JH
John Hays — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this John Hays across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Hays |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1926 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Charles Davis | Son | — | 55 | ~1885 |
| Jerome Hays | Spouse | — | 40 | ~1900 |
| Matilda Hays | Spouse | — | 33 | ~1907 |
| Anna Davis | Daughter | — | 47 | ~1893 |
| Matilda Davis | Spouse | — | 68 | ~1872 |
| John Hays | Son | — | 14 | ~1926 |
| Lehrist Davis | Head | — | 71 | ~1869 |
Census Appearances
1930
Allegheny, Pennsylvania
Other, age 4
Allegheny, Pennsylvania · implied b. ~1926 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hays |
| Given Name | John |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 14
Allegheny-County, Pennsylvania · implied b. ~1926 — 7 household members
| Surname | Hays |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Income (1939) | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 John Hays across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Hays
Son · 1940 · age 14 · b. ~1926 · Pennsylvania
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Sibling
Charles Davis
Sibling · 1940 · age 55
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Davis
Sibling · 1940 · age 47
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03671-00016)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Julia Eisler | 67 | Head | — | Germany |
| 2 | William Eisler | 63 | Husband | — | Germany |
| 3 | Neil Daugherty | 45 | Head | Manager | Ireland |
| 4 | Mary Daugherty | 41 | Wife | — | Scotland |
| 5 | May May | 19 | Daughter | Waitress | Ireland |
| 6 | James May | 16 | Son | — | Pennsylvania |
| 7 | Neil Jr. May | 10 | Son | — | Pennsylvania |
| 8 | John May | 7 | Son | — | Pennsylvania |
| 9 | Warren May | 6 | Son | — | Pennsylvania |
| 10 | Mary Harmon | 68 | Head | — | Pennsylvania |
| 11 | Alice Beamer | 28 | Head | — | Pennsylvania |
| 12 | Lehrist Davis | 71 | Head | — | Pennsylvania |
| 13 | Matilda Davis | 68 | Wife | — | Germany |
| 14 | Charles Davis | 55 | Son | Lineman | Pennsylvania |
| 15 | Anna Davis | 47 | Daughter | Machine Oper | Pennsylvania |
| 16 | Jerome Hays | 40 | Husband | Salesman | Pennsylvania |
| 17 | Matilda Hays | 33 | Wife | Seamstress | Pennsylvania |
| 18 | John Hays THIS PERSON | 14 | Son | — | Pennsylvania |
| 19 | William Sweeny | 56 | Head | Boiler Maker | Pennsylvania |
| 20 | Cora Sweeny | 55 | Wife | — | Pennsylvania |
| 21 | Francis A. Mcdermott | 50 | Head | Dispatcher | Pennsylvania |
| 22 | Delia Mcdermott | 57 | Wife | — | Pennsylvania |
| 23 | William Hanrahan | 63 | Head | — | Pennsylvania |
| 24 | Katherine Hanrahan | 61 | Wife | — | Pennsylvania |
| 25 | Gilbert J. Hanrahan | 37 | Son | Pharmacist | Pennsylvania |
| 26 | Anna Bleininger | 59 | Head | — | Germany |
| 27 | Stella Bleininger | 28 | Daughter | Stenographer | Pennsylvania |
| 28 | Rose W. Learner | 38 | Head | Laborer | Pennsylvania |
| 29 | Stella Learner | 28 | Wife | — | Pennsylvania |
| 30 | Anna Bobb | 40 | Head | Operator | Pennsylvania |
| 31 | Julie Hathazy | 67 | Head | — | Hungary |
| 32 | Hathazy Paul Hathazy | 36 | Son | Glass Blower | Hungary |
| 33 | James Hathazy | 28 | Son | — | West Virginia |
| 34 | Helen Hathazy | 26 | Daughter | — | West Virginia |
| 35 | Joseph Hathazy | 24 | Son | Shipper | West Virginia |
| 36 | Emil Mendza | 72 | Head | Watchman | Germany |
| 37 | Minnie Mendza | 67 | Wife | — | Germany |
| 38 | Robert Mendza | 26 | Son | Apprentice | Pennsylvania |
| 39 | Evelyn Mendza | 16 | Daughter | — | Pennsylvania |
| 40 | Charles Mendza | 31 | Nephew | Helper | Canada |
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)