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Mary Grady — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Grady across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 7-person household.
Age 11
b. ~1929
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Grady |
| Given Name | Mary T |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1929 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Eileen Grady | Daughter | — | 8 | ~1932 |
| Helen Grady | Spouse | — | 41 | ~1899 |
| Anne Grady | Daughter | — | 6 | ~1934 |
| Mary Grady | Daughter | — | 11 | ~1929 |
| C Grady | Daughter | — | 4 | ~1936 |
| John Grady | Head | — | 41 | ~1899 |
| Daniel Grady | Son | — | 1 | ~1939 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 2
Suffolk, Massachusetts · implied b. ~1928 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 11
Suffolk-County, Massachusetts · implied b. ~1929 — 7 household members
| Surname | Grady |
| Given Name | Mary T |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | No 5 |
| 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 Mary Grady across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Grady
Daughter · 1940 · age 11 · b. ~1929 · Massachusetts
★ You are viewing this record
Sibling
Anne Grady
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Grady
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eileen Grady
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
C Grady
Sibling · 1940 · age 4
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-t0627-01668-00612)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nicholas Bono | 23 | Son | Counterman | Massachusetts |
| 2 | Leo Bono | 20 | Son | Baker | Massachusetts |
| 3 | Pauline Bono | 18 | Daughter | Clerk-Sales | Massachusetts |
| 4 | Patrick Carey | 40 | Head | Laborer | Ireland |
| 5 | Mary B Carey | 39 | Wife | — | Ireland |
| 6 | Julia T Carey | 10 | Daughter | — | Massachusetts |
| 7 | Margaret M Carey | 5 | Daughter | — | Massachusetts |
| 8 | John F. Carey | 3 | Son | — | Massachusetts |
| 9 | George E Hurley | 55 | Head | Folder | Canada Eng |
| 10 | Mary K Hurley | 55 | Wife | — | Ireland |
| 11 | Mary A. Hurley | 19 | Daughter | Stenographer | Massachusetts |
| 12 | Patrick J. Hurley | 61 | Brother | Car Cleaner | Ireland |
| 13 | Michael J. O'Connor | 38 | Head | Shipper | Ireland |
| 14 | Bridget M O'Connor | 40 | Wife | — | Ireland |
| 15 | Francis M O'Connor | 8 | Son | — | Massachusetts |
| 16 | Honora M O'Connor | 6 | Daughter | — | Massachusetts |
| 17 | Mary L O'Connor | 4 | Daughter | — | Massachusetts |
| 18 | Daniel P Kinehan | 89 | Head | — | Ireland |
| 19 | Mary J. Kinehan | 78 | Wife | — | Massachusetts |
| 20 | John H. Touhey | 40 | Head | Chauffeur | Massachusetts |
| 21 | Bernice A. M. Touhey | 34 | Wife | — | New York |
| 22 | Bernice A. Touhey | 3 | Daughter | — | Massachusetts |
| 23 | John J. Grady | 41 | Head | Laborer | Ireland |
| 24 | Helen Grady | 41 | Wife | — | Ireland |
| 25 | Mary T Grady THIS PERSON | 11 | Daughter | — | Massachusetts |
| 26 | Eileen P. Grady | 8 | Daughter | — | Massachusetts |
| 27 | Anne M. Grady | 6 | Daughter | — | Massachusetts |
| 28 | C. Rita Grady | 4 | Daughter | — | Massachusetts |
| 29 | Daniel F Grady | 1 | Son | — | Massachusetts |
| 30 | Joseph D. Falvey | 42 | Head | Woolen Spinner | New Hampshire |
| 31 | Cecilia A. Falvey | 31 | Wife | — | Canada Eng |
| 32 | Robert J. Falvey | 6 | Son | — | Massachusetts |
| 33 | George H. Spiegel | 66 | Head | Cutter | Germany |
| 34 | Henrietta M. Spiegel | 63 | Wife | — | Massachusetts |
| 35 | Daniel R Curley | 40 | Head | Bottle Capper | Canada Eng |
| 36 | Celia M Curley | 37 | Wife | — | Canada Eng |
| 37 | Lorraine M Curley | 7 | Daughter | — | Massachusetts |
| 38 | Robert D Curley | 4 | Son | — | Massachusetts |
| 39 | Eileen C Trainer | 37 | Sister-in-law | Examiner | Canada Eng |
| 40 | Kurt A. Nagel | 34 | Head | Chauffeur | Germany |
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)