RR
Robert Robertson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hardin-County, Iowa
Our Model Tree links this Robert Robertson across the 1930 and 1940 US Censuses in Hardin-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hardin-County, Iowa |
| Surname | Robertson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jackson Township |
| 1935 Residence (County) | Hardin |
| Additional Details | |
| Hours Worked | 6 |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Jackson Township |
| Est. Birth Year | ~1926 |
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 |
|---|---|---|---|---|
| Dorothy Robertson | Daughter | — | 11 | ~1929 |
| E Robertson | Head | — | 38 | ~1902 |
| James Robertson | Son | — | 9 | ~1931 |
| Robert Robertson | Son | — | 14 | ~1926 |
| William Robertson | Son | — | 16 | ~1924 |
| Bessie Peirce | Other | — | 61 | ~1879 |
| Alta Robertson | Spouse | — | 35 | ~1905 |
Census Appearances
1930
Hardin, Iowa
Son, age 4
Hardin, Iowa · implied b. ~1926 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Hardin-County, Iowa
Son, age 14
Hardin-County, Iowa · implied b. ~1926 — 7 household members
| Surname | Robertson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Jackson Township |
| 1935 Residence (County) | Hardin |
| Hours Worked | 6 |
| Highest Grade | G 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Robertson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Robertson
Son · 1940 · age 14 · b. ~1926 · Iowa
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Sibling
James Robertson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Robertson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Robertson
Sibling · 1940 · age 11
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 — Hardin-County, Iowa
Open full size
1940 US Federal Census — Hardin-County, Iowa
Page Contents
22 people indexed on this census page (nara:1940:m-t0627-01165-00487)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | C. M. Ellison | 64 | Head | Farmer | Missouri |
| 2 | Minnie Ellison | 57 | Wife | Housewife | Iowa |
| 3 | E. V. Robertson | 38 | Head | Farmer | Iowa |
| 4 | Alta May Robertson | 35 | Wife | Housewife | Iowa |
| 5 | William Robertson | 16 | Son | — | Iowa |
| 6 | Robert Robertson THIS PERSON | 14 | Son | — | Iowa |
| 7 | James Robertson | 9 | Son | — | Iowa |
| 8 | Dorothy Robertson | 11 | Daughter | — | Iowa |
| 9 | Bessie X Peirce | 61 | Mother in law | — | Iowa |
| 10 | C. M. Meyers | 43 | Head | Farmer | Iowa |
| 11 | May Meyers | 42 | Wife | Housewife | Iowa |
| 12 | Ella Jen Meyers | 17 | Daughter | — | Iowa |
| 13 | William Meyers | 15 | Son | — | Iowa |
| 14 | John Meyers | 13 | Son | — | Iowa |
| 15 | Andrew Bachman | 63 | Head | Farmer | Missouri |
| 16 | Lillie X Bachman | 55 | Wife | Housewife | Missouri |
| 17 | Basil Bachman | 40 | Head | Farmer | Missouri |
| 18 | Ester X Bachman | 34 | Wife | Housewife | Missouri |
| 19 | Adren Bachman | 14 | Son | — | Missouri |
| 20 | Ruth V. Bachman | 11 | Daughter | — | Missouri |
| 21 | Clint H. Cochran | 70 | Head | Farmer Retired | Iowa |
| 22 | Fred Cochran | 42 | Son | Laborer For Father | Iowa |
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)