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 spouse (b.~1876), then head of a 7-person household.
Age 54
b. ~1876
Female
Spouse
Born: Ireland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Grady |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1894 |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Medford City |
| Est. Birth Year | ~1876 |
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 | Spouse | — | 54 | ~1876 |
| Theresa Grady | Daughter | — | 29 | ~1901 |
| Joseph Grady | Son | — | 13 | ~1917 |
| Catherine Grady | Daughter | — | 17 | ~1913 |
| Peter Grady | Head | — | 55 | ~1875 |
| Mary Grady | Daughter | — | 25 | ~1905 |
| William Grady | Son | — | 23 | ~1907 |
Census Appearances
1920
Middlesex, Massachusetts
Spouse, age 45
Middlesex, Massachusetts · implied b. ~1875 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | 1904 |
| Birth Country | Ireland |
| Year of Naturalization | 1890 |
| Birthplace (normalized) | ireland |
1930
Middlesex, Massachusetts
Spouse, age 54
Middlesex, Massachusetts · implied b. ~1876 — 7 household members
| Surname | Grady |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1894 |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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.
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This person
Anchor record
Mary Grady
Spouse · 1930 · age 54 · b. ~1876 · Massachusetts
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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:massachusettscensus00reel924:0237)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jean M. O'Connor | 4 | Daughter | None | Massachusetts |
| 2 | Edward O'Connor | 1 | Son | None | Massachusetts |
| 3 | Robert O'Connor | 0 | Son | None | Massachusetts |
| 4 | Edward J. Lacey | 49 | Head | Rubber Worker | Ireland |
| 5 | Agnes E. Lacey | 44 | Wife | None | Massachusetts |
| 6 | Edward P. Lacey | 7 | Son | None | Massachusetts |
| 7 | Agnes O'Brien | 67 | Mother-in-law | None | England |
| 8 | Louis K. Libby | 65 | Head | None | Louisiana |
| 9 | Edith F. Libby | 63 | Wife | None | Maine |
| 10 | Roy J. Libby | 33 | Son | Last Maker | Massachusetts |
| 11 | Chester M. Libby | 22 | Son | Store Manager | Massachusetts |
| 12 | Myrtle E. Libby | 33 | Daughter-in-law | None | Ohio |
| 13 | Marguerite E. A. Libby | 12 | Grand daughter | None | New York |
| 14 | Paul R. Libby | 9 | Grand son | None | Massachusetts |
| 15 | Leonard K. Libby | 2 | Grand son | None | Massachusetts |
| 16 | Louis L. Bel Blair | 53 | Head | China Repairer | Massachusetts |
| 17 | Jane F. Bel Blair | 53 | Wife | None | Massachusetts |
| 18 | Edward J. Bel Blair | 21 | Son | China Repairer | Massachusetts |
| 19 | Elfrida M. Bel Blair | 19 | Daughter | Steno & Typist | Massachusetts |
| 20 | Evelyn C. Bel Blair | 16 | Daughter | None | Massachusetts |
| 21 | Francis X. Bel Blair | 14 | Son | None | Massachusetts |
| 22 | Teresa Bel Blair | 59 | Sister | Rubber Worker | Massachusetts |
| 23 | Ellen Doherty | 69 | Maid | None | Massachusetts |
| 24 | Clifford B. Hardy | 29 | Head | Electrician Helper | New Hampshire |
| 25 | Muriel A. Hardy | 27 | Wife | None | Canada English |
| 26 | George S. Sloan | 20 | Brother-in-law | Book Keeper | Canada English |
| 27 | Patrick J. Healy | 36 | Head | Machinist | Ireland |
| 28 | Anna P. Healy | 32 | Wife | None | Ireland |
| 29 | Mary F. Healy | 1 | Daughter | None | Massachusetts |
| 30 | Joseph F. Hickey | 38 | Head | Retail Salesman | Massachusetts |
| 31 | Elizabeth Hickey | 40 | Wife | None | Massachusetts |
| 32 | Mary Hickey | 9 | Daughter | None | Massachusetts |
| 33 | Elizabeth Hickey | 5 | Daughter | None | Massachusetts |
| 34 | Charles Hickey | 1 | Son | None | Massachusetts |
| 35 | Peter Grady | 55 | Head | Inspector | Ireland |
| 36 | Mary Grady THIS PERSON | 54 | Wife | None | Ireland |
| 37 | Theresa B. Grady | 29 | Daughter | Office Clerk | Massachusetts |
| 38 | Mary A. Grady | 25 | Daughter | Typist | Massachusetts |
| 39 | William F. Grady | 23 | Son | Mechanics Helper | Massachusetts |
| 40 | Catherine J. Grady | 17 | Daughter | None | Massachusetts |
| 41 | Joseph Grady | 13 | Son | None | Massachusetts |
| 42 | Hannah Noonan | 57 | Head | None | Ireland |
| 43 | Loretta M. Noonan | 32 | Daughter | Office Clerk | Massachusetts |
| 44 | Hugh J. Noonan | 30 | Son | Letter Carrier | Massachusetts |
| 45 | Alice R. Noonan | 27 | Daughter | Office Worker | Massachusetts |
| 46 | William L. Marnell | 46 | Head | Railway Postal Clerk | Massachusetts |
| 47 | Mary G. Marnell | 45 | Wife | None | Massachusetts |
| 48 | William L. Jr. Marnell | 12 | Son | None | Massachusetts |
| 49 | Richard J. Marnell | 72 | Head | Retail Salesman | Massachusetts |
| 50 | Mary L. Marnell | 42 | Daughter | Stenographer | Massachusetts |
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)