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Helen Hamilton — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Helen Hamilton across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 11-person household.
Age 11
b. ~1929
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Hamilton |
| Given Name | Helen A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Medford City |
| Est. Birth Year | ~1929 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Foster | Daughter | — | 22 | ~1918 |
| Alice Foster | Daughter | — | 25 | ~1915 |
| Justina Hamilton | Daughter | — | 7 | ~1933 |
| Helen Hamilton | Daughter | — | 36 | ~1904 |
| Agnes Foster | Head | — | 52 | ~1888 |
| William Hamilton | Son | — | 4 | ~1936 |
| Thomas Foster | Son | — | 26 | ~1914 |
| James Foster | Son | — | 38 | ~1902 |
| Lillian Foster | Daughter | — | 20 | ~1920 |
| George Hamilton | Son | — | 9 | ~1931 |
| Helen Hamilton | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Middlesex, Massachusetts
Other, age 1
Middlesex, Massachusetts · implied b. ~1929 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Helen M |
| Relationship to Head | Granddaughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Maine |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 11
Middlesex-County, Massachusetts · implied b. ~1929 — 11 household members
| Surname | Hamilton |
| Given Name | Helen A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Highest Grade | No 5 |
| 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 Helen Hamilton across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Helen Hamilton
Daughter · 1940 · age 11 · b. ~1929 · Massachusetts
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Sibling
James Foster
Sibling · 1940 · age 38
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Foster
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Foster
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Justina Hamilton
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Hamilton
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Foster
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Hamilton
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Hamilton
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Foster
Sibling · 1940 · age 22
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-t0627-01612-00688)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Doran | 3 | Son | — | Massachusetts |
| 2 | John J. Donnellon | 56 | Head | Salesman | Massachusetts |
| 3 | Mildred Donnellon | 28 | Daughter | Teacher | Massachusetts |
| 4 | John B. Donnellon | 24 | Son | Teacher | Massachusetts |
| 5 | John E. Milano | 43 | Head | Fireman | Massachusetts |
| 6 | Helen L. Milano | 43 | Wife | — | Massachusetts |
| 7 | William G. Milano | 25 | Son | — | Massachusetts |
| 8 | John E. Jr. Milano | 19 | Son | Printer | Massachusetts |
| 9 | Helen V. Milano | 8 | Daughter | — | Massachusetts |
| 10 | Beverly A. Milano | 6 | Daughter | — | Massachusetts |
| 11 | Ambie E. Morgan | 66 | Head | — | Canada-English |
| 12 | Constance H. Morgan | 31 | Daughter | Secretary | Massachusetts |
| 13 | Ruth E. Morgan | 28 | Daughter | Stenographer | Massachusetts |
| 14 | Fred A. Falt | 72 | Head | — | Massachusetts |
| 15 | Kate L. Falt | 71 | Wife | — | Canada-English |
| 16 | Norman Falt | 34 | Son | Lithograph Artist | Massachusetts |
| 17 | Agnes Foster | 52 | Head | — | Maine |
| 18 | James W. Foster | 38 | Son | Body Maker | Massachusetts |
| 19 | Thomas Foster | 26 | Son | Installation Man | Massachusetts |
| 20 | Alice G. Foster | 25 | Daughter | Machine Operator | Massachusetts |
| 21 | Dorothy Foster | 22 | Daughter | Machine Operator | Massachusetts |
| 22 | Lillian Foster | 20 | Daughter | Saleslady | Massachusetts |
| 23 | Enos | None | — | — | — |
| 24 | Helen E. Hamilton | 36 | Daughter | — | Massachusetts |
| 25 | Helen A. Hamilton THIS PERSON | 11 | Daughter | — | Massachusetts |
| 26 | George Hamilton | 9 | Son | — | Massachusetts |
| 27 | Justina Hamilton | 7 | Daughter | — | Massachusetts |
| 28 | William J. Hamilton | 4 | Son | — | Massachusetts |
| 29 | Louis Hoeppner | 43 | Head | Billing Man | New York |
| 30 | Ruth Hoeppner | 46 | Wife | — | Massachusetts |
| 31 | Nelson Hoeppner | 13 | Son | — | Massachusetts |
| 32 | Howard Small | 89 | Father-in-law | — | Massachusetts |
| 33 | Abbie Small | 83 | Mother-in-law | — | Massachusetts |
| 34 | Mccready Emmett | 40 | Head | Salesman | Massachusetts |
| 35 | Kathryn Emmett | 40 | Wife | — | Massachusetts |
| 36 | Emmett Jr. Emmett | 17 | Son | — | Massachusetts |
| 37 | Ann Emmett | 14 | Daughter | — | Massachusetts |
| 38 | Margaret Emmett | 10 | Daughter | — | Massachusetts |
| 39 | Sebastiano Correia | 42 | Head | Baker | Italy |
| 40 | Maria Correia | 42 | Wife | — | Italy |
Related Census Records
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)