JG
John Geary — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Geary across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Geary |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston |
| Est. Birth Year | ~1926 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Dennis Geary | Head | — | 44 | ~1896 |
| Justina Geary | Daughter | — | 15 | ~1925 |
| Barbara Geary | Daughter | — | 6 | ~1934 |
| Dennis Geary | Son | — | 8 | ~1932 |
| Mary Geary | Spouse | — | 42 | ~1898 |
| Ellen Geary | Daughter | — | 12 | ~1928 |
| John Geary | Son | — | 14 | ~1926 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 3
Middlesex, Massachusetts · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Geary |
| Given Name | John F Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 14
Suffolk-County, Massachusetts · implied b. ~1926 — 7 household members
| Surname | Geary |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Industry | 0 |
| Highest Grade | No 8 |
| 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 John Geary across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Geary
Son · 1940 · age 14 · b. ~1926 · Massachusetts
★ You are viewing this record
Sibling
Barbara Geary
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dennis Geary
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Justina Geary
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen Geary
Sibling · 1940 · age 12
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
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
24 people indexed on this census page (nara:1940:m-t0627-01675-00049)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arthur J. Mcgrath | 13 | Son | — | Massachusetts |
| 42 | Joseph Mcginnis | 72 | Head | — | Prince Edward Island |
| 43 | Annabelle Mcginnis | 72 | Wife | — | Prince Edward Island |
| 44 | Mary C. Mcginnis | 48 | Daughter | Typist | Massachusetts |
| 45 | Catherine G. Mccormack | 35 | Niece | Typist | Massachusetts |
| 46 | Agnes M. Mccormack | 33 | Niece | Typist | Massachusetts |
| 47 | Harold Mcginnis | 18 | Grandson | Attendant | Massachusetts |
| 48 | Dennis Geary | 44 | Head | Porter | Ireland (Eire) |
| 49 | Mary Geary | 42 | Wife | — | Ireland (Eire) |
| 50 | Justina M. Geary | 15 | Daughter | Typist | Ireland (Eire) |
| 51 | John Jr. Geary THIS PERSON | 14 | Son | — | Massachusetts |
| 52 | Ellen Geary | 12 | Daughter | — | Massachusetts |
| 53 | Dennis Geary | 8 | Son | — | Massachusetts |
| 54 | Barbara Geary | 6 | Daughter | — | Massachusetts |
| 55 | Frederick Gaunt | 38 | Head | Ship-Fitter | Massachusetts |
| 56 | Marguerite Gaunt | 12 | Daughter | — | Massachusetts |
| 57 | Jean Gaunt | 10 | Daughter | — | Massachusetts |
| 58 | Eleanor Walper | 26 | Head | Professional Singer | Massachusetts |
| 59 | Extra Walper | None | Line | — | — |
| 60 | Mary V. Horne | 57 | Head | Practical Nurse | Massachusetts |
| 61 | Georgia L. Horne | 26 | Daughter | Teacher (Substitute) | Massachusetts |
| 62 | James Fitzgerald | 35 | Head | Asst. Engineer | Massachusetts |
| 63 | Dorothy Fitzgerald | 36 | Wife | — | Massachusetts |
| 64 | Elizabeth Gallagher | 50 | Aunt | Dietitian | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)