JM
John Maguire — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Maguire across the 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1900), then head of a 8-person household.
Age 30
b. ~1900
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Maguire |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Clerk |
| Industry | Post Office |
| Class of Worker | W |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerk |
| Township / Ward | Cambridge City |
| Est. Birth Year | ~1900 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Maguire | Head | — | 57 | ~1873 |
| Eileen Maguire | Daughter | — | 14 | ~1916 |
| Emily Maguire | Daughter | — | 27 | ~1903 |
| John Maguire | Son | — | 30 | ~1900 |
| Albert Maguire | Son | — | 19 | ~1911 |
| Harold Maguire | Son | — | 25 | ~1905 |
| Milton Maguire | Son | — | 22 | ~1908 |
| Mary Maguire | Spouse | — | 54 | ~1876 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 21
Middlesex, Massachusetts · implied b. ~1899 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maguire |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Clerk |
| Industry | Shoe Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 30
Middlesex, Massachusetts · implied b. ~1900 — 8 household members
| Surname | Maguire |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Clerk |
| Industry | Post Office |
| Class of Worker | W |
| 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 John Maguire across 2 US Census years (1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
John Maguire
Son · 1930 · age 30 · b. ~1900 · Massachusetts
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Sibling
Eileen Maguire
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Maguire
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Maguire
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Milton Maguire
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Emily Maguire
Sibling · 1930 · age 27
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:1930:15thcensuspopula917unit:0335)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patrick Riley | 52 | Head | Salesman | Massachusetts |
| 2 | Thomas Riley | 50 | Brother | Laborer | Massachusetts |
| 3 | Sarah A. M. Riley | 47 | Sister | — | Massachusetts |
| 4 | John Maguire | 57 | Head | Teamster | Massachusetts |
| 5 | Mary Maguire | 54 | Wife | — | Massachusetts |
| 6 | John Maguire THIS PERSON | 30 | Son | Clerk | Massachusetts |
| 7 | Emily Maguire | 27 | Daughter | Clerk | Massachusetts |
| 8 | Harold Maguire | 25 | Son | — | Massachusetts |
| 9 | Milton Maguire | 22 | Son | — | Massachusetts |
| 10 | Albert Maguire | 19 | Son | — | Massachusetts |
| 11 | Eileen Maguire | 14 | Daughter | — | Massachusetts |
| 12 | John H. Foster | 52 | Head | — | Massachusetts |
| 13 | Margaret M. Foster | 54 | Wife | Teacher | Massachusetts |
| 14 | Mildred Foster | 21 | Daughter | Stenographer | Massachusetts |
| 15 | James J. Donahue | 47 | Brother-in-law | Salesman | Maine |
| 16 | Catherine Donahue | 47 | Sister | — | Massachusetts |
| 17 | Ralph M. Donahue | 21 | Nephew | Salesman | Massachusetts |
| 18 | Daniel Dolan | 38 | Head | Truck Driver | New York |
| 19 | Mary M. Dolan | 35 | Wife | — | Massachusetts |
| 20 | Mary Dolan | 12 | Daughter | — | Massachusetts |
| 21 | Helen Dolan | 10 | Daughter | — | Massachusetts |
| 22 | Catherine Dolan | 8 | Daughter | — | Massachusetts |
| 23 | Daniel Dolan | 4 | Son | — | Massachusetts |
| 24 | James Finnegan | 50 | Head | Inventory | Massachusetts |
| 25 | Hannah M. Finnegan | 48 | Wife | — | Massachusetts |
| 26 | James Finnegan | 24 | Son | — | Massachusetts |
| 27 | Elizabeth Finnegan | 19 | Daughter | — | Massachusetts |
| 28 | James J. Finnegan | 13 | Son | — | Massachusetts |
| 29 | Peter J. Brooks | 49 | Head | Salesman | Russia |
| 30 | Hannah M. Brooks | 41 | Wife | — | Massachusetts |
| 31 | Margaret Brooks | 18 | Daughter | — | Massachusetts |
| 32 | Sarah Brooks | 17 | Daughter | — | Massachusetts |
| 33 | Rita Brooks | 15 | Daughter | — | Massachusetts |
| 34 | William Brooks | 14 | Son | — | Massachusetts |
| 35 | Harvey Brooks | 12 | Son | — | Massachusetts |
| 36 | George Brooks | 10 | Son | — | Massachusetts |
| 37 | Bessie Cofman | 69 | Mother-in-law | — | Massachusetts |
| 38 | Mary Cofman | 45 | Sister-in-law | Tailor | Massachusetts |
| 39 | Peter J. Brooks | 38 | Head | Gardener | New York |
| 40 | Annie Brooks | 35 | Wife | — | Massachusetts |
| 41 | William Brooks | 12 | Son | — | Massachusetts |
| 42 | Isaac J. Smith | 52 | Head | Painter | Massachusetts |
| 43 | Alice B. Smith | 50 | Wife | — | Massachusetts |
| 44 | James P. Smith | 22 | Son | Truck Driver | Massachusetts |
| 45 | Mary Shea | 50 | Head | — | Massachusetts |
| 46 | Alice Margaret Shea | 25 | Daughter | Laborer | Massachusetts |
| 47 | Helen Shea | 23 | Daughter | Laborer | Massachusetts |
| 48 | Gertrude Shea | 18 | Daughter | Laborer | Massachusetts |
| 49 | John J. Flaherty | 45 | Head | Blacksmith | Massachusetts |
| 50 | Mary Flaherty | 43 | Wife | — | Ireland |
Related Census Records
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)