MD
Mary Davis — 1930 US Census Record
Model Tree available1930 United States Federal Census · Mobile, Alabama
Our Model Tree links this Mary Davis across the 1910, 1920 and 1930 US Censuses in Mobile, Alabama (XGBoost, ~Confirmed), with identified parents Robert & Mattie — first a daughter (b.~1904), then head of a 4-person household.
Age 26
b. ~1904
Female
Daughter
Born: Alabama
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Mobile, Alabama |
| Surname | Davis |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Alabama |
| Age at First Marriage | 18 |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Additional Details | |
| Occupation | Maid |
| Industry | Private family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Occupation | Maid |
| Township / Ward | Mobile City |
| Est. Birth Year | ~1904 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Davis | Daughter | — | 26 | ~1904 |
| Robert Knight | Head | — | 50 | ~1880 |
| Marian Davis | Other | — | 9 | ~1921 |
| Mattie Knight | Spouse | — | 37 | ~1893 |
Census Appearances
1910
Mobile, Alabama
Other, age 4
Mobile, Alabama · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Marie |
| Relationship to Head | Granddaughter |
| Sex | F |
| Color / Race | Black |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Can Read | No |
| Can Write | No |
| Speaks English | English |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1920
Mobile, Alabama
Other, age 15
Mobile, Alabama · implied b. ~1905 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Mary |
| Relationship to Head | Step daughter |
| Sex | F |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Speaks English | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1930
Mobile, Alabama
Daughter, age 26
Mobile, Alabama · implied b. ~1904 — 4 household members
| Surname | Davis |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Alabama |
| Age at First Marriage | 18 |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Occupation | Maid |
| Industry | Private family |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Davis across 3 US Census years (1910, 1920 and 1930) in Mobile, Alabama, using XGBoost record linkage. Identified parents: father Robert Knight (~0.92 confidence) and mother Mattie Knight (~0.60 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.76
Father
Robert Knight
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Mattie Knight
b. ~1893
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Mary Davis
Daughter · 1930 · age 26 · b. ~1904 · Alabama
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Mobile, Alabama
Open full size
1930 US Federal Census — Mobile, Alabama
Page Contents
50 people indexed on this census page (ia:1930:15thcensus41usce:1020)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Henry Evans | 16 | Roomer | Laborer | Alabama |
| 52 | John Evans | 52 | Roomer | Laborer | Alabama |
| 53 | Pearl Harris | 34 | Head | — | Alabama |
| 54 | Rose E. Harris | 21 | Daughter | Laborer | Alabama |
| 55 | Edna R. Harris | 19 | Daughter | — | Alabama |
| 56 | Randolph Harris | 17 | Son | Boot Black | Alabama |
| 57 | Herbert Harris | 15 | Son | — | Alabama |
| 58 | Andrew J. Harris | 12 | Son | — | Alabama |
| 59 | Amanda Harris | 10 | Daughter | — | Alabama |
| 60 | Sarah Green | 50 | Uncle | Laborer | Alabama |
| 61 | Louis Perez | 52 | Head | Proprietor | Spain |
| 62 | Marietta Perez | 33 | Wife | — | Alabama |
| 63 | Emanuel Perez | 14 | Son | — | Alabama |
| 64 | William Perez | 12 | Son | — | Alabama |
| 65 | Rose F. Perez | 11 | Daughter | — | Alabama |
| 66 | Joseph Perez | 10 | Son | — | Alabama |
| 67 | Mary J. Perez | 8 | Daughter | — | Alabama |
| 68 | Esperanza Moll | 61 | Mother-in-law | — | Spain |
| 69 | Rosie Young | 43 | Head | Cook | Alabama |
| 70 | Pamelia Morgan | 26 | Daughter | Cook | Alabama |
| 71 | Mildred Read | 21 | Daughter | Maid | Alabama |
| 72 | Theresa Read | 19 | Daughter | Maid | Alabama |
| 73 | Lemuel Read | 17 | Son | Delivery Boy | Alabama |
| 74 | Willie Mixons | 16 | Roomer | Delivery Boy | Alabama |
| 75 | Rosalie Freeman | 4 | Grand-son | — | Alabama |
| 76 | Ethel Wetherbee | 3 | Grand-son | — | Alabama |
| 77 | Robert Knight | 29 | Head | Porter | Louisiana |
| 78 | Mary Knight | 25 | Wife | — | Alabama |
| 79 | Alf Williams | 39 | Roomer | Sawyer | Alabama |
| 80 | Annie Russ | 21 | Roomer | Flunkey | Alabama |
| 81 | George Brown | 23 | Roomer | Boot Black | Alabama |
| 82 | Robert Knight | 50 | Head | Laborer | Alabama |
| 83 | Mattie Knight | 37 | Wife | — | Alabama |
| 84 | Mary Davis THIS PERSON | 26 | Daughter | Maid | Alabama |
| 85 | Marian Davis | 9 | Grand-daughter | — | Alabama |
| 86 | Joseph V. Cornish | 52 | Head | Butcher | Alabama |
| 87 | Mary Cornish | 48 | Wife | — | Alabama |
| 88 | Margaret Cornish | 18 | Daughter | — | Alabama |
| 89 | Vera Cornish | 15 | Daughter | — | Alabama |
| 90 | John Cornish | 11 | Son | — | Alabama |
| 91 | Joseph Cornish | 8 | Son | — | Alabama |
| 92 | Mary Cronin | 76 | Head | — | Alabama |
| 93 | Edward J. Cronin | 55 | Son | Clerk | Alabama |
| 94 | Charles W. Morrison | 48 | Head | Machinist | Alabama |
| 95 | Annie C. Morrison | 45 | Wife | — | Alabama |
| 96 | Edward W. Brandon | 44 | Head | In Charge | Alabama |
| 97 | Gloria Brandon | 33 | Wife | — | Alabama |
| 98 | Jimmy L. Bulger | 18 | Step-son | Bell Man | Alabama |
| 99 | Amanda Reed | 65 | Mother-in-law | — | Alabama |
| 100 | Louey Reed | 37 | Brother-in-law | Porter | Alabama |
Pedigree Summary
Mary
Gen 1 · 2 parents
~0.76
Max depth 4 (1900–1950 window)
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)