MM
Mary Mahoney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jackson-County, Missouri
Our Model Tree links this Mary Mahoney across the 1920, 1930 and 1940 US Censuses in Jackson-County, Missouri (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jackson-County, Missouri |
| Surname | Mahoney |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Kansas City |
| 1935 Residence (County) | Jackson |
| Additional Details | |
| Occupation | Machine operator |
| Industry | Kansas City Power and Light |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1020 |
| Highest Grade | H-4 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Machine Operator |
| Township / Ward | Kansas City |
| Est. Birth Year | ~1916 |
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 |
|---|---|---|---|---|
| Teresa Mahoney | Daughter | — | 34 | ~1906 |
| Mary Mahoney | Daughter | — | 24 | ~1916 |
| John Mahoney | Head | — | 63 | ~1877 |
| James Mahoney | Son | — | 29 | ~1911 |
| Mary Mahoney | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Jackson, Missouri
Daughter, age 3
Jackson, Missouri · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Mary V. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Jackson, Missouri
Daughter, age 14
Jackson, Missouri · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Jackson-County, Missouri
Daughter, age 24
Jackson-County, Missouri · implied b. ~1916 — 5 household members
| Surname | Mahoney |
| Given Name | Mary L. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Kansas City |
| 1935 Residence (County) | Jackson |
| Occupation | Machine operator |
| Industry | Kansas City Power and Light |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1020 |
| Highest Grade | H-4 |
| 1935 Residence | Missouri |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mahoney (~0.92 confidence) and father John Mahoney (~0.92 confidence) and mother Mary Mahoney (~0.92 confidence) and mother Margaret Mahoney (~0.92 confidence) and father Mike Mahoney (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mahoney
b. ~1877
Source father
● Household
· direct · ~0.92
Father
John Mahoney
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Mary Mahoney
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Margaret Mahoney
b. ~1889
Source mother
● Household
· direct · ~0.92
Father
Mike Mahoney
b. ~1890
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Mahoney
Daughter · 1940 · age 24 · b. ~1916 · Missouri
★ You are viewing this record
Sibling
Teresa Mahoney
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mahoney
Sibling · 1940 · age 29
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 — Jackson-County, Missouri
Open full size
1940 US Federal Census — Jackson-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02170-00344)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Thomas | 21 | lodger | Stenographer | Missouri |
| 42 | Lucille Sturtz | 23 | lodger | Stenographer | Iowa |
| 43 | Everett Whitesides | 25 | lodger | Salesclerk | Oklahoma |
| 44 | Albert Gesson | 21 | lodger | Engraver | Missouri |
| 45 | Ollie C. Norwood | 38 | lodger | Comptometer Operator | Minnesota |
| 46 | Patricia Norwood | 14 | lodger | — | Minnesota |
| 47 | Billy Norwood | 11 | son | — | Minnesota |
| 48 | Minnie Clarke | 47 | maid | Maid | Arkansas |
| 49 | Harry M. Wright | 52 | lodger | Car Washer | Missouri |
| 50 | John J. C. Mahoney | 63 | head | Motor Driver | Missouri |
| 51 | Mary E. Mahoney | 57 | wife | — | Missouri |
| 52 | Teresa M. Mahoney | 34 | daughter | Comptometer Operator | Missouri |
| 53 | James J. Mahoney | 29 | son | Car Placer Machine | Missouri |
| 54 | Mary L. Mahoney THIS PERSON | 24 | daughter | Machine Operator | Missouri |
| 55 | Mary A. Trautman | 64 | head | Inspector | Kentucky |
| 56 | Lauretta Trautman | 38 | daughter | Stenographer | Missouri |
| 57 | Margaret Sumervell | 69 | sister | — | Kentucky |
| 58 | Frank Mcevoy | 52 | brother | Assistant Plumber | Missouri |
| 59 | Blanche Arnold | 34 | head | Typist | Kansas |
| 60 | Cecilia Arnold | 9 | daughter | — | Missouri |
| 61 | Jan Arnold | 4 | daughter | — | Missouri |
| 62 | Anne Snellings | 87 | head | — | Missouri |
| 63 | Reesa Snellings | 55 | daughter | Telephone Operator | Missouri |
| 64 | Josephine De Shazer | 61 | housekeeper | Housekeeper | Missouri |
| 65 | Grant Powers | 29 | head | Traveling Salesman | Missouri |
| 66 | Doris Powers | 25 | wife | Designer | Missouri |
| 67 | Patty Powers | 3 | daughter | — | Missouri |
| 68 | Harold Chenhall | 30 | head | Paymaster | Oregon |
| 69 | Doris A. Chenhall | 26 | wife | — | Kansas |
| 70 | Romayne R. Day | 58 | head | Bookkeeper | Virginia |
| 71 | Hester Day | 37 | daughter | Magistrate | Missouri |
| 72 | Gabe Moss | 62 | brother | Nightwatchman | Virginia |
| 73 | Merril G. Lanning | 29 | head | Manager | Ohio |
| 74 | Irene Lanning | 26 | wife | — | Missouri |
| 75 | Richard Lanning | 6 | son | — | Kansas |
| 76 | Faye Heimseth | 20 | lodger | Waitress | Missouri |
| 77 | Howard Currin | 40 | head | Owner | Missouri |
| 78 | Betty Currin | 39 | wife | Senior Service Order Clerk | Missouri |
| 79 | Warren Butler | 62 | head | Salesman | New York |
| 80 | Minnie M. Butler | 54 | wife | — | Nebraska |
Pedigree Summary
Mary + 2 siblings
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)