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Robert Hammond — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Robert Hammond across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Hammond |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Winchester |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Arlington |
| Est. Birth Year | ~1925 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Hammond | Son | — | 15 | ~1925 |
| John Hammond | Son | — | 22 | ~1918 |
| Thomas Hammond | Head | — | 46 | ~1894 |
| Leo Hammond | Son | — | 13 | ~1927 |
| Warren Hammond | Son | — | 16 | ~1924 |
| Agnes Hammond | Spouse | — | 46 | ~1894 |
| Joseph Hammond | Son | — | 19 | ~1921 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 5
Middlesex, Massachusetts · implied b. ~1925 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hammond |
| Given Name | Robert J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 15
Middlesex-County, Massachusetts · implied b. ~1925 — 7 household members
| Surname | Hammond |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Winchester |
| 1935 Residence (County) | Middlesex |
| Highest Grade | 6 |
| 1935 Residence | Massachusetts |
| 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 Robert Hammond across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Hammond
Son · 1940 · age 15 · b. ~1925 · Massachusetts
★ You are viewing this record
Sibling
Leo Hammond
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Warren Hammond
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Hammond
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Hammond
Sibling · 1940 · age 19
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-t0627-01601-00340)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John M. Mcgovern | 38 | Head | Shipper | Massachusetts |
| 42 | Agnes H. Mcgovern | 34 | Wife | — | Massachusetts |
| 43 | Frederick Comerford | 35 | Lodger | Houseman | Massachusetts |
| 44 | James P. Coyne | 48 | Head | Chauffer | Massachusetts |
| 45 | Mae T. Coyne | 50 | Wife | — | Irish Free State |
| 46 | Mae E. Coyne | 23 | Daughter | — | Massachusetts |
| 47 | Garritt J. Sullivan | 50 | Lodger | Laborer | Massachusetts |
| 48 | Joseph G. Martin | 27 | Head | Salesman | Massachusetts |
| 49 | Elizabeth Martin | 25 | Wife | — | Massachusetts |
| 50 | Patricia A. Martin | 3 | Daughter | — | Michigan |
| 51 | Nancy E. Martin | 1 | Daughter | — | Massachusetts |
| 52 | Catherine O'Connor | 66 | Mother-in-law | — | Irish Free State |
| 53 | Philip Heaney | 77 | Head | — | Irish Free State |
| 54 | Mary H. Heaney | 77 | Wife | — | Irish Free State |
| 55 | James P. Heaney | 49 | Son | Laborer | Massachusetts |
| 56 | Agnes G. Heaney | 43 | Daughter | Clerk | Massachusetts |
| 57 | Joseph Welch | 34 | Head | Landscape | Massachusetts |
| 58 | James E. Mccarthy | 46 | Head | Salesman | Massachusetts |
| 59 | Marion S. Mccarthy | 52 | Wife | — | Massachusetts |
| 60 | James E. Jr. Mccarthy | 11 | Son | — | Massachusetts |
| 61 | Henry H. Rouse | 51 | Head | Plumber | Massachusetts |
| 62 | Mary A. Rouse | 34 | Wife | — | Canada-Eng |
| 63 | Gregory J. Rouse | 16 | Son | — | Massachusetts |
| 64 | Harold C. Rouse | 12 | Son | — | Massachusetts |
| 65 | Thomas J. Hammond | 46 | Head | Chauffer | Canada-Eng |
| 66 | Agnes M. Hammond | 46 | Wife | — | Massachusetts |
| 67 | John Hammond | 22 | Son | Asst. Baker | Massachusetts |
| 68 | Joseph Hammond | 19 | Son | Clerk | Massachusetts |
| 69 | Warren Hammond | 16 | Son | — | Massachusetts |
| 70 | Robert Hammond THIS PERSON | 15 | Son | — | Massachusetts |
| 71 | Leo Hammond | 13 | Son | — | Massachusetts |
| 72 | Maurice J. Scannell | 46 | Head | Police Officer | Massachusetts |
| 73 | Mary R. Scannell | 44 | Wife | — | Massachusetts |
| 74 | Richard J. Scannell | 20 | Son | — | Massachusetts |
| 75 | Nella M. Scannell | 18 | Daughter | New Worker | Massachusetts |
| 76 | Florence Scannell | 11 | Daughter | — | Massachusetts |
| 77 | Augustus F. Bishop | 70 | Head | — | Vermont |
| 78 | John A. Bishop | 61 | Son | Treasurer | Massachusetts |
| 79 | William T. Mccartan | 60 | Head | Physician | Massachusetts |
| 80 | Helen J. Mccartan | 60 | Wife | — | New York |
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)