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Robert Robertson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Grundy-County, Illinois
Our Model Tree links this Robert Robertson across the 1930 and 1940 US Censuses in Grundy-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 8-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Grundy-County, Illinois |
| Surname | Robertson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Coal City |
| 1935 Residence (County) | Grundy |
| Additional Details | |
| Occupation | Color Helper |
| Industry | Atlas Paper Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Color Helper |
| Township / Ward | Coal City |
| Est. Birth Year | ~1918 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Robertson | Other | — | 3 | ~1937 |
| Hazel Robertson | Daughter | — | 28 | ~1912 |
| Lebert Robertson | Daughter | — | 21 | ~1919 |
| Janet Robertson | Daughter | — | 30 | ~1910 |
| Ruth Robertson | Daughter | — | 25 | ~1915 |
| Mae Robertson | Daughter | — | 32 | ~1908 |
| Isabell Robertson | Head | — | 55 | ~1885 |
| Robert Robertson | Son | — | 22 | ~1918 |
Census Appearances
1930
Grundy, Illinois
Son, age 12
Grundy, Illinois · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robertson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Grundy-County, Illinois
Son, age 22
Grundy-County, Illinois · implied b. ~1918 — 8 household members
| Surname | Robertson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Coal City |
| 1935 Residence (County) | Grundy |
| Occupation | Color Helper |
| Industry | Atlas Paper Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Mae Robertson
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lebert Robertson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hazel Robertson
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Robertson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Janet Robertson
Sibling · 1940 · age 30
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 — Grundy-County, Illinois
Open full size
1940 US Federal Census — Grundy-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00809-00055)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Banuchi Ulivi | 34 | Head | Dealer | Italy |
| 2 | Irene Ulivi | 31 | Wife | Saleslady | Illinois |
| 3 | Donald Ulivi | 9 | Son | — | Illinois |
| 4 | Delores Ulivi | 5 | Daughter | — | Illinois |
| 5 | Nicholas Earthly | 29 | Head | Salesman | Indiana |
| 6 | Mary Anne Earthly | 30 | Wife | Hand Sewer | Illinois |
| 7 | Jessie Boggio | 39 | Head | — | Illinois |
| 8 | Charles Boggio | 18 | Son | Clerk | Illinois |
| 9 | John Boggio | 10 | Son | — | Illinois |
| 10 | Isabell Robertson | 55 | Head | — | Illinois |
| 11 | Mae Isabell Robertson | 32 | Daughter | Mach. Operator | Illinois |
| 12 | Janet Robertson | 30 | Daughter | Mach. Operator | Illinois |
| 13 | Hazel Robertson | 28 | Daughter | Mach. Operator | Illinois |
| 14 | Ruth Robertson | 25 | Daughter | Saleslady | Illinois |
| 15 | Robert Robertson THIS PERSON | 22 | Son | Color Helper | Illinois |
| 16 | Lebert Robertson | 21 | Daughter | — | Illinois |
| 17 | Robert Jr. Robertson | 3 | Grandson | — | Illinois |
| 18 | Howard Cairns | 32 | Head | Oiler | Illinois |
| 19 | Lucille Cairns | 31 | Wife | Secretary | Illinois |
| 20 | Dominic Bertot | 51 | Head | Section Worker | Illinois |
| 21 | Elizabeth Bertot | 40 | Wife | — | Illinois |
| 22 | Michael Cairns | 58 | Head | Ground Man | Scotland |
| 23 | Mary Cairns | 57 | Wife | — | Germany |
| 24 | William Cairns | 23 | Son | Construction | Illinois |
| 25 | Sealy Mill | 59 | Head | Operating Switches | Illinois |
| 26 | Anne Mill | 54 | Wife | — | Illinois |
| 27 | Melvin Mill | 14 | Son | — | Illinois |
| 28 | Gordon Gilmour | 37 | Head | Engineer | Illinois |
| 29 | Lillian Gilmour | 35 | Wife | — | Illinois |
| 30 | Mary Celestine Sister | 52 | Head | Teaching | Iowa |
| 31 | Mary Beatrice Sister | 60 | Member | Housekeeper | Mass. |
| 32 | Mary Daniel Sister | 56 | Head | Teaching | Iowa |
| 33 | Leslie Momsen | 31 | Head | Barber | Kansas |
| 34 | Ruth Momsen | 29 | Wife | Clerk | Illinois |
| 35 | Charles Valerio | 67 | Head | Justice Peace | Italy |
| 36 | Theresa Valerio | 61 | Wife | — | Italy |
| 37 | William Valerio | 31 | Son | Attendant | Illinois |
| 38 | Joseph Giganetti | 28 | Son | Printer | Illinois |
| 39 | Henry Lyons | 48 | Head | Mechanic | Illinois |
| 40 | Minnie Lyons | 45 | Wife | — | Illinois |
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)