JG
John Geary — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Geary across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1905), then head of a 6-person household.
Age 35
b. ~1905
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Geary |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Yardmaster |
| Industry | Undertaking |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 1500 |
| Highest Grade | H-4 |
| 1935 Residence | Mass |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Yardmaster |
| Township / Ward | Medford City |
| Est. Birth Year | ~1905 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Phyllis Geary | Daughter | — | 35 | ~1905 |
| Kathleen Geary | Daughter | — | 32 | ~1908 |
| Camilla Geary | Daughter | — | 26 | ~1914 |
| John Geary | Son | — | 35 | ~1905 |
| Thomas Geary | Son | — | 34 | ~1906 |
| Ella Geary | Head | — | 65 | ~1875 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 25
Suffolk, Massachusetts · implied b. ~1905 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Geary |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 21 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Blacksmith |
| Industry | Sugar Refinery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 35
Middlesex-County, Massachusetts · implied b. ~1905 — 6 household members
| Surname | Geary |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Occupation | Yardmaster |
| Industry | Undertaking |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 1500 |
| Highest Grade | H-4 |
| 1935 Residence | Mass |
| 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 35 · b. ~1905 · Massachusetts
★ You are viewing this record
Sibling
Thomas Geary
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Phyllis Geary
Sibling · 1940 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Geary
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Camilla Geary
Sibling · 1940 · age 26
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01611-00552)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fred Jordan Brown | 65 | Head | Salesman | Maine |
| 2 | Helen J. M. Brown | 61 | Wife | — | Massachusetts |
| 3 | George F. Andrew | 44 | Head | Office Manager | Washington |
| 4 | Evelyn M. Andrew | 42 | Wife | — | Vermont |
| 5 | Hjalmar Sandgren | 46 | Head | Painter | Sweden |
| 6 | Nannie Sandgren | 49 | Wife | — | Sweden |
| 7 | Doris L. Sandgren | 26 | Daughter | Secretary | Massachusetts |
| 8 | Dorothy E. Sandgren | 23 | Daughter | Checker | Massachusetts |
| 9 | Andrew J. Sandgren | 21 | Son | Machinist | Massachusetts |
| 10 | Muriel Sandgren | 20 | Daughter | Typist | Massachusetts |
| 11 | Mildred M. Sandgren | 17 | Daughter | — | Massachusetts |
| 12 | Ella F. Geary | 65 | Head | — | Massachusetts |
| 13 | Phyllis Geary | 35 | Daughter | Teacher | Massachusetts |
| 14 | Thomas J. Geary | 34 | Son | Clerk - P. Office | Massachusetts |
| 15 | Kathleen Geary | 32 | Daughter | Teacher | Massachusetts |
| 16 | John Geary THIS PERSON | 35 | Son | Yardmaster | Massachusetts |
| 17 | Camilla Geary | 26 | Daughter | — | Massachusetts |
| 18 | Louis E. Bell | 50 | Head | Salesman | Massachusetts |
| 19 | Elizabeth Bell | 42 | Wife | Manager | Massachusetts |
| 20 | Eleanor Bell | 10 | Daughter | — | Massachusetts |
| 21 | Savino Cardinal | 46 | Head | Store Manager | Italy |
| 22 | Angela Cardinal | 40 | Wife | — | Italy |
| 23 | Rita Cardinal | 20 | Daughter | New Worker | Massachusetts |
| 24 | Jean Cardinal | 19 | Daughter | Typist | Massachusetts |
| 25 | Arthur Cardinal | 16 | Son | — | Massachusetts |
| 26 | Savino Jr. Cardinal | 14 | Son | — | Massachusetts |
| 27 | Grace Magner | 48 | Head | — | France |
| 28 | William Crosby | 36 | Son | Telephone Supervisor | Massachusetts |
| 29 | Dorothy Crosby | 30 | Daughter-in-law | — | Massachusetts |
| 30 | Lloyd B. Hunter | 58 | Head | Paper Cutter | Massachusetts |
| 31 | Maida Hunter | 43 | Wife | — | Massachusetts |
| 32 | Charles Hunter | 14 | Son | — | Massachusetts |
| 33 | Louis Hayes | 45 | Head | Agent | Massachusetts |
| 34 | Sara Hayes | 44 | Mother | — | New York |
| 35 | Phebe Hayes | 22 | Daughter | — | New York |
| 36 | Dorothy Hayes | 14 | Daughter | — | Massachusetts |
| 37 | Frances Hayes | 10 | Daughter | — | Massachusetts |
| 38 | Mina Walsh | 26 | Maid | — | Irish Free State |
| 39 | Edward Fitzgerald | 30 | Head | Bricklayer | Massachusetts |
| 40 | Nancy Fitzgerald | 25 | Wife | — | 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)