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 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Frank & Frank — first a son (b.~1914), then head of a 7-person household.
Age 26
b. ~1914
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Grady |
| Given Name | John Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Salesman |
| Industry | Wholesale Textiles |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | C 4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Salesman |
| Township / Ward | Medford City |
| Est. Birth Year | ~1914 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Grady | Daughter | — | 22 | ~1918 |
| Ella Grady | Spouse | — | 65 | ~1875 |
| Catherine Grady | Daughter | — | 20 | ~1920 |
| Francis Grady | Son | — | 24 | ~1916 |
| Frank Grady | Head | — | 75 | ~1865 |
| John Grady | Son | — | 26 | ~1914 |
| Eleanor Grady | Daughter | — | 28 | ~1912 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 6
Middlesex, Massachusetts · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | John D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 16
Middlesex, Massachusetts · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 26
Middlesex-County, Massachusetts · implied b. ~1914 — 7 household members
| Surname | Grady |
| Given Name | John Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford city |
| 1935 Residence (County) | Middlesex |
| Occupation | Salesman |
| Industry | Wholesale Textiles |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 1200 |
| Highest Grade | C 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Grady (~0.92 confidence) and father Frank Grady (~0.92 confidence) and mother Ella Grady (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Grady
b. ~1867
Source father
● Household
· direct · ~0.92
Father
Frank Grady
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Ella Grady
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Grady
Son · 1940 · age 26 · b. ~1914 · Massachusetts
★ You are viewing this record
Sibling
Eleanor Grady
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Grady
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Grady
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine 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 — 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-t0627-01611-00666)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Virginia M Borden | 11 | Daughter | — | Massachusetts |
| 2 | Edward A Gorman | 42 | Head | Inspector | Massachusetts |
| 3 | Mary E Gorman | 39 | Wife | — | Massachusetts |
| 4 | Mary Gorman | 9 | Daughter | — | New York |
| 5 | Ellen Gorman | 6 | Daughter | — | New York |
| 6 | Cedric Janjanian | 25 | Head | Locksmith | Armenia |
| 7 | Kaspar Janjanian | 57 | Father | Locksmith | Armenia |
| 8 | Isabelle Janjanian | 43 | Mother | — | Armenia |
| 9 | Henry Janjanian | 14 | Brother | — | Massachusetts |
| 10 | John Janjanian | 12 | Brother | — | Massachusetts |
| 11 | George R Harris | 66 | Head | — | Maine |
| 12 | Phoebe M Harris | 66 | Wife | — | Maine |
| 13 | Elsie M Harris | 43 | Daughter | Secretary | Maine |
| 14 | Henry Risman | 58 | Head | Real Estate Sales | Russia |
| 15 | Jennie Risman | 60 | Wife | — | Russia |
| 16 | Sidney Crowson | 33 | Son-in-law | Manager | Massachusetts |
| 17 | Dora Crowson | 31 | Daughter | — | Massachusetts |
| 18 | Richard Crowson | 4 | Grandson | — | Massachusetts |
| 19 | Mabel Aroudis | 73 | Head | — | Massachusetts |
| 20 | Charles Currier | 24 | Head | Reporter | Massachusetts |
| 21 | Wesley Currier | 48 | Father | Mech. Engineer | Massachusetts |
| 22 | Helen Currier | 49 | Mother | — | Minnesota |
| 23 | Daniel Currier | 22 | Brother | Clerk | Massachusetts |
| 24 | Helen Currier | 19 | Sister | Clerk | Massachusetts |
| 25 | Frank G Grady | 75 | Head | — | Massachusetts |
| 26 | Ella V Grady | 65 | Wife | — | New York |
| 27 | Francis Grady | 24 | Son | Manager | Massachusetts |
| 28 | Mary Grady | 22 | Daughter | Teacher | Massachusetts |
| 29 | Catherine A Grady | 20 | Daughter | Artist | Massachusetts |
| 30 | Eleanor Grady | 28 | Daughter | Teacher | Massachusetts |
| 31 | John Joseph Grady THIS PERSON | 26 | Son | Salesman | Massachusetts |
| 32 | Mary R Curtin | 34 | Head | Teacher | Massachusetts |
| 33 | Andrew F Curtin | 46 | Head | Proprietor | Massachusetts |
| 34 | Julia Curtin | 37 | Wife | — | Massachusetts |
| 35 | Andrew F Jr Curtin | 1 | Son | — | Massachusetts |
| 36 | Allan P Chase | 57 | Head | Owner | Massachusetts |
| 37 | Mary D Chase | 53 | Wife | — | Massachusetts |
| 38 | Rhoda Mcleod | 53 | Maid | Maid | Canada (Eng) |
| 39 | Dwight W Willis | 44 | Head | Pressman | Massachusetts |
| 40 | Lydia O Willis | 46 | Wife | — | Massachusetts |
Related Census Records
Pedigree Summary
John + 4 siblings
Gen 1 · 3 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)