JG
John Grady — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Grady across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 8-person household.
Age 17
b. ~1923
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Grady |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Errand boy |
| Industry | Wholesale Bev. |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 242 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Errand Boy |
| Township / Ward | Boston City |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Katherine Grady | Spouse | — | 50 | ~1890 |
| Peter Grady | Son | — | 14 | ~1926 |
| Anna Grady | Daughter | — | 19 | ~1921 |
| Thomas Grady | Son | — | 7 | ~1933 |
| Thomas Grady | Head | — | 45 | ~1895 |
| Sarah Grady | Daughter | — | 16 | ~1924 |
| Eileen Grady | Daughter | — | 10 | ~1930 |
| John Grady | Son | — | 17 | ~1923 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 6
Suffolk, Massachusetts · implied b. ~1924 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | John F |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 17
Suffolk-County, Massachusetts · implied b. ~1923 — 8 household members
| Surname | Grady |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Errand boy |
| Industry | Wholesale Bev. |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 242 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 17 · b. ~1923 · Massachusetts
★ You are viewing this record
Sibling
Eileen Grady
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Grady
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Grady
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Grady
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Grady
Sibling · 1940 · age 19
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01669-00208)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Berman Rose Clark | 33 | Wife | — | Massachusetts |
| 42 | Myron Clark | 11 | Son | — | Massachusetts |
| 43 | Judith Clark | 3 | Daughter | — | Massachusetts |
| 44 | Rebecca Rosenberg | 57 | Wife | — | Russia |
| 45 | Morris Rosenberg | 63 | Head | Peddler | Russia |
| 46 | Edward Levine | 67 | Head | Elevator | Massachusetts |
| 47 | Maude Levine | 60 | Wife | — | Canada |
| 48 | James Mckenna | 50 | Head | Sitter Maker | Massachusetts |
| 49 | Margaret Mckenna | 24 | Daughter | — | Massachusetts |
| 50 | James Jr. Mckenna | 21 | Son | New Worker | Massachusetts |
| 51 | William Mckenna | 17 | Son | New Worker | Massachusetts |
| 52 | William Harris | 51 | Head | Clerk | Massachusetts |
| 53 | Mabel Harris | 51 | Wife | — | Massachusetts |
| 54 | Ruth Mchugh | 27 | Daughter | — | Massachusetts |
| 55 | Sarah Harris | 23 | Daughter | Clerk | Massachusetts |
| 56 | Geraldine Mchugh | 2 | Granddaughter | — | Massachusetts |
| 57 | Fergus Riley | 47 | Head | Operator | Massachusetts |
| 58 | Mary Riley | 49 | Wife | — | Massachusetts |
| 59 | John Riley | 25 | Son | Packer | Massachusetts |
| 60 | Mildred Riley | 22 | Daughter | Saleslady | Massachusetts |
| 61 | Mary Riley | 20 | Daughter | Waitress | Massachusetts |
| 62 | End Of Block 18 - Start Of Block 19 | None | — | — | — |
| 63 | John Young | 68 | Head | — | Massachusetts |
| 64 | Thomas Grady | 45 | Head | Machine Operator | Eire |
| 65 | Katherine Grady | 50 | Wife | — | Eire |
| 66 | Anna Grady | 19 | Daughter | Clerk | Massachusetts |
| 67 | John Grady THIS PERSON | 17 | Son | Errand Boy | Massachusetts |
| 68 | Sarah Grady | 16 | Daughter | — | Massachusetts |
| 69 | Peter Grady | 14 | Son | — | Massachusetts |
| 70 | Eileen Grady | 10 | Daughter | — | Massachusetts |
| 71 | Thomas Grady | 7 | Son | — | Massachusetts |
| 72 | Erling Frankussen | 37 | Head | Meat Cutter | Norway |
| 73 | Gudrun Frankussen | 37 | Wife | — | Norway |
| 74 | Robert Frankussen | 10 | Son | — | Boston |
| 75 | Patrick Rossmagney | 46 | Lodger | Meat Cutter | Germany |
| 76 | George Dahlgren | 54 | Head | Electrician | Austria |
| 77 | Isabell Dahlgren | 49 | Wife | — | Massachusetts |
| 78 | Marion Dahlgren | 12 | Daughter | — | Massachusetts |
| 79 | Felix Bauer | 51 | Head | Machinist | Massachusetts |
| 80 | Mary Bauer | 44 | Wife | — | Massachusetts |
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)