JG
John Grady — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Grady across the 1910, 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Pannie & Isaac — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Grady |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Porter |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 750 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Porter |
| Township / Ward | Malden City |
| Est. Birth Year | ~1909 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Caroline Grady | Spouse | — | 31 | ~1909 |
| John Grady | Son | — | 10 | ~1930 |
| John Grady | Head | — | 31 | ~1909 |
Census Appearances
1910
Middlesex, Massachusetts
Son, age 1
Middlesex, Massachusetts · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | John S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Virginia |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Other, age 11
Middlesex, Massachusetts · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | John S. |
| Relationship to Head | Step Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Virginia |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Head, age 21
Middlesex, Massachusetts · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | John C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 20 |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Virginia |
| Occupation | Gardener |
| Industry | Private Estate |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 31
Middlesex-County, Massachusetts · implied b. ~1909 — 3 household members
| Surname | Grady |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Occupation | Porter |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 750 |
| Highest Grade | H-3 |
| 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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Pannie Grady (~0.92 confidence) and father Isaac Grady (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Pannie Grady
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
Isaac Grady
b. ~1886
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Grady
Head · 1940 · age 31 · b. ~1909 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01609-00583)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred White | 6 | daughter | — | Massachusetts |
| 2 | Andrew Farmer | 62 | Head | — | Virginia |
| 3 | Hannah Farmer | 68 | wife | — | North Carolina |
| 4 | Claire Farmer | 5 | grand-daughter | — | Massachusetts |
| 5 | Emma L. Gibson | 54 | Head | — | Virginia |
| 6 | Ernest Gibson | 35 | son | Laborer | Massachusetts |
| 7 | John Gibson | 25 | son | Cook | Massachusetts |
| 8 | Harold Gibson | 22 | son | Spring Worker | Massachusetts |
| 9 | Paul Gibson | 21 | son | Bus Boy | Massachusetts |
| 10 | Emma Gibson | 18 | daughter | House Keeper | Massachusetts |
| 11 | Philip Gibson | 16 | son | — | Massachusetts |
| 12 | Marie Gibson | 9 | son | — | Massachusetts |
| 13 | Alice Vaughn | 23 | daughter | Elevator Girl | Massachusetts |
| 14 | John Vaughn | 2 | grand-son | — | Massachusetts |
| 15 | Frank Davis | 25 | Head | Punch Press Operator | Massachusetts |
| 16 | Francis Davis | 25 | wife | — | Massachusetts |
| 17 | Sandra Davis | 2 | daughter | — | Massachusetts |
| 18 | John J. Sullivan | 43 | Head | Laborer | Massachusetts |
| 19 | Etta M. Sullivan | 42 | wife | — | Massachusetts |
| 20 | Arthur G. Streck | 20 | step-son | Truck Driver | Massachusetts |
| 21 | Ernest R. Hamilton | 40 | boarder | Truck Driver | Massachusetts |
| 22 | Angelo Iannello | 46 | Head | Barber | Italy |
| 23 | Blanche Iannello | 42 | wife | Mender | Nova Scotia |
| 24 | Nina Iannello | 21 | daughter | Looper | Massachusetts |
| 25 | Gloria Iannello | 13 | daughter | — | Massachusetts |
| 26 | Eleanor Iannello | 8 | daughter | — | Massachusetts |
| 27 | Annie Pockris | 61 | Head | — | Russia |
| 28 | Samuel Miller | 39 | Head | Pharmacist | Lithuania |
| 29 | Gertrude Miller | 34 | wife | — | Russia |
| 30 | Doreen Miller | 7 | daughter | — | Massachusetts |
| 31 | William Reed | 71 | Head | — | Alabama |
| 32 | Mary A. Reed | 68 | wife | — | Georgia |
| 33 | Bernard Ricciardone | 24 | Head | Laborer | Massachusetts |
| 34 | Angeles Ricciardone | 20 | wife | Candy Worker | Massachusetts |
| 35 | Pasquale Ricciardone | 26 | Head | Chauffer | Massachusetts |
| 36 | Angelina Ricciardone | 23 | wife | — | Massachusetts |
| 37 | Anthony Ricciardone | 1 | son | — | Massachusetts |
| 38 | John Grady THIS PERSON | 31 | Head | Porter | Massachusetts |
| 39 | Caroline Grady | 31 | wife | — | Massachusetts |
| 40 | John Grady | 10 | son | — | Massachusetts |
Pedigree Summary
John
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)