MH
Mary Hays — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this Mary Hays across the 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Female
Daughter
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Hays |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | ST. MATTHEWS CITY |
| 1935 Residence (County) | JEFFERSON |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Township / Ward | St Matthews City |
| Est. Birth Year | ~1925 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Hays | Daughter | — | 15 | ~1925 |
| Leonard Hays | Son | — | 11 | ~1929 |
| Dorothy Hays | Daughter | — | 13 | ~1927 |
| Helen Hays | Daughter | — | 7 | ~1933 |
| Mary Hays | Spouse | — | 39 | ~1901 |
| Timothy Hays | Son | — | 2 | ~1938 |
| Leonard Hays | Head | — | 42 | ~1898 |
Census Appearances
1930
Jefferson, Kentucky
Daughter, age 4
Jefferson, Kentucky · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hays |
| Given Name | Mary M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| 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 15
Jefferson-County, Kentucky · implied b. ~1925 — 7 household members
| Surname | Hays |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | ST. MATTHEWS CITY |
| 1935 Residence (County) | JEFFERSON |
| Income (1939) | 0 |
| 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 Mary Hays across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hays
Daughter · 1940 · age 15 · b. ~1925 · Kentucky
★ You are viewing this record
Sibling
Timothy Hays
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Hays
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Hays
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Hays
Sibling · 1940 · age 11
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-t0627-01320-00162)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lillie Feige | 59 | Wife | — | Kentucky |
| 42 | Phillip R. Jr. Feige | 19 | Son | — | Kentucky |
| 43 | Carolyn Moore | 25 | Daughter | Manager | Kentucky |
| 44 | Carrie Wachendorf | 62 | Sister-in-law | — | Kentucky |
| 45 | Lucille Aynes | 29 | Niece | Presser | Kentucky |
| 46 | Edward C. Martin | 66 | Head | Photographer | Kentucky |
| 47 | Louise Martin | 63 | Wife | — | Kentucky |
| 48 | Josephine Schornberg | 65 | Sister-in-law | — | Kentucky |
| 49 | Leonard J. Hays | 42 | Head | Contractor | Kentucky |
| 50 | Mary C. Hays | 39 | Wife | — | Kentucky |
| 51 | Mary M. Hays THIS PERSON | 15 | Daughter | — | Kentucky |
| 52 | Dorothy A. Hays | 13 | Daughter | — | Kentucky |
| 53 | Leonard J. Jr. Hays | 11 | Son | — | Kentucky |
| 54 | Helen L. Hays | 7 | Daughter | — | Kentucky |
| 55 | Timothy M. Hays | 2 | Son | — | Kentucky |
| 56 | Harold H. Thompson | 48 | Head | Foreman | Illinois |
| 57 | Mildred Thompson | 41 | Wife | — | Ohio |
| 58 | Roger D. Thompson | 15 | Son | — | Ohio |
| 59 | Laura J. Thompson | 9 | Daughter | — | Ohio |
| 60 | James L. Whitney | 34 | Head | Railway Mail Clerk | Kentucky |
| 61 | Della Whitney | 35 | Wife | — | Kentucky |
| 62 | Millie L. Whitney | 6 | Daughter | — | Ohio |
| 63 | Carl A. Sandman | 37 | Head | Auditor | Kentucky |
| 64 | Blanche Sandman | 33 | Wife | — | Kentucky |
| 65 | William A. Whitson | 48 | Head | Salesman | Indiana |
| 66 | Dorothy Whitson | 42 | Wife | — | Illinois |
| 67 | George G. Shackelford | 49 | Head | Chauffeur | Kentucky |
| 68 | Anna K. Shackelford | 52 | Wife | — | Kentucky |
| 69 | Alice E. Potts | 27 | Head | Secretary | Kentucky |
| 70 | William E. Weems | 37 | Head | Superintendent | Tennessee |
| 71 | Mary E. Weems | 30 | Wife | — | Louisiana |
| 72 | Mary B. Weems | 10 | Daughter | — | Kentucky |
| 73 | William H. Kuhl | 50 | Head | Collector | Kentucky |
| 74 | Johanna Kuhl | 50 | Wife | — | Kentucky |
| 75 | Lynelda Kuhl | 22 | Daughter | Bookkeeper | Kentucky |
| 76 | Martha Kuhl | 20 | Daughter | File Clerk | Kentucky |
| 77 | William H. Jr. Kuhl | 18 | Son | — | Kentucky |
| 78 | Mary Kuhl | 17 | Daughter | — | Kentucky |
| 79 | Frances Kuhl | 15 | Daughter | — | Kentucky |
| 80 | Johanna Kuhl | 13 | Daughter | — | Kentucky |
Related Census Records
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)