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Robert Lambert — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Lambert across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Richard & Stella — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Lambert |
| Given Name | Robert A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Argo |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | C-3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Argo |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Frank Lambert | Son | — | 21 | ~1919 |
| Mary Lambert | Other | — | 78 | ~1862 |
| Robert Lambert | Son | — | 22 | ~1918 |
| Virginia Kolineki | Other | — | 24 | ~1916 |
| Stella Lambert | Spouse | — | 52 | ~1888 |
| Richard Lambert | Head | — | 61 | ~1879 |
Census Appearances
1920
Cook, Illinois
Son, age 2
Cook, Illinois · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lambert |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lambert |
| Given Name | Robert H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| 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
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 6 household members
| Surname | Lambert |
| Given Name | Robert A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Argo |
| 1935 Residence (County) | Cook |
| Highest Grade | C-3 |
| 1935 Residence | Same place |
| 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 Lambert across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Richard Lambert (~0.92 confidence) and mother Stella Lambert (~0.92 confidence) and mother Stella Lambert (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Richard Lambert
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Stella Lambert
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Stella Lambert
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Lambert
Son · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Frank Lambert
Sibling · 1940 · age 21
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00782-00454)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Joe Krall | 35 | Lodger | Machine Operator | Pennsylvania |
| 42 | Lola Pane | 23 | Lodger | High School Teacher | Illinois |
| 43 | Charles Strempke | 28 | Head | Butcher | Illinois |
| 44 | Amelia Strempke | 28 | Wife | — | Indiana |
| 45 | Charlene Strempke | 1 | Daughter | — | Illinois |
| 46 | Susie Lutz | 30 | Boarder | — | Indiana |
| 47 | Richard Lambert | 61 | Head | Proprietor | Illinois |
| 48 | Stella Lambert | 52 | Wife | — | Illinois |
| 49 | Robert A. Lambert THIS PERSON | 22 | Son | — | Illinois |
| 50 | Frank Lambert | 21 | Son | Proprietor | Illinois |
| 51 | Mary Lambert | 78 | Mother | — | Illinois |
| 52 | Virginia Kolineki | 24 | Maid | Housekeeper | Illinois |
| 53 | Charles Benesov | 45 | Head | Cashier | Illinois |
| 54 | Theresa Benesov | 40 | Wife | — | Illinois |
| 55 | Harold Benesov | 20 | Son | — | Illinois |
| 56 | Lawrence Benesov | 8 | Son | — | Illinois |
| 57 | Leon B. Colatine | 42 | Head | Proprietor Merchant | Lithuania |
| 58 | Anna Colatine | 40 | Wife | Saleswoman | New York |
| 59 | Muriel A. Colatine | 18 | Daughter | — | Illinois |
| 60 | Meryla Colatine | 12 | Daughter | — | Illinois |
| 61 | Robert Colatine | 8 | Son | — | Illinois |
| 62 | Helene Paciaska | 22 | Maid | Housekeeper | Illinois |
| 63 | Roscoe Brown | 39 | Head | Mechanic | Indiana |
| 64 | Elizabeth Brown | 36 | Wife | — | Indiana |
| 65 | Elizabeth Jane Brown | 15 | Daughter | — | Indiana |
| 66 | Joseph Piecarsky | 46 | Head | Publisher | Illinois |
| 67 | Martha Piecarsky | 38 | Wife | — | Illinois |
| 68 | Raymond Piecarsky | 16 | Son | — | Illinois |
| 69 | Ronald Piecarsky | 4 | Son | — | Illinois |
| 70 | Caroline Parson | 74 | Head | — | Denmark |
| 71 | Everett C. Parson | 32 | Son | High School Teacher | Illinois |
| 72 | Peter Pluchko | 46 | Head | Laborer | Poland |
| 73 | Mary Pluchko | 31 | Wife | — | Illinois |
| 74 | Rose Lily Pluchko | 8 | Daughter | — | Illinois |
| 75 | Jane Mary Pluchko | 1 | Daughter | — | Illinois |
| 76 | Luca Caliendo | 47 | Head | Machinist | Italy |
| 77 | Theresa Caliendo | 41 | Wife | — | Italy |
| 78 | John H. Cain | 69 | Head | — | Kentucky |
| 79 | Martha Cain | 55 | Wife | — | Tennessee |
| 80 | Thelma Hawk | 35 | Daughter | Waitress | Colorado |
Pedigree Summary
Robert + 1 sibling
Gen 1 · 3 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)