MP
Mary Pierce — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Mary Pierce across the 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 8-person household.
Age 12
b. ~1928
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Pierce |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Louisville City |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alma Pierce | Daughter | — | 14 | ~1926 |
| Elizabeth Pierce | Daughter | — | 7 | ~1933 |
| Gertrude Pierce | Daughter | — | 17 | ~1923 |
| Mary Pierce | Daughter | — | 12 | ~1928 |
| Walter Pierce | Head | — | 41 | ~1899 |
| Henry Pierce | Son | — | 18 | ~1922 |
| Robert Pierce | Son | — | 1 | ~1939 |
| Agnes Pierce | Spouse | — | 36 | ~1904 |
Census Appearances
1930
Jefferson, Kentucky
Daughter, age
Jefferson, Kentucky · implied b. ~1930 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Pierce |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Daughter, age 12
Jefferson-County, Kentucky · implied b. ~1928 — 8 household members
| Surname | Pierce |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| 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 Pierce across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Pierce
Daughter · 1940 · age 12 · b. ~1928 · Kentucky
★ You are viewing this record
Sibling
Gertrude Pierce
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Pierce
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alma Pierce
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Pierce
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Pierce
Sibling · 1940 · age 18
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 — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01375-00162)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Delia Kelly | 70 | Head | — | Ireland |
| 2 | John Kelly | 35 | Son | Printer | Kentucky |
| 3 | James Spurling | 44 | Head | Grocery Clerk | Kentucky |
| 4 | Dora Spurling | 39 | Wife | Grocery Clerk | Kentucky |
| 5 | Emma Hook | 52 | Head | — | Indiana |
| 6 | Margaret Hook | 57 | Sister | Saleslady | Indiana |
| 7 | Elizabeth Ackerman | 50 | Head | — | Kentucky |
| 8 | Mary Ackerman | 43 | Sister | Telephone Supervisor | Kentucky |
| 9 | Frank Ackerman | 40 | Brother | Telephone File Clerk | Kentucky |
| 10 | Arthur Glaser | 36 | Head | Salesman | Kentucky |
| 11 | Lillian Glaser | 32 | Wife | Millinery | Kentucky |
| 12 | Arthur Jr. Glaser | 13 | Son | — | Kentucky |
| 13 | Donald Glaser | 7 | Son | — | Kentucky |
| 14 | A. W. Indroit | 50 | Head | Painting Cont. | Kentucky |
| 15 | Mary Indroit | 64 | Sister | — | Kentucky |
| 16 | Carrie Indroit | 54 | Sister | — | Kentucky |
| 17 | Peter Indroit | 45 | Brother | — | Kentucky |
| 18 | Joseph Chigzoin | 40 | Head | Pipe Fitter | Arizona |
| 19 | Elizabeth Chigzoin | 35 | Wife | — | Kentucky |
| 20 | Florence Collins | 54 | Head | — | Kentucky |
| 21 | Mildred Morris | 36 | Daughter | Rag Picker | Kentucky |
| 22 | Doris Kimbel | 6 | Daughter | New Worker | Kentucky |
| 23 | Mary Louise Morris | 3 | Grand daughter | — | Kentucky |
| 24 | Paul Watson | 22 | Head | Driver Truck | Kentucky |
| 25 | Anna Mae Watson | 19 | Wife | — | Kentucky |
| 26 | Paul Watson | 1 | Son | — | Kentucky |
| 27 | Thomas Watson | 23 | Brother | Plasterer | Kentucky |
| 28 | Charles Hayley | 58 | Head | Foundry | Kentucky |
| 29 | Mary A. Hayley | 58 | Wife | — | Kentucky |
| 30 | Joseph A. Hayley | 28 | Son | Foundry | Kentucky |
| 31 | Adolph Schuppert | 64 | Head | Cereal Mill | Indiana |
| 32 | Clara Schuppert | 61 | Wife | — | Kentucky |
| 33 | Walter Pierce | 41 | Head | Laborer | Kentucky |
| 34 | Agnes Pierce | 36 | Wife | — | Kentucky |
| 35 | Henry Pierce | 18 | Son | Laborer | Kentucky |
| 36 | Gertrude Pierce | 17 | Daughter | — | Kentucky |
| 37 | Alma Pierce | 14 | Daughter | — | Kentucky |
| 38 | Mary Pierce THIS PERSON | 12 | Daughter | — | Kentucky |
| 39 | Elizabeth Ann Pierce | 7 | Daughter | — | Kentucky |
| 40 | Robert Pierce | 1 | Son | — | Kentucky |
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)