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Robert Lucas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Vermilion-County, Illinois
Our Model Tree links this Robert Lucas across the 1930 and 1940 US Censuses in Vermilion-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 8-person household.
Age 25
b. ~1915
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Vermilion-County, Illinois |
| Surname | Lucas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Danville J & C |
| 1935 Residence (County) | Vermilion |
| Additional Details | |
| Occupation | Salesman |
| Industry | Retail Store |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 832 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Salesman |
| Township / Ward | Danville J C |
| Est. Birth Year | ~1915 |
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 Lucas | Son | — | 25 | ~1915 |
| Fred Lucas | Head | — | 48 | ~1892 |
| Sara Fraley | Other | — | 69 | ~1871 |
| Fred Lucas | Son | — | 9 | ~1931 |
| Charles Lucas | Son | — | 11 | ~1929 |
| Dale Lucas | Son | — | 23 | ~1917 |
| Ethel Lucas | Spouse | — | 48 | ~1892 |
| Ellen Lucas | Daughter | — | 7 | ~1933 |
Census Appearances
1930
Vermilion, Illinois
Son, age 15
Vermilion, Illinois · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Vermilion-County, Illinois
Son, age 25
Vermilion-County, Illinois · implied b. ~1915 — 8 household members
| Surname | Lucas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Danville J & C |
| 1935 Residence (County) | Vermilion |
| Occupation | Salesman |
| Industry | Retail Store |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 832 |
| Highest Grade | Hs 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 Lucas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Lucas
Son · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Charles Lucas
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen Lucas
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Lucas
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dale Lucas
Sibling · 1940 · age 23
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 — Vermilion-County, Illinois
Open full size
1940 US Federal Census — Vermilion-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00897-00206)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George Thomas | 40 | Head | Foreman | Illinois |
| 42 | Hester Thomas | 37 | Wife | — | Illinois |
| 43 | Jack M Thomas | 18 | Son | Carrier | Illinois |
| 44 | George Jr Thomas | 16 | Son | Carrier | Illinois |
| 45 | Peter Ab Jerome | 47 | Head | Machine Operator | Poland |
| 46 | Christina Jerome | 46 | Wife | — | Poland |
| 47 | Walter Jerome | 18 | Son | Machine Operator | Illinois |
| 48 | Cecil Matrous | 25 | Son-in-law | Shoe Maker | Michigan |
| 49 | Helen Matrous | 23 | Daughter | Machine Operator | Illinois |
| 50 | Marjorie Matrous | 1 | Granddaughter | — | Illinois |
| 51 | Connie Matrous | 0 | Granddaughter | — | Illinois |
| 52 | Charles Price | 25 | Head | Shoe Maker | Illinois |
| 53 | Constance Price | 20 | Wife | Machine Operator | Illinois |
| 54 | Ross Brewer | 19 | Head | — | Indiana |
| 55 | Loma Brewer | 16 | Son | — | Illinois |
| 56 | Hazel Brewer | 43 | Sister-in-law | Machine Operator | Kentucky |
| 57 | August Heck | 65 | Head | Watchman | Illinois |
| 58 | Emma Heck | 61 | Wife | — | Germany |
| 59 | Gertrude Heck | 35 | Daughter | Typist Clerk | Illinois |
| 60 | Gertrude Ab Dietry | 43 | Daughter | Deputy | Illinois |
| 61 | Theresia Dietry | 63 | Mother | — | Germany |
| 62 | Clementine Dietry | 28 | Sister | Stenographer | Illinois |
| 63 | Clara B Dietry | 26 | Sister | Stenographer | Illinois |
| 64 | Fred Lucas | 48 | Head | Foreman | Illinois |
| 65 | Ethel Lucas | 48 | Wife | — | Illinois |
| 66 | Robert Lucas THIS PERSON | 25 | Son | Salesman | Illinois |
| 67 | Dale Lucas | 23 | Son | Bartender | Illinois |
| 68 | Charles Lucas | 11 | Son | — | Illinois |
| 69 | Fred, Jr Lucas | 9 | Son | — | Illinois |
| 70 | Ellen Jane Lucas | 7 | Daughter | — | Illinois |
| 71 | Sara Fraley | 69 | Lodger | — | Indiana |
| 72 | Harry Allison | 46 | Head | Auto Mechanic | Indiana |
| 73 | Cornelia Allison | 36 | Wife | — | Indiana |
| 74 | Willard Allison | 12 | Son | — | Illinois |
| 75 | Elmer Heidrick | 78 | Head | — | Indiana |
| 76 | Dora Heidrick | 69 | Wife | — | Indiana |
| 77 | Arthur Heidrick | 30 | Son | Cutter | Indiana |
| 78 | Arthur L Miller | 49 | Head | Night Watchman | Indiana |
| 79 | Mamie Miller | 35 | Wife | — | Illinois |
| 80 | John Golden | 10 | Step-son | — | 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)