JG
John Grady — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this John Grady across the 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 6-person household.
Age 15
b. ~1925
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Grady |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | S |
| Industry | 6 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | S |
| Township / Ward | Jersey 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Raymond Grady | Son | — | 20 | ~1920 |
| Anne Grady | Daughter | — | 27 | ~1913 |
| John Grady | Son | — | 15 | ~1925 |
| Theresa Grady | Daughter | — | 14 | ~1926 |
| John Grady | Head | — | 51 | ~1889 |
| Mary Grady | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Hudson, New …
Son, age 5
Hudson, New Jersey · implied b. ~1925 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | John R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 15
Hudson-County, New Jersey · implied b. ~1925 — 6 household members
| Surname | Grady |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | S |
| Industry | 6 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 · New Jersey
★ You are viewing this record
Sibling
Anne Grady
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Grady
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Grady
Sibling · 1940 · age 20
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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02404-00557)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Terressa James | 35 | Wife | No | New York |
| 2 | William James | 6 | Son | S | New Jersey |
| 3 | Maggie James | 3 | Daughter | S | New Jersey |
| 4 | William Morton | 59 | Head | Pullman Porter | Virginia |
| 5 | Maggie Morton | 55 | Wife | No | Virginia |
| 6 | Louis Dalberry | 36 | Head | Printer | New Jersey |
| 7 | Donna Dalberry | 30 | Wife | No | England |
| 8 | Louis Dalberry | 2 | Son | — | New Jersey |
| 9 | Harry Butterfield | 52 | Father-in-law | Standard Oil | England |
| 10 | Ethel Butterfield | 51 | Mother-in-law | No | England |
| 11 | John Blain | 48 | Head | Instrument Maker | New York |
| 12 | Gertrude Blain | 48 | Wife | No | New York |
| 13 | Raymond Heikly | 43 | Head | Federal Ship Yard | New Jersey |
| 14 | Helen Heikly | 42 | Wife | No | New York |
| 15 | Grace Heikly | 10 | Daughter | S | New Jersey |
| 16 | Theresa Heikly | 57 | Sister-in-law | Box Maker | New York |
| 17 | John Harber | 53 | Head | Chauffeur | Penn. |
| 18 | Catherine Harber | 47 | Wife | No | New Jersey |
| 19 | Wilson Harber | 22 | Son | Upholsterers Helper | New Jersey |
| 20 | Yvonne Rheis | 11 | Lodger | S | New York |
| 21 | Clara Rheis | 42 | Daughter | Polisher | New York |
| 22 | Carrie Johnson | 62 | Head | Home | New Jersey |
| 23 | Helen Johnson | 31 | Daughter | Stenographer | New Jersey |
| 24 | Joseph Harrison | 45 | Head | Pipe Fitter | New Jersey |
| 25 | Alice Harrison | 42 | Wife | No | New York |
| 26 | Muriel Harrison | 20 | Daughter | Public Service | New Jersey |
| 27 | Walter Harrison | 18 | Son | Ship F. & M. | New Jersey |
| 28 | Robert Trainor | 41 | Head | Fireman | Penn. |
| 29 | Annie Trainor | 33 | Wife | No | Penn. |
| 30 | Jacqueline Trainor | 13 | Daughter | S | Penn. |
| 31 | Seigrid Caltenbach | 54 | Head | Runner | Norway |
| 32 | Julia Caltenbach | 46 | Wife | No | New Jersey |
| 33 | Herbert Caltenbach | 24 | Son | Clerk | New York |
| 34 | John Grady | 51 | Head | Standard Oil | New Jersey |
| 35 | Mary Grady | 45 | Wife | No | New Jersey |
| 36 | Raymond Grady | 20 | Son | New Worker | New Jersey |
| 37 | Anne Grady | 27 | Daughter | New Worker | New Jersey |
| 38 | John Jr. Grady THIS PERSON | 15 | Son | S | New Jersey |
| 39 | Theresa Grady | 14 | Daughter | S | New Jersey |
| 40 | Francis Cowan | 42 | Head | Clerk | New Jersey |
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)