MH
Mary Harper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Mary Harper across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a spouse (b.~1911), then head of a 5-person household.
Age 29
b. ~1911
Female
Spouse
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Harper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1911 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Frank Harper | Head | — | 35 | ~1905 |
| Walter Lamm | Other | — | 36 | ~1904 |
| Charles Harper | Son | — | 13 | ~1927 |
| Eugene Harper | Son | — | 14 | ~1926 |
| Mary Harper | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Jefferson, Kentucky
Other, age 8
Jefferson, Kentucky · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Mary F. |
| Relationship to Head | Step-daughter |
| Sex | F |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Other, age 19
Jefferson, Kentucky · implied b. ~1911 — 19 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Madie |
| Relationship to Head | Lodger |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Spouse, age 29
Jefferson-County, Kentucky · implied b. ~1911 — 5 household members
| Surname | Harper |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Highest Grade | No 8 |
| 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 Harper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Harper
Spouse · 1940 · age 29 · b. ~1911 · Kentucky
★ You are viewing this record
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-t0627-01376-00712)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles L. Reeves | 27 | Head | Laborer | Tennessee |
| 2 | Mary Reeves | 25 | Wife | Clerk | Georgia |
| 3 | Jean A. Reeves | 2 | Daughter | — | Kentucky |
| 4 | Herbert W. German | 35 | Head | Porter | Kentucky |
| 5 | Johnell German | 32 | Wife | Housekeeper | Kentucky |
| 6 | Katie M. German | 15 | Daughter | — | Kentucky |
| 7 | Herbert C. German | 6 | Son | — | Kentucky |
| 8 | Katie M. Cottrell | 62 | Mother-in-law | — | Kentucky |
| 9 | Robert B. Morris | 44 | Head | Laborer | Kentucky |
| 10 | Cordia L. Morris | 39 | Wife | Domestic | Kentucky |
| 11 | Lily Waterfield | 35 | Sister-in-law | Domestic | Kentucky |
| 12 | Mary Wood | 48 | Head | Clerk | Kentucky |
| 13 | Pauline Wood | 21 | Daughter | Secretary | Kentucky |
| 14 | Coleman Bass | 35 | Head | Proprietor | Russia |
| 15 | Gertrude Bass | 33 | Wife | Clerk | Russia |
| 16 | George W. Pratt | 59 | Head | Finisher | Indiana |
| 17 | Eppa Pratt | 65 | Wife | — | Indiana |
| 18 | John E. Bills | 68 | Head | — | Pennsylvania |
| 19 | Catherine E. Bills | 55 | Wife | — | Indiana |
| 20 | Henry Bills | 65 | Brother | — | Pennsylvania |
| 21 | Edwin J. Dusch | 50 | Head | Clerk | Kentucky |
| 22 | Bertha A. Dusch | 46 | Wife | — | Kentucky |
| 23 | Emma C. Dusch | 20 | Daughter | Clerk | Kentucky |
| 24 | Nettie M. Althauser | 63 | Head | — | Ohio |
| 25 | Minnie Althauser | 46 | Sister | Stenographer | Ohio |
| 26 | Anna M. Mckeldin | 68 | Sister | — | Ohio |
| 27 | Fred C. Althauser | 71 | Brother | Distiller | Ohio |
| 28 | Susan Althauser | 69 | Sister-in-law | — | Pennsylvania |
| 29 | Raymond M. Fogarty | 46 | Head | Machinist | Indiana |
| 30 | Ruth M. Fogarty | 44 | Wife | — | Indiana |
| 31 | Virginia A. Fogarty | 21 | Daughter | Clerk | Indiana |
| 32 | John R. Fogarty | 20 | Son | Apprentice Machinist | Indiana |
| 33 | Raymond F. Fogarty | 18 | Son | Apprentice Machinist | Indiana |
| 34 | Mary R. Fogarty | 14 | Daughter | — | Indiana |
| 35 | Frank Harper | 35 | Head | Maintenance Man | Kentucky |
| 36 | Mary Harper THIS PERSON | 29 | Wife | — | Kentucky |
| 37 | Eugene E. Harper | 14 | Son | — | Kentucky |
| 38 | Charles E. Harper | 13 | Son | — | Kentucky |
| 39 | Walter Lamm | 36 | Brother-in-law | Stenciller | Kentucky |
| 40 | Noah F. Elbert | 59 | Head | Motorman | Indiana |
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)