RH
Robert Hamilton — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Robert Hamilton across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Rose & Peter — first a son (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Hamilton |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1916 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Lucille Hamilton | Daughter | — | 29 | ~1911 |
| Peter Hamilton | Head | — | 62 | ~1878 |
| Robert Hamilton | Son | — | 24 | ~1916 |
| Rose Hamilton | Spouse | — | 63 | ~1877 |
Census Appearances
1920
Marion, Indiana
Son, age 4
Marion, Indiana · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Robert Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 14
Marion, Indiana · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Son, age 24
Marion-County, Indiana · implied b. ~1916 — 4 household members
| Surname | Hamilton |
| Given Name | Robert L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Class of Worker | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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: mother Rose Hamilton (~0.92 confidence) and father Peter Hamilton (~0.92 confidence) and father Robert Hamilton (~0.92 confidence) and mother Irene Hamilton (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Rose Hamilton
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
Peter Hamilton
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Robert Hamilton
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Irene Hamilton
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Hamilton
Son · 1940 · age 24 · b. ~1916 · Indiana
★ You are viewing this record
Sibling
Lucille Hamilton
Sibling · 1940 · age 29
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01127-00444)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Peter M. Hamilton | 62 | Head | — | Indiana |
| 42 | Rose M. Hamilton | 63 | Wife | — | Indiana |
| 43 | Lucille Hamilton | 29 | Daughter | — | Indiana |
| 44 | Robert L. Hamilton THIS PERSON | 24 | Son | — | Indiana |
| 45 | Clarence Ball | 47 | Head | Private Clerk | Illinois |
| 46 | Margaret Ball | 37 | Wife | — | Illinois |
| 47 | Charles B. Harding | 62 | Head | — | Indiana |
| 48 | Rose Harding | 77 | Wife | — | Indiana |
| 49 | Charles E. Dunbar | 63 | Head | Train Inspector | Indiana |
| 50 | Della D. Dunbar | 53 | Wife | — | Indiana |
| 51 | Paul Dunbar | 28 | Son | — | Indiana |
| 52 | Charles Fiseman | 51 | Head | Mill Man | Indiana |
| 53 | Mary E. Fiseman | 54 | Wife | — | Indiana |
| 54 | Walter P. Fiseman | 22 | Son | Asst. Library | Indiana |
| 55 | Dewey Fiseman | 19 | Son | Asst. Library | Indiana |
| 56 | Della Fiseman | 16 | Daughter | — | Indiana |
| 57 | Fred Fiseman | 12 | Son | — | Indiana |
| 58 | Lyda Fiseman | 21 | Daughter | — | Indiana |
| 59 | Richard Pate | 2 | Nephew | — | Indiana |
| 60 | Clara D. Mcneill | 65 | Head | — | Indiana |
| 61 | Lloyd White | 15 | Boarder | — | Indiana |
| 62 | Dallie Dorsey | 34 | Lodger | — | Indiana |
| 63 | Ruben Jones | 23 | Lodger | — | Indiana |
| 64 | Edna Jones | 24 | Lodger | — | Indiana |
| 65 | Richard Broucher | 27 | Head | Automobile Mechanic | Indiana |
| 66 | Golden Broucher | 23 | Wife | — | Missouri |
| 67 | George Broucher | 69 | Father | — | Indiana |
| 68 | William Linder | 41 | Head | Janitor | Kentucky |
| 69 | Lara B. Linder | 41 | Wife | — | Kentucky |
| 70 | Lewis H. Linder | 19 | Son | Laborer | Kentucky |
| 71 | Violet Linder | 17 | Daughter | — | Kentucky |
| 72 | Ruby Linder | 14 | Daughter | — | Indiana |
| 73 | Freda Linder | 11 | Daughter | — | Indiana |
| 74 | Kenneth Jelly | 24 | Son-in-law | — | Indiana |
| 75 | Margaret Jelly | 21 | Daughter | — | Kentucky |
| 76 | Clarence Mcneill | 46 | Head | — | Indiana |
| 77 | Elizabeth Mcneill | 45 | Wife | — | Kentucky |
| 78 | Richard Mcneill | 21 | Son | N. Y. A. | Indiana |
| 79 | Betty Jane Mcneill | 17 | Daughter | — | Indiana |
| 80 | Lucille Mcneill | 10 | Daughter | — | Indiana |
Pedigree Summary
Robert + 1 sibling
Gen 1 · 4 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)