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Robert Hamilton — 1940 US Census Record
Model Tree available1940 United States Federal Census · Montgomery-County, Ohio
Our Model Tree links this Robert Hamilton across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Ohio (XGBoost, ~Confirmed), with identified parents Carl & Mary — first a head (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Ohio |
| Surname | Hamilton |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Order clerk |
| Industry | Frigidaire |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1520 |
| Highest Grade | H 4 30 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Order Clerk |
| Township / Ward | Dayton City |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Hamilton | Head | — | 29 | ~1911 |
| Thomas Hamilton | Son | — | 1 | ~1939 |
| Alma Hamilton | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Montgomery, Ohio
Son, age 9
Montgomery, Ohio · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Montgomery, Ohio
Son, age 19
Montgomery, Ohio · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Clerk |
| Industry | Elec Refrigerators |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Montgomery-County, Ohio
Head, age 29
Montgomery-County, Ohio · implied b. ~1911 — 3 household members
| Surname | Hamilton |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Dayton City |
| 1935 Residence (County) | Montgomery |
| Occupation | Order clerk |
| Industry | Frigidaire |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1520 |
| Highest Grade | H 4 30 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Hamilton across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Carl Hamilton (~0.92 confidence) and mother Mary Hamilton (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Carl Hamilton
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Mary Hamilton
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Hamilton
Head · 1940 · age 29 · b. ~1911 · Ohio
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Montgomery-County, Ohio
Open full size
1940 US Federal Census — Montgomery-County, Ohio
Page Contents
26 people indexed on this census page (nara:1940:m-t0627-03255-00323)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patricia Lee Ihos | Thos | 11 | Daughter | — | Ohio |
| 2 | Betty Jean Ihos | Thos | 10 | Daughter | — | Ohio |
| 3 | Wm. J. Tusculum | Trusculum | 49 | Head | Wool Maker | Ohio |
| 4 | Mabel Tusculum | Trusculum | 49 | Wife | Teller | Ohio |
| 5 | Lottie Hughes | 67 | Mother-in-law | — | Indiana |
| 6 | Ralph Willstatter | Willstaetter | 37 | Head | Final Inspector | Ohio |
| 7 | Lillian Willstatter | Willstaetter | 37 | Wife | — | Ohio |
| 8 | Elaine Willstatter | Willstaetter | 8 | Daughter | — | Ohio |
| 9 | Elinore Willstatter | Willstaetter | 1 | Daughter | — | Ohio |
| 10 | Carl Weish | Welsh | 36 | Head | Inspector | Indiana |
| 11 | Agnes Weish | Welsh | 36 | Wife | — | Ohio |
| 12 | Thomas Weish | Welsh | 3 | Son | — | Ohio |
| 13 | Frank Tifner | Tyfner | 31 | Head | Production Inspector | Indiana |
| 14 | Mildred Tifner | Tyfner | 37 | Wife | — | Indiana |
| 15 | Patricia Tifner | Tyfner | 5 | Daughter | — | Ohio |
| 16 | Nancy Tifner | Tyfner | 3 | Daughter | — | Ohio |
| 17 | Linda Tifner | Tyfner | 2 | Daughter | — | Ohio |
| 18 | Robert Hamilton THIS PERSON | 29 | Head | Order Clerk | Ohio |
| 19 | Alma Hamilton | 29 | Wife | — | Ohio |
| 20 | Thomas Hamilton | 1 | Son | — | Ohio |
| 21 | Michael Garcia | 37 | Head | Fruit Salesman | Wisconsin |
| 22 | Margaret Garcia | 35 | Wife | — | Pennsylvania |
| 23 | Joseph Garcia | 10 | Son | — | Ohio |
| 24 | Harry D. Johnson | 39 | Head | Fire-Fighter | Tennessee |
| 25 | Adella Johnson | 35 | Wife | Metal Filer | Virginia |
| 26 | Harlan Johnson | 15 | Daughter | — | California |
Pedigree Summary
Robert
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)