MJ
Mary Johns — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Jefferson, Kentucky
Our Model Tree links this Mary Johns across the 1930 and 1940 US Censuses in Jefferson, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 9-person household.
Age 8
b. ~1922
Female
Daughter
Born: Kentucky
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Jefferson, Kentucky |
| Surname | Johns |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1922 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Johns | Daughter | — | 8 | ~1922 |
| Blanche Johns | Son | — | 2 | ~1928 |
| Sarah Johns | Daughter | — | 5 | ~1925 |
| Lucile Johns | Daughter | — | 9 | ~1921 |
| Hilda Johns | Daughter | — | 6 | ~1924 |
| Edith Johns | Daughter | — | 15 | ~1915 |
| Jack Johns | Daughter | — | 3 | ~1927 |
| Pauline Johns | Daughter | — | 13 | ~1917 |
| Arthur Johns | Head | — | 40 | ~1890 |
Census Appearances
1930
Jefferson, Kentucky
Daughter, age 8
Jefferson, Kentucky · implied b. ~1922 — 9 household members
| Surname | Johns |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Daughter, age 18
Jefferson-County, Kentucky · implied b. ~1922 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | John |
| Given Name | Madeline B. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Occupation | Operator |
| Industry | Beauty Parlor |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 700 |
| Highest Grade | No H2 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 Johns across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Johns
Daughter · 1930 · age 8 · b. ~1922 · Kentucky
★ You are viewing this record
Sibling
Jack Johns
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Pauline Johns
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucile Johns
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hilda Johns
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edith Johns
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Johns
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Blanche Johns
Sibling · 1930 · age 2
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
1930 US Federal Census — Jefferson, Kentucky
Open full size
1930 US Federal Census — Jefferson, Kentucky
Page Contents
25 people indexed on this census page (ia:1930:kentuckycensus00reel760:0373)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Arthur T Johns | 40 | Head | Engine Wiper | Maryland |
| 52 | Edith Johns | 15 | Daughter | — | Maryland |
| 53 | Pauline Johns | 13 | Daughter | — | Kentucky |
| 54 | Lucile Johns | 9 | Daughter | — | Kentucky |
| 55 | Mary Johns THIS PERSON | 8 | Daughter | — | Kentucky |
| 56 | Hilda Johns | 6 | Daughter | — | Kentucky |
| 57 | Sarah Johns | 5 | Daughter | — | Kentucky |
| 58 | Jack Johns | 3 | Daughter | — | Kentucky |
| 59 | Blanche Johns | 2 | Son | — | Kentucky |
| 60 | James Metcalf | 39 | Head | Truck Driver | Kentucky |
| 61 | Thomas Metcalf | 38 | Wife | — | Kentucky |
| 62 | James Metcalf | 11 | Son | — | Kentucky |
| 63 | Hattie Metcalf | 10 | Daughter | — | Kentucky |
| 64 | Fred E Metcalf | 9 | Son | — | Kentucky |
| 65 | Luther Bailey | 47 | Head | Hod Carrier | Kentucky |
| 66 | Nellie Bailey | 46 | Wife | — | Kentucky |
| 67 | John Bailey | 17 | Son | Laborer | Kentucky |
| 68 | Gilrey Taylor | 45 | Head | Laborer | Kentucky |
| 69 | Regina Taylor | 42 | Wife | — | Kentucky |
| 70 | Will B Williams | 30 | Nephew | Porter | Kentucky |
| 71 | Frances Washington | 65 | Aunt | — | Kentucky |
| 72 | Thomas Slaughter | 42 | Roomer | Laborer | Kentucky |
| 73 | Eva Gray | 29 | Roomer | Servant | Tennessee |
| 74 | Percy W Washington | 56 | Head | Laborer | Kentucky |
| 75 | Wanda Washington | 54 | Wife | — | Kentucky |
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)