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Margaret Mahoney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Margaret Mahoney across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents Dave & David — first a daughter (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Mahoney |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville city |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Assembler |
| Industry | Vanity manufacturing |
| Class of Worker | PW |
| Hours Worked | 17 |
| Income (1939) | 496 |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Assembler |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1915 |
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 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| James Mahoney | Son | — | 10 | ~1930 |
| Margaret Mahoney | Spouse | — | 46 | ~1894 |
| J Mahoney | Head | — | 53 | ~1887 |
| Margaret Mahoney | Daughter | — | 25 | ~1915 |
Census Appearances
1920
Jefferson, Kentucky
Daughter, age 2
Jefferson, Kentucky · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Margerite |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| 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
Daughter, age 14
Jefferson, Kentucky · implied b. ~1916 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Marguerite |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Daughter, age 25
Jefferson-County, Kentucky · implied b. ~1915 — 4 household members
| Surname | Mahoney |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville city |
| 1935 Residence (County) | Jefferson |
| Occupation | Assembler |
| Industry | Vanity manufacturing |
| Class of Worker | PW |
| Hours Worked | 17 |
| Income (1939) | 496 |
| Highest Grade | H-1 |
| 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 Margaret Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Dave Mahoney (~0.92 confidence) and father David Mahoney (~0.92 confidence) and father J Mahoney (~0.92 confidence) and mother Aggie Mahoney (~0.92 confidence) and mother Margaret Mahoney (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Dave Mahoney
b. ~1900
Source father
● Household
· direct · ~0.92
Father
David Mahoney
b. ~1888
Source father
● Household
· direct · ~0.92
Father
J Mahoney
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Aggie Mahoney
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Margaret Mahoney
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mahoney
Daughter · 1940 · age 25 · b. ~1915 · Kentucky
★ You are viewing this record
Sibling
James Mahoney
Sibling · 1940 · age 10
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-t0627-01374-00596)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eula Milby | 25 | Sister | — | Kentucky |
| 2 | James Milliner | 40 | Head | Heater | Kentucky |
| 3 | Bridget Milliner | 35 | Wife | — | Kentucky |
| 4 | Dorothy Milliner | 12 | Daughter | — | Kentucky |
| 5 | Mildred Milliner | 15 | Daughter | Carpenter Helper | Kentucky |
| 6 | Edward Reel | 65 | Head | Manager | Virginia |
| 7 | Mary Reel | 50 | Wife | — | Kentucky |
| 8 | Clarence E. Rath | 48 | Head | Car Operator | Indiana |
| 9 | Cosby Rath | 48 | Wife | — | Virginia |
| 10 | Gale Rath | 18 | Daughter | Beauty Operator | Kentucky |
| 11 | Wanda Rath | 15 | Daughter | — | Kentucky |
| 12 | Extra Line Extra Line | None | — | — | — |
| 13 | J. L. Blair | 49 | Head | — | Kentucky |
| 14 | Betty Blair | 54 | Wife | — | Kentucky |
| 15 | J. Y. Mahoney | 53 | Head | Laborer | Kentucky |
| 16 | Margaret Mahoney | 46 | Wife | — | Kentucky |
| 17 | Margaret Mahoney THIS PERSON | 25 | Daughter | Assembler | Kentucky |
| 18 | James Mahoney | 10 | Son | — | Kentucky |
| 19 | Pearl Hunceman | 47 | Head | Cook And Waitress | Kentucky |
| 20 | Gladys Hunceman | 16 | Daughter | — | Kentucky |
| 21 | John D. Shay | 50 | Head | Machinist | Kentucky |
| 22 | Pat Shay | 53 | Brother | Cashier At Mutuels | Kentucky |
| 23 | Wilmae Hazelrigg | 31 | Head | Laborer | Kentucky |
| 24 | Shirley Hazelrigg | 11 | Daughter | — | Kentucky |
| 25 | Phyllis Hazelrigg | 9 | Daughter | — | Kentucky |
| 26 | Lorena Kritzkie | 42 | Head | Laundress | Kentucky |
| 27 | Carl Louis Kritzkie | 9 | Son | — | Kentucky |
| 28 | Elizabeth O'Mara | 42 | Head | — | Kentucky |
| 29 | Louise Bickett | 23 | Daughter | Laundress | Kentucky |
| 30 | Doris Jean Bickett | 2 | Granddaughter | — | Kentucky |
| 31 | Jessie Butler | 42 | Head | — | Kentucky |
| 32 | Bobbie Butler | 12 | Son | — | Kentucky |
| 33 | Raymond Lucey | 22 | Son | Laborer | Kentucky |
| 34 | Pattie Lucey | 21 | Daughter-in-law | Manicurist | Kentucky |
| 35 | Tommie Lucey | 2 | Grandson | — | Kentucky |
| 36 | W. B. Blankenbaker | 67 | Head | Order Checker | Kentucky |
| 37 | Mary Beatrice King | 25 | Girl | Laborer | Kentucky |
| 38 | Charles Swann | 38 | Lodger | Interior Decorator | Georgia |
| 39 | Charles L. Coomes | 53 | Head | Painter Task Office | Kentucky |
| 40 | Margaret Coomes | 49 | Wife | — | Oklahoma |
Pedigree Summary
Margaret + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)