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John Grady — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Ohio
Our Model Tree links this John Grady across the 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 8-person household.
Age 15
b. ~1925
Male
Son
Born: Georgia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Ohio |
| Surname | Grady |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Georgia |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
| Township / Ward | Dayton 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Frank Grady | Son | — | 12 | ~1928 |
| Louise Grady | Daughter | — | 22 | ~1918 |
| Abraham Grady | Son | — | 14 | ~1926 |
| John Grady | Son | — | 15 | ~1925 |
| Bessie Grady | Daughter | — | 19 | ~1921 |
| Pearl Grady | Spouse | — | 47 | ~1893 |
| Leon Grady | Son | — | 9 | ~1931 |
| Benjamin Grady | Son | — | 27 | ~1913 |
Census Appearances
1930
Montgomery, Ohio
Son, age 8
Montgomery, Ohio · implied b. ~1922 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | John Henry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Georgia |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Alabama |
| Can Read/Write | Yes |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
1940
Montgomery-County, Ohio
Son, age 15
Montgomery-County, Ohio · implied b. ~1925 — 8 household members
| Surname | Grady |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Georgia |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Industry | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
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 Grady across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Grady
Son · 1940 · age 15 · b. ~1925 · Ohio
★ You are viewing this record
Sibling
Leon Grady
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bessie Grady
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Benjamin Grady
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Abraham Grady
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Grady
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Grady
Sibling · 1940 · age 22
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 — Montgomery-County, Ohio
Open full size
1940 US Federal Census — Montgomery-County, Ohio
Page Contents
14 people indexed on this census page (nara:1940:m-t0627-03251-00416)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Pearl Grady | 47 | Wife | — | Alabama |
| 42 | Benjamin Grady | 27 | Son | Truck Driver | Georgia |
| 43 | Louise Grady | 22 | Daughter | Housework | Georgia |
| 44 | Bessie Grady | 19 | Daughter | Waitress | Georgia |
| 45 | John Jr. Grady THIS PERSON | 15 | Son | — | Georgia |
| 46 | Abraham Grady | 14 | Son | — | Ohio |
| 47 | Frank Grady | 12 | Son | — | Ohio |
| 48 | Leon Grady | 9 | Son | — | Ohio |
| 52 | George Lupasky | 66 | Head | Proprietor | Hungary |
| 53 | Elizabeth Lupasky | 57 | Wife | Waitress | Hungary |
| 54 | Elizabeth Lupasky | 25 | Daughter | Switchboard Op. | Ohio |
| 55 | Michael Lupasky | 26 | Son | Waiter | Ohio |
| 56 | Helen Lupasky | 24 | Daughter | Waitress | Ohio |
| 57 | Lewis Lupasky | 21 | Son | Waiter | West Virginia |
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)