughter | — | 14 | ~1916 |
| Magnolia Willis | Daughter | — | 9 | ~1921 |
| Mary Willis | Head | — | 42 | ~1888 |
| James Willis | Son | — | 16 | ~1914 |
| Jonathan Willis | Son | — | 6 | ~1924 |
| Sam Willis | Son | — | 18 | ~1912 |
| Son Willis | Son | — | 21 | ~1909 |
Census Appearances
1930
Jefferson, Alabama
Head, age 42
Jefferson, Alabama · implied b. ~1888 — 8 household members
| Surname | Willis |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | Black |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Alabama |
| Age at First Marriage | 20 |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Occupation | Servant |
| Industry | Private home |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 12 |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1940
Jefferson-County, Alabama
Other, age 52
Jefferson-County, Alabama · implied b. ~1888 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wills |
| Given Name | Mary |
| Relationship to Head | Servant |
| Sex | F |
| Color / Race | Black |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Alabama |
| 1935 Residence (City) | Birmingham City |
| 1935 Residence (County) | Jefferson |
| Occupation | Servant |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 84 |
| Income (1939) | 520 |
| Highest Grade | G 6 |
| 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 Willis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Willis
Head · 1930 · age 42 · b. ~1888 · Alabama
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Jefferson, Alabama
Open full size
1930 US Federal Census — Jefferson, Alabama
Page Contents
50 people indexed on this census page (ia:1930:15thcensus25usce:0859)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Harris | 22 | Head | Gardner | Georgia |
| 2 | Livonia Harris | 19 | Wife | — | Georgia |
| 3 | Jessie Thomas | 31 | Head | Laundryman | Georgia |
| 4 | Homer Ferguson | 22 | Brother | Deliveryman | Georgia |
| 5 | Hester Ferguson | 24 | Sister | — | Georgia |
| 6 | Joe Mackey | 46 | Lodger | Gardner | Alabama |
| 7 | Christina Ferguson | 4 | Niece | — | Georgia |
| 8 | Willie Washington | 60 | Head | Servant | Alabama |
| 9 | Ella Washington | 53 | Wife | Laundrywork | Alabama |
| 10 | Adella Crawford | 31 | Daughter | Servant | Alabama |
| 11 | Polly Washington | 17 | Daughter | — | Alabama |
| 12 | Florence Williams | 24 | Head | Laundress | Alabama |
| 13 | Mango Casey | 27 | Lodger | Truck Driver | South Carolina |
| 14 | Charlie Sommerfield | 58 | Head | Laborer | Georgia |
| 15 | Hardee Sommerfield | 21 | Son | Laborer | Alabama |
| 16 | Grace Sommerfield | 16 | Daughter | — | Alabama |
| 17 | Charles Sommerfield | 14 | Son | — | Alabama |
| 18 | Claire Sommerfield | 11 | Daughter | — | Alabama |
| 19 | Brazzy Sommerfield | 9 | Son | — | Alabama |
| 20 | Harry Sommerfield | 6 | Son | — | Alabama |
| 21 | Harry Powers | 38 | Lodger | Servant | Alabama |
| 22 | Powers | 6 | Lodger | — | Alabama |
| 23 | Healey Purefoil | 55 | Head | Laborer | Alabama |
| 24 | Shelva Purefoil | 41 | Wife | — | Alabama |
| 25 | Mozetta Wilder | 23 | Daughter | Laundress | Alabama |
| 26 | Charles Wilder | 26 | Son-in-law | Chauffeur | Alabama |
| 27 | Lillian Hayes | 6 | Granddaughter | — | Alabama |
| 28 | Jessie Combs | 55 | Head | Sand Cutter | Alabama |
| 29 | Myra Bowman | 40 | Head | Servant | Alabama |
| 30 | Belle Bowman | 35 | Wife | Laundrywork | Alabama |
| 31 | Willie Olds | 47 | Lodger | Laborer | Alabama |
| 32 | Ivy Olds | 16 | Lodger | — | Alabama |
| 33 | Sully Olds | 14 | Lodger | — | Alabama |
| 34 | Mary Olds | 12 | Lodger | — | Alabama |
| 35 | Daisy Olds | 46 | Lodger | — | Alabama |
| 36 | George Alexander | 42 | Head | Boilermaker | Mississippi |
| 37 | Nellie Alexander | 34 | Wife | Servant | Mississippi |
| 38 | Jannie Glover | 25 | Nephew | Laborer | Mississippi |
| 39 | Sol Bray | 54 | Head | Laborer | Alabama |
| 40 | Fannie Bray | 52 | Wife | Laundrywork | Alabama |
| 41 | Mary Willis THIS PERSON | 42 | Head | Servant | Alabama |
| 42 | Son Willis | 21 | Son | Yard Man | Alabama |
| 43 | Katherine Willis | 19 | Daughter | Servant | Alabama |
| 44 | Sam Willis | 18 | Son | — | Alabama |
| 45 | James Willis | 16 | Son | — | Alabama |
| 46 | Watress Willis | 14 | Daughter | — | Alabama |
| 47 | Magnolia Willis | 9 | Daughter | — | Alabama |
| 48 | Jonathan Willis | 6 | Son | — | Alabama |
| 49 | Arthur Dorn | 44 | Head | Salesman | Alabama |
| 50 | Calla Dorn | 38 | Wife | — | Lithuania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)