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John Brady — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Brady across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Delia & Thomas — first a son (b.~1910), then head of a 2-person household.
Age 30
b. ~1910
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Brady |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Letter Carrier |
| Industry | U.S. Mail |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 222 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Letter Carrier |
| Township / Ward | Boston City |
| Est. Birth Year | ~1910 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Delia Gavin | Head | — | 75 | ~1865 |
| John Brady | Son | — | 30 | ~1910 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 9
Suffolk, Massachusetts · implied b. ~1911 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brady |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 20
Suffolk, Massachusetts · implied b. ~1910 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brady |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | clerk |
| Industry | office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 30
Suffolk-County, Massachusetts · implied b. ~1910 — 2 household members
| Surname | Brady |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Letter Carrier |
| Industry | U.S. Mail |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 222 |
| 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 Brady across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Delia Gavin (~0.92 confidence) and father Thomas Brady (~0.92 confidence) and father Daniel Brady (~0.92 confidence) and mother Mary Brady (~0.92 confidence) and mother Mary Brady (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Delia Gavin
b. ~1865
Source mother
● Household
· direct · ~0.92
Father
Thomas Brady
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Daniel Brady
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Mary Brady
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Mary Brady
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Brady
Son · 1940 · age 30 · b. ~1910 · 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 — 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-t0627-01672-00063)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Esther Perier | 42 | Wife | Cook Waitress | Russia |
| 2 | Sam Perier | 49 | Head | Bartender | Russia |
| 3 | Sidney Perier | 16 | Son | — | Massachusetts |
| 4 | Barnett Perier | 9 | Son | — | Massachusetts |
| 5 | Becky Kaplan | 73 | Mother | — | Russia |
| 6 | William J. Madigan | 59 | Head | — | Massachusetts |
| 7 | Mary E. Madigan | 61 | Sister | Labor Clerk | Massachusetts |
| 8 | Annie Madigan | 54 | Sister | — | Massachusetts |
| 9 | Gertrude Madigan | 40 | Sister | — | Massachusetts |
| 10 | James W. Callaghan | 43 | Head | Examiner | Massachusetts |
| 11 | Mary E. Callaghan | 77 | Mother | — | Massachusetts |
| 12 | Alice Callaghan | 48 | Sister | — | Massachusetts |
| 13 | Elizabeth Callaghan | 46 | Sister | Collector | Massachusetts |
| 14 | Gerald Callaghan | 32 | Brother | Unpaid Clerk | Massachusetts |
| 15 | Gertrude Ahern | 40 | Sister | — | Massachusetts |
| 16 | Marlene Ahern | 15 | Niece | — | Massachusetts |
| 17 | Robert Ahern | 13 | Nephew | — | Massachusetts |
| 18 | Elizabeth Ahern | 10 | Niece | — | Pennsylvania |
| 19 | William Whall | 42 | Cousin | Lawyer | Massachusetts |
| 20 | Delia F. Gavin | 75 | Head | — | Ireland |
| 21 | John Brady THIS PERSON | 30 | Son | Letter Carrier | Massachusetts |
| 22 | Mary A. Gormley | 50 | Head | Bookkeeper | Massachusetts |
| 23 | Hugh Gormley | 47 | Brother | Chemist | Massachusetts |
| 24 | Annie Desaulniers | 62 | Aunt | — | Newfoundland |
| 25 | Blanche Gormley | 19 | Cousin | — | Massachusetts |
| 26 | William Gormley | 14 | Nephew | — | Massachusetts |
| 27 | Joseph C. Monahan | 42 | Head | Police Officer | Massachusetts |
| 28 | Ellen E. Monahan | 37 | Wife | — | Massachusetts |
| 29 | Leo Monahan | 17 | Son | — | Massachusetts |
| 30 | Eleanor M. Monahan | 15 | Daughter | — | Massachusetts |
| 31 | Benjamin De Wolf | 46 | Head | Longshoreman | Poland |
| 32 | Sarah De Wolf | 44 | Wife | Sewing | Poland |
| 33 | Herbert De Wolf | 22 | Son | Stock Clerk | Massachusetts |
| 34 | Irene De Wolf | 21 | Daughter | Stenographer | Massachusetts |
| 35 | Frank L. Horn | 48 | Head | Police Officer | California |
| 36 | Marie Horn | 48 | Wife | — | Pennsylvania |
| 37 | Claude L. Mckee | 44 | Head | Chauffeur | Indiana |
| 38 | Agnes Mckee | 48 | Wife | — | Massachusetts |
| 39 | Edith M. Mckee | 19 | Daughter | Secretary | Massachusetts |
| 40 | Son Claude M. | None | M | Edison Electric | — |
Pedigree Summary
John
Gen 1 · 5 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)