MG
Mary Griffin — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Griffin across the 1920 and 1930 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1915), then head of a 10-person household.
Age 15
b. ~1915
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Griffin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Revere City |
| Est. Birth Year | ~1915 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Griffin | Daughter | — | 2 | ~1928 |
| Mary Griffin | Daughter | — | 15 | ~1915 |
| Catherine Griffin | Daughter | — | 8 | ~1922 |
| Frances Griffin | Daughter | — | 21 | ~1909 |
| John Griffin | Head | — | 40 | ~1890 |
| Thomas Griffin | Son | — | 6 | ~1924 |
| James Griffin | Son | — | 18 | ~1912 |
| Joseph Griffin | Son | — | 11 | ~1919 |
| John Griffin | Son | — | 10 | ~1920 |
| Johanna Griffin | Spouse | — | 41 | ~1889 |
Census Appearances
1920
Suffolk, Massachusetts
Daughter, age 6
Suffolk, Massachusetts · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Daughter, age 15
Suffolk, Massachusetts · implied b. ~1915 — 10 household members
| Surname | Griffin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| 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 Griffin across 2 US Census years (1920 and 1930) in Suffolk, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Griffin
Daughter · 1930 · age 15 · b. ~1915 · Massachusetts
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Sibling
James Griffin
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Griffin
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Griffin
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Griffin
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Griffin
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Griffin
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Griffin
Sibling · 1930 · age 6
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:massachusettscensus00reel961:0138)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | George S Grow | 40 | Head | Operator | Vermont |
| 52 | Jessie E Grow | 39 | Wife | — | Canada-English |
| 53 | Adelphia Grow | 71 | Sister | — | Vermont |
| 54 | Benson Nash | 86 | Head | — | Maine |
| 55 | Ida Nash | 72 | Wife | — | Maine |
| 56 | Sidney Wheeler | 52 | Brother-in-law | Laborer | Maine |
| 57 | Catherine Mcardle | 63 | Head | — | Canada-English |
| 58 | John G Mcardle | 34 | Son | Waiter | Massachusetts |
| 59 | Harold R Mcardle | 31 | Son | Sea Captain | Massachusetts |
| 60 | William Mcardle | 29 | Son | Pharmacist | Massachusetts |
| 61 | Loretta J Mcardle | 28 | Daughter | Switchboard Operator | Massachusetts |
| 62 | Oswald J Mcardle | 26 | Son | Porter | Massachusetts |
| 63 | Charles B Mcardle | 23 | Son | Salesman | Massachusetts |
| 64 | George R Sackett | 62 | Head | Supervisor | Massachusetts |
| 65 | Catherine Sackett | 61 | Wife | — | Massachusetts |
| 66 | Joseph Twohig | 64 | Brother-in-law | Gardener | Massachusetts |
| 67 | Mary Glover | 72 | Head | Janitress | Massachusetts |
| 68 | Madeline Glover | 16 | Daughter | Stock Girl | Massachusetts |
| 69 | Mary Glover | 5 | Daughter | — | Massachusetts |
| 70 | Jacqueline Glover | 2 | Daughter | — | Massachusetts |
| 71 | Margaret Griffin | 65 | Head | — | Irish Free State |
| 72 | Michael Griffin | 33 | Son | Plumber | Massachusetts |
| 73 | Claire Griffin | 14 | Granddaughter | — | Massachusetts |
| 74 | Margaret Buckley | 35 | Daughter | — | Massachusetts |
| 75 | James Hartley | 58 | Lodger | Watchman | Irish Free State |
| 76 | John Griffin | 40 | Head | Clerk | Massachusetts |
| 77 | Johanna Griffin | 41 | Wife | — | Massachusetts |
| 78 | Frances Griffin | 21 | Daughter | Doubler | Massachusetts |
| 79 | James Griffin | 18 | Son | Machine Operator | Massachusetts |
| 80 | Mary Griffin THIS PERSON | 15 | Daughter | — | Massachusetts |
| 81 | Joseph Griffin | 11 | Son | — | Massachusetts |
| 82 | John Griffin | 10 | Son | — | Massachusetts |
| 83 | Catherine Griffin | 8 | Daughter | — | Massachusetts |
| 84 | Thomas Griffin | 6 | Son | — | Massachusetts |
| 85 | Dorothy Griffin | 2 | Daughter | — | Massachusetts |
| 86 | Joseph Atkinson | 43 | Head | City Laborer | Maine |
| 87 | Mary Atkinson | 35 | Wife | — | Massachusetts |
| 88 | Loretta Atkinson | 7 | Daughter | — | Massachusetts |
| 89 | Henry Atkinson | 5 | Son | — | Massachusetts |
| 90 | Paul Atkinson | 4 | Son | — | Massachusetts |
| 91 | Grace Atkinson | 1 | Daughter | — | Massachusetts |
| 92 | Barbara Atkinson | 0 | Daughter | — | Massachusetts |
| 93 | Henry Tracey | 37 | Head | Police Sargent | Massachusetts |
| 94 | Laura Tracey | 33 | Wife | — | Massachusetts |
| 95 | H Marshall Tracey | 10 | Son | — | Massachusetts |
| 96 | Frederick W Tracey | 9 | Son | — | Massachusetts |
| 97 | Arthur Blaisdell | 41 | Head | Starter | Maine |
| 98 | Lottie Blaisdell | 31 | Wife | — | Canada-English |
| 99 | Myrtle Hanson | 19 | Stepdaughter | Typist | Massachusetts |
| 100 | Rita Glover | 11 | Daughter | — | 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)