RH
Robert Hayes — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Illinois
Our Model Tree links this Robert Hayes across the 1920, 1930 and 1940 US Censuses in Lake-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 3-person household.
Age 59
b. ~1881
Male
Head
Born: Maine
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Illinois |
| Surname | Hayes |
| Given Name | Robert H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Warren Twp. |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | Physician |
| Industry | Private Profession |
| Class of Worker | OA |
| Hours Worked | 0 |
| Income (1939) | 1329 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Occupation | Physician |
| Township / Ward | Warren Twp |
| Est. Birth Year | ~1881 |
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 |
|---|---|---|---|---|
| Jane Hayes | Daughter | — | 30 | ~1910 |
| Robert Hayes | Head | — | 59 | ~1881 |
| Gertrude Hayes | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Cook, Illinois
Head, age 39
Cook, Illinois · implied b. ~1881 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maine |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Occupation | Physician |
| Industry | Medical |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Cook, Illinois
Head, age 48
Cook, Illinois · implied b. ~1882 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 26 |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Occupation | Physician |
| Industry | own business |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 90 |
| Radio Set | R |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Lake-County, Illinois
Head, age 59
Lake-County, Illinois · implied b. ~1881 — 3 household members
| Surname | Hayes |
| Given Name | Robert H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Warren Twp. |
| 1935 Residence (County) | Lake |
| Occupation | Physician |
| Industry | Private Profession |
| Class of Worker | OA |
| Hours Worked | 0 |
| Income (1939) | 1329 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Hayes across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Hayes
Head · 1940 · age 59 · b. ~1881 · Illinois
★ 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 — Lake-County, Illinois
Open full size
1940 US Federal Census — Lake-County, Illinois
Page Contents
23 people indexed on this census page (nara:1940:m-t0627-00830-00458)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter Holmes | 34 | Head | Classified Clerk | Michigan |
| 2 | Helmi Holmes | 27 | Wife | Domestic | Michigan |
| 3 | Darlene Holmes | 9 | Daughter | — | Illinois |
| 4 | Peter D. Dinsmore | 72 | Head | Carpenter | Michigan |
| 5 | Mary D. Dinsmore | 65 | Wife | Housework | Illinois |
| 6 | Anna L. Sears | 71 | Head | Housework | Minnesota |
| 7 | Richard W. Sears | 42 | Son | — | Illinois |
| 8 | Meta Schumacher | 50 | Servant | Domestic | Michigan |
| 9 | James Hall | 33 | Servant | Houseman | Illinois |
| 10 | Effie Hall | 35 | Servant | Maid | Alabama |
| 11 | Frank De Mille | 32 | Head | Truck Driver | Illinois |
| 12 | Grace De Mille | 36 | Wife | Saleslady | Illinois |
| 13 | William Lang | 12 | Step-son | — | Illinois |
| 14 | William Unger | 30 | Boarder | Salesman | Indiana |
| 15 | Maude Raibe | 57 | Head | — | Ohio |
| 16 | Harold Raibe | 36 | Son | Attorney | Ohio |
| 17 | Flossie Jane Grams | 45 | Head | Bookkeeper | Ohio |
| 18 | John A. Swanson | 66 | Head | — | Illinois |
| 19 | Cecile W. Swanson | 66 | Wife | — | Wisconsin |
| 20 | William Warner | 19 | Head | Dishwasher | Illinois |
| 21 | Robert H. Hayes THIS PERSON | 59 | Head | Physician | Maine |
| 22 | Gertrude Hayes | 55 | Wife | — | Maine |
| 23 | Jane Hayes | 30 | Daughter | Stenographer | 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)