MG
Mary Grady — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Grady across the 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1907), then head of a 7-person household.
Age 23
b. ~1907
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Grady |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Medford City |
| Est. Birth Year | ~1907 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Grady | Daughter | — | 23 | ~1907 |
| Francis Grady | Son | — | 25 | ~1905 |
| Frank Grady | Head | — | 63 | ~1867 |
| C Grady | Daughter | — | 21 | ~1909 |
| Eleanor Grady | Daughter | — | 18 | ~1912 |
| John Grady | Son | — | 16 | ~1914 |
| Ella Grady | Other | — | 53 | ~1877 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 12
Middlesex, Massachusetts · implied b. ~1908 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | New York |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 23
Middlesex, Massachusetts · implied b. ~1907 — 7 household members
| Surname | Grady |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| 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 |
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 (1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Grady
Daughter · 1930 · age 23 · b. ~1907 · Massachusetts
★ You are viewing this record
Sibling
Eleanor Grady
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Grady
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Grady
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
C Grady
Sibling · 1930 · age 21
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
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel924:0855)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lily R. Flynn | 51 | Wife-H | — | Canada English |
| 2 | Joseph A. Greer | 30 | Son-in-law | Lawyer | Massachusetts |
| 3 | Ruth C. Greer | 30 | Daughter | — | Newfoundland |
| 4 | Mary R. Greer | 1 | Granddaughter | — | Massachusetts |
| 5 | Isidore H. Risman | 53 | Head | Real Estate | Russia |
| 6 | Jennie Risman | 53 | Wife-H | — | Russia |
| 7 | Louis J. Risman | 23 | Son | Accountant | Massachusetts |
| 8 | Dora R. Risman | 22 | Daughter | — | Massachusetts |
| 9 | Mable H. Croudis | 62 | Head-H | — | Massachusetts |
| 10 | Frances Brown | 50 | Roomer | Manager | Canada English |
| 11 | Annie E. Croudis | 26 | Niece | — | Canada English |
| 12 | Ernest R. Whitcomb | 43 | Head | Attorney | Massachusetts |
| 13 | Mildred W. Whitcomb | 43 | Wife-H | — | Massachusetts |
| 14 | Irvine E. Whitcomb | 18 | Son | — | Massachusetts |
| 15 | Emma F. Whitcomb | 78 | Mother | — | New Hampshire |
| 16 | Frank E. Grady | 63 | Head | Manager | Massachusetts |
| 17 | Ella V. Grady | 53 | Wife-H | — | New York |
| 18 | Francis J. G. Grady | 25 | Son | — | Massachusetts |
| 19 | Mary F. Grady THIS PERSON | 23 | Daughter | — | Massachusetts |
| 20 | C. Alma Grady | 21 | Daughter | — | Massachusetts |
| 21 | Eleanor V. Grady | 18 | Daughter | — | Massachusetts |
| 22 | John J. Grady | 16 | Son | — | Massachusetts |
| 23 | Andrew F. Curtin | 65 | Head | Manufacturer | Massachusetts |
| 24 | Theresa A. Curtin | 63 | Wife-H | — | Massachusetts |
| 25 | Andrew F. Jr. Curtin | 33 | Son | Manager | Massachusetts |
| 26 | Bernice C. Curtin | 28 | Daughter | Teacher | Massachusetts |
| 27 | Roquetta M. Curtin | 24 | Daughter | Teacher | Massachusetts |
| 28 | Allen P. Chase | 47 | Head | Partner | Massachusetts |
| 29 | Mary D. Chase | 46 | Wife-H | — | Massachusetts |
| 30 | Mary H. Chase | 20 | Daughter | — | Massachusetts |
| 31 | Rhoda Macleod | 45 | Servant | Maid | Canada English |
| 32 | Roland T. Breese | 43 | Head | Superintendent | So. Carolina |
| 33 | Jewell C. Breese | 40 | Wife-H | — | Kentucky |
| 34 | Ruth Breese | 20 | Daughter | — | Georgia |
| 35 | Richard S. Breese | 2 | Son | — | Massachusetts |
| 36 | Agnes E. Wolfe | 70 | Head-H | — | Germany |
| 37 | Martha Wolfe | 40 | Daughter | Accountant | Massachusetts |
| 38 | Anne S. Wolfe | 35 | Daughter | Secretary | Massachusetts |
| 39 | William J. Healey | 39 | Head | Superintendent | Massachusetts |
| 40 | Catherine E. Healey | 40 | Wife-H | — | Massachusetts |
| 41 | Mary L. Healey | 10 | Daughter | — | Massachusetts |
| 42 | Michael C. Kelliher | 32 | Cousin | Lawyer | Rhode Island |
| 43 | Fred A. Rines | 59 | Head | Marketman | Maine |
| 44 | Maud S. Rines | 51 | Wife-H | — | Canada English |
| 45 | James A. Dunbar | 42 | Head | Teacher | Massachusetts |
| 46 | Anne G. Dunbar | 40 | Wife-H | — | Massachusetts |
| 47 | Joan Dunbar | 8 | Daughter | — | Massachusetts |
| 48 | Collette Dunbar | 7 | Daughter | — | Massachusetts |
| 49 | Paul Dunbar | 2 | Son | — | Massachusetts |
| 50 | James A. Dunnell | 83 | Head | — | Maine |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)