JG
John Grace — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Indiana-County, Pennsylvania
Our Model Tree links this John Grace across the 1930 and 1940 US Censuses in Indiana-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 6-person household.
Age 17
b. ~1923
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Indiana-County, Pennsylvania |
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Indiana |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Center Twp |
| Est. Birth Year | ~1923 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Vincent Grace | Son | — | 15 | ~1925 |
| Rose Grace | Spouse | — | 45 | ~1895 |
| John Grace | Head | — | 47 | ~1893 |
| John Grace | Son | — | 17 | ~1923 |
| Elizabeth Grace | Daughter | — | 20 | ~1920 |
| Robert Grace | Son | — | 23 | ~1917 |
Census Appearances
1930
Indiana, Pennsylvania
Son, age 7
Indiana, Pennsylvania · implied b. ~1923 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Indiana-County, Pennsylvania
Son, age 17
Indiana-County, Pennsylvania · implied b. ~1923 — 6 household members
| Surname | Grace |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Indiana |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| 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 Grace across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Grace
Son · 1940 · age 17 · b. ~1923 · Pennsylvania
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Sibling
Robert Grace
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Grace
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vincent Grace
Sibling · 1940 · age 15
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 — Indiana-County, Pennsylvania
Open full size
1940 US Federal Census — Indiana-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03516-00585)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William J. Bishop | 30 | Head | Farmer | Pennsylvania |
| 2 | Helen E. Bishop | 25 | Wife | — | Pennsylvania |
| 3 | William G. Bishop | 5 | Son | — | Pennsylvania |
| 4 | Isadora B. Bishop | 3 | Daughter | — | Pennsylvania |
| 5 | Knox S. Cover | 33 | Head | Laborer | Pennsylvania |
| 6 | Helen Cover | 27 | Wife | — | Pennsylvania |
| 7 | Margaret E. Cover | 11 | Daughter | — | Pennsylvania |
| 8 | Paully Cover | 10 | Son | — | Pennsylvania |
| 9 | Ellen J. Cover | 7 | Daughter | — | Pennsylvania |
| 10 | Helen G. Cover | 4 | Daughter | — | Pennsylvania |
| 11 | Cynthia Cover | 57 | Mother | — | Pennsylvania |
| 12 | Andrew B. Howard | 62 | Father-in-law | — | Pennsylvania |
| 13 | Anton Darkovich | 56 | Head | Farmer | Austria |
| 14 | Anna Darkovich | 51 | Wife | — | Austria |
| 15 | Mike Darkovich | 22 | Son | Miner | Pennsylvania |
| 16 | Steve Darkovich | 21 | Son | Farmer | Pennsylvania |
| 17 | Anna Darkovich | 18 | Daughter | — | Pennsylvania |
| 18 | Irene Darkovich | 15 | Daughter | — | Pennsylvania |
| 19 | Joseph Darkovich | 13 | Son | — | Pennsylvania |
| 20 | Helen Darkovich | 12 | Daughter | — | Pennsylvania |
| 21 | John Darkovich | 6 | Son | — | Pennsylvania |
| 22 | Catherine Darkovich | 25 | Daughter-in-law | — | Pennsylvania |
| 23 | J. Hilmer Kinter | 46 | Head | Assistant Mine Foreman | Pennsylvania |
| 24 | Anna Kinter | 44 | Wife | — | Pennsylvania |
| 25 | Alice Hirschman | 24 | Daughter | Beautician | Pennsylvania |
| 26 | Joyce Anne Hirschman | 3 | Daughter | — | Pennsylvania |
| 27 | John Grace | 47 | Head | Miner | Pennsylvania |
| 28 | Rose Grace | 45 | Wife | — | Pennsylvania |
| 29 | Robert Grace | 23 | Son | Miner | Pennsylvania |
| 30 | Elizabeth Grace | 20 | Daughter | — | Pennsylvania |
| 31 | John Grace THIS PERSON | 17 | Son | — | Pennsylvania |
| 32 | Vincent Grace | 15 | Son | — | Pennsylvania |
| 33 | Russell Loccard | 32 | Head | Carpenter | Pennsylvania |
| 34 | Nellie Loccard | 35 | Wife | — | Pennsylvania |
| 35 | Edith J. Loccard | 13 | Daughter | — | Pennsylvania |
| 36 | Frank A. Opdyke | 78 | Head | — | Pennsylvania |
| 37 | Emma Opdyke | 74 | Wife | — | Pennsylvania |
| 38 | Robert Opdyke | 21 | Son | Attendant Gas Station | Pennsylvania |
| 39 | William E. Mcnutt | 68 | Head | Farmer | Pennsylvania |
| 40 | Tillie Mcnutt | 61 | Wife | — | Pennsylvania |
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)