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Mary Mcdermott — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Mcdermott across the 1920 and 1930 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1911), then head of a 9-person household.
Age 19
b. ~1911
Female
Daughter
Born: Mass
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | McDERMOTT |
| Given Name | MARY |
| Relationship to Head | DAUGHTER |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Mass |
| Father's Birthplace | Mass |
| Mother's Birthplace | Mass |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
| Township / Ward | Boston City |
| Est. Birth Year | ~1911 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alice Mcdermott | Daughter | — | 17 | ~1913 |
| Mary Mcdermott | Daughter | — | 19 | ~1911 |
| Margaret Mcdermott | Daughter | — | 26 | ~1904 |
| Ann Mcdermott | Daughter | — | 25 | ~1905 |
| Sally Mcdermott | Daughter | — | 15 | ~1915 |
| Helen Mcdermott | Daughter | — | 7 | ~1923 |
| Josephine Mcdermott | Daughter | — | 10 | ~1920 |
| Thomas Mcdermott | Head | — | 53 | ~1877 |
| Annie Mcdermott | Spouse | — | 49 | ~1881 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 10
Suffolk, Massachusetts · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Mass |
| Father's Birthplace | Mass |
| Mother's Birthplace | Mass |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
1930
Suffolk, Massachusetts
Daughter, age 19
Suffolk, Massachusetts · implied b. ~1911 — 9 household members
| Surname | McDERMOTT |
| Given Name | MARY |
| Relationship to Head | DAUGHTER |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Mass |
| Father's Birthplace | Mass |
| Mother's Birthplace | Mass |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
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 Mcdermott across 2 US Census years (1920 and 1930) in Suffolk, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcdermott
Daughter · 1930 · age 19 · b. ~1911 · Massachusetts
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Sibling
Josephine Mcdermott
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Mcdermott
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mcdermott
Sibling · 1930 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcdermott
Sibling · 1930 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sally Mcdermott
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Mcdermott
Sibling · 1930 · age 17
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 — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel954:0904)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Cyril Stewart | 40 | HEAD | Furniture Dealer | Mass |
| 52 | Isabel Stewart | 38 | WIFE | — | Mass |
| 53 | Dorothy Stewart | 14 | DAUGHTER | — | Mass |
| 54 | Herbert Stewart | 11 | SON | — | Mass |
| 55 | Virginia Parsons | 11 | COUSIN | Waitress | Mass |
| 56 | Percy Reid | 39 | HEAD | Carpenter | Northern Ireland |
| 57 | Margaret Reid | 25 | WIFE | — | Northern Ireland |
| 58 | Marjorie Reid | 1 | DAUGHTER | — | Mass |
| 59 | Festus Joyce | 27 | LODGER | Janitor | Irish Free State |
| 60 | John Dunn | 32 | HEAD | Dishwasher | Mass |
| 61 | Patricia Dunn | 21 | WIFE | — | Mass |
| 62 | Patricia Dunn | 0 | DAUGHTER | — | Mass |
| 63 | Thomas Mcdermott | 53 | HEAD | Soap Maker | Mass |
| 64 | Annie Mcdermott | 49 | WIFE | — | Mass |
| 65 | Margaret Mcdermott | 26 | DAUGHTER | Stenographer | Mass |
| 66 | Ann Mcdermott | 25 | DAUGHTER | Stenographer | Mass |
| 67 | Mary Mcdermott THIS PERSON | 19 | DAUGHTER | — | Mass |
| 68 | Alice Mcdermott | 17 | DAUGHTER | — | Mass |
| 69 | Sally Mcdermott | 15 | DAUGHTER | — | Mass |
| 70 | Josephine Mcdermott | 10 | DAUGHTER | — | Mass |
| 71 | Helen Mcdermott | 7 | DAUGHTER | — | Mass |
| 72 | Margaret Kearney | 34 | HEAD | — | Mass |
| 73 | Lillian Kearney | 26 | SISTER | Teacher | Mass |
| 74 | Ella Touhie | 28 | BOARDER | Nurse | Mass |
| 75 | Arthur Callahan | 34 | HEAD | Custodian | Mass |
| 76 | Helen Callahan | 33 | WIFE | — | Mass |
| 77 | John Callahan | 5 | SON | — | Mass |
| 78 | Mary Callahan | 3 | DAUGHTER | — | Mass |
| 79 | Gay Callahan | 1 | DAUGHTER | — | Mass |
| 80 | Arthur Evans | 65 | HEAD | Watchman | Mass |
| 81 | Mary Evans | 65 | WIFE | — | Mass |
| 82 | George Evans | 35 | SON | Health Clerk | Mass |
| 83 | Frank Cheney | 37 | HEAD | Lineman | Mass |
| 84 | Ceciala Cheney | 35 | WIFE | — | Mass |
| 85 | John Cheney | 7 | SON | — | Mass |
| 86 | Frank Cheney | 5 | SON | — | Mass |
| 87 | Catherine Cheney | 3 | DAUGHTER | — | Mass |
| 88 | Ellen Shea | 52 | HEAD | — | Mass |
| 89 | Daniel Shea | 33 | SON | Packer | Mass |
| 90 | Mary Shea | 28 | DAUGHTER | Stenographer | Mass |
| 91 | John Shea | 27 | SON | Clerk | Mass |
| 92 | Timothy Shea | 25 | SON | Trucking | Mass |
| 93 | Francis Shea | 23 | SON | Clerk | Mass |
| 94 | James V. Shea | 21 | SON | Mechanic | Mass |
| 95 | William Shea | 18 | SON | Clerk | Mass |
| 96 | George Shea | 17 | SON | Messenger | Mass |
| 97 | Grace Shea | 16 | SON | — | Mass |
| 98 | Elizabeth Moynihan | 47 | SISTER | Clerk | Mass |
| 99 | Charles Lavache | 45 | HEAD | Painter | Nova Scotia |
| 100 | Etta Lavache | 45 | WIFE | Proof Reader | Nova Scotia |
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)