MC
Martha Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Martha Cooper across the 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Yes 7 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1927 |
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 Martha | Age | Birth yr |
|---|---|---|---|---|
| Frances Cooper | Daughter | — | 19 | ~1921 |
| Richard Cooper | Son | — | 1 | ~1939 |
| Hazel Cooper | Spouse | — | 46 | ~1894 |
| Mary Cooper | Daughter | — | 17 | ~1923 |
| Charles Cooper | Head | — | 52 | ~1888 |
| Charles Cooper | Son | — | 15 | ~1925 |
| Martha Cooper | Daughter | — | 13 | ~1927 |
| Robert Cooper | Son | — | 7 | ~1933 |
Census Appearances
1930
Jefferson, Kentucky
Daughter, age 3
Jefferson, Kentucky · implied b. ~1927
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Ohio |
| Can Read/Write | No |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Jefferson-County, Kentucky
Daughter, age 13
Jefferson-County, Kentucky · implied b. ~1927 — 8 household members
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Louisville City |
| 1935 Residence (County) | Jefferson |
| Income (1939) | 0 |
| Highest Grade | Yes 7 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Martha Cooper across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Martha Cooper
Daughter · 1940 · age 13 · b. ~1927 · Kentucky
★ You are viewing this record
Sibling
Robert Cooper
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Cooper
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Cooper
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Cooper
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Cooper
Sibling · 1940 · age 1
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-t0627-01366-00035)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | May | 48 | Wife | — | Kentucky |
| 42 | Mary C May | 23 | Daughter | Stenographer | Kentucky |
| 43 | Mayme Allen | 60 | Sister-in-law | — | Kentucky |
| 44 | Nettie E Cornell | 67 | Head | — | Kentucky |
| 45 | Irving Walker | 46 | Lodger | Lawyer | Missouri |
| 46 | Mary E Ruddy | 75 | Head | — | Kentucky |
| 47 | Charles E Ruddy | 54 | Brother | Traffic Manager | Kentucky |
| 48 | Hattie Ruddy | 40 | Wife | Machine Operator | Kentucky |
| 49 | Jean Ruddy | 13 | Daughter | — | Kentucky |
| 50 | Viola M Lanning | 48 | Head | Contact Man | Kansas |
| 51 | Mona M Lanning | 39 | Wife | — | Kentucky |
| 52 | John D Reardon | 61 | Head | Factory Machine | Kentucky |
| 53 | Mary A Reardon | 61 | Wife | — | Kentucky |
| 54 | Charles W Cooper | 52 | Head | Salesman | Kentucky |
| 55 | Hazel M Cooper | 46 | Wife | — | Ohio |
| 56 | Frances Cooper | 19 | Daughter | Stenographer | Kentucky |
| 57 | Mary E Cooper | 17 | Daughter | — | Kentucky |
| 58 | Charles W Jr Cooper | 15 | Son | — | Kentucky |
| 59 | Martha Cooper THIS PERSON | 13 | Daughter | — | Ohio |
| 60 | Robert Cooper | 7 | Son | — | Kentucky |
| 61 | Richard Cooper | 1 | Son | — | Kentucky |
| 62 | Samuel I Speevack | 44 | Head | Proprietor | Kentucky |
| 63 | Ruth A Speevack | 45 | Wife | Clerk | Russia |
| 64 | Raymond W Conner | 53 | Head | Salesman | Kentucky |
| 65 | Elvira Conner | 50 | Wife | Manager | Indiana |
| 66 | Elvira A Conner | 17 | Daughter | Stenographer | Kentucky |
| 67 | Betty R Conner | 15 | Daughter | — | Kentucky |
| 68 | Cecil C Conner | 47 | Brother | Awning Hanger | Kentucky |
| 69 | — | None | — | — | — |
| 70 | Matthew O Mchenchey | 31 | Head | Welfare Director | Kentucky |
| 71 | Kathleen Mchenchey | 26 | Sister | Stenographer | Kentucky |
| 72 | Jennie Elliott | 70 | Servant | Servant | Kentucky |
| 73 | — | None | — | — | — |
| 74 | Walter J Legel | 38 | Head | Clerk | Kentucky |
| 75 | Elizabeth Ludi | 52 | Aunt | — | Kentucky |
| 76 | Jacob Ludi | 57 | Uncle | Painter | Switzerland |
| 77 | Julius Schmutz | 43 | Head | President | Kentucky |
| 78 | Florence Schmutz | 35 | Sister | — | Kentucky |
| 79 | Rollin B Patton | 42 | Head | Salesman | Kentucky |
| 80 | Laetitia Patton | 40 | Wife | — | 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)