MR
Mary Roach — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this Mary Roach across the 1930 and 1940 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 7-person household.
Age 1
b. ~1929
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Roach |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada-English |
| Additional Details | |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | City Of Cambridge |
| 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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alice Roach | Daughter | — | 3 | ~1927 |
| Virginia Roach | Daughter | — | 7 | ~1923 |
| Barbara Roach | Daughter | — | 5 | ~1925 |
| Mary Roach | Daughter | — | 1 | ~1929 |
| James Roach | Head | — | 35 | ~1895 |
| Alice Roach | Other | — | 35 | ~1895 |
| James Roach | Son | — | 8 | ~1922 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 1
Middlesex, Massachusetts · implied b. ~1929 — 7 household members
| Surname | Roach |
| Given Name | Mary T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada-English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 11
Middlesex-County, Massachusetts · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Roche |
| Given Name | Mary T |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Wayland |
| 1935 Residence (County) | Middlesex |
| Income (1939) | 0 |
| Highest Grade | Hs 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 Roach across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Roach
Daughter · 1930 · age 1 · b. ~1929 · Massachusetts
★ You are viewing this record
Sibling
Barbara Roach
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Roach
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Roach
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Roach
Sibling · 1930 · age 3
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
48 people indexed on this census page (ia:1930:massachusettscensus00reel916:0512)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Leo Tealing | 28 | Head | Cutter | New York State |
| 52 | Marie Tealing | 7 | Daughter | — | Massachusetts |
| 53 | Elizabeth Tealing | 5 | Daughter | — | Massachusetts |
| 54 | Charles Munroe | 33 | Head | Policeman | Massachusetts |
| 55 | M. Emily Munroe | 31 | Wife-H | — | Massachusetts |
| 56 | Charles L. Munroe | 10 | Son | — | Massachusetts |
| 57 | Walter F. Munroe | 7 | Son | — | Massachusetts |
| 58 | Leonard A. Munroe | 3 | Son | — | Massachusetts |
| 59 | William J. Prouty | 26 | Head | Helper | Massachusetts |
| 60 | Anna L. Prouty | 23 | Wife-H | — | Massachusetts |
| 61 | William Prouty | 1 | Son | — | Massachusetts |
| 62 | Clement C. Healy | 40 | Head | Merchant | Massachusetts |
| 63 | Alice Healy | 32 | Wife-H | — | Massachusetts |
| 64 | Clement F. Healy | 13 | Son | — | Massachusetts |
| 65 | Robert J. Healy | 10 | Son | — | Massachusetts |
| 66 | Alice Healy | 7 | Daughter | — | Massachusetts |
| 67 | Thomas E. Murray | 42 | Head | Chauffeur | Massachusetts |
| 68 | M. H. Murray | 40 | Wife-H | — | Massachusetts |
| 69 | Thomas Murray | 11 | Son | — | Massachusetts |
| 70 | Mary Murray | 9 | Daughter | — | Massachusetts |
| 71 | Isaac Ivey | 51 | Head | Boiler Maker | Scotland |
| 72 | Theresa A. Ivey | 49 | Wife-H | — | Scotland |
| 73 | Isaac R. Ivey | 17 | Son | — | Scotland |
| 74 | Margaret Ivey | 15 | Daughter | — | Scotland |
| 75 | John Ivey | 13 | Son | — | Scotland |
| 76 | James J. Roach | 35 | Head | Ironworker | Massachusetts |
| 77 | Alice H. Roach | 35 | Wife-H | — | Canada-English |
| 78 | James J. Roach | 8 | Son | — | Canada-English |
| 79 | Virginia G. Roach | 7 | Daughter | — | Canada-English |
| 80 | Barbara Roach | 5 | Daughter | — | Canada-English |
| 81 | Alice Roach | 3 | Daughter | — | Massachusetts |
| 82 | Mary T. Roach THIS PERSON | 1 | Daughter | — | Massachusetts |
| 83 | Ray R. Mcphail | 27 | Head | Meter Reader | Massachusetts |
| 84 | Ida Mcphail | 26 | Wife-H | — | New York State |
| 85 | Mary Alice Mcphail | 1 | Daughter | — | Massachusetts |
| 86 | John F. Mccarthy | 30 | Head | Salesman | Massachusetts |
| 87 | Margaret F. Mccarthy | 29 | Wife-H | — | Massachusetts |
| 88 | John F. Mccarthy | 3 | Son | — | Massachusetts |
| 89 | Robert S. Mccarthy | 1 | Son | — | Massachusetts |
| 90 | Nellie Sullivan | 45 | Head | — | New York State |
| 91 | John Sullivan | 19 | Son | Laborer | Massachusetts |
| 92 | Margaret Sullivan | 17 | Daughter | — | Massachusetts |
| 93 | John E. Sweeney | 47 | Head | Millwright | Maine |
| 94 | William Sweeney | 24 | Son | Salesman | New York State |
| 95 | Anna Sweeney | 15 | Daughter | — | New York State |
| 96 | David Maclean | 28 | Head | Manager | Massachusetts |
| 97 | Helen Maclean | 21 | Wife-H | Manager | Massachusetts |
| 98 | Arthur Maclean | 1 | Son | — | 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)