RA
Robert Alexander — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Alexander across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Clyde & Laura — first a son (b.~1917), then head of a 6-person household.
Age 23
b. ~1917
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Alexander |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Packer |
| Industry | Market Basket Manufactor |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 156 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Packer |
| Township / Ward | Chicago |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| Koneta Alexander | Daughter | — | 19 | ~1921 |
| Clyde Alexander | Head | — | 63 | ~1877 |
| Gweneth Brock | Other | — | 22 | ~1918 |
| Charles Machikunsky | Other | — | 26 | ~1914 |
| Robert Alexander | Son | — | 23 | ~1917 |
| Laura Alexander | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Cook, Illinois
Son, age 3
Cook, Illinois · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 13
Cook, Illinois · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| 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 23
Cook-County, Illinois · implied b. ~1917 — 6 household members
| Surname | Alexander |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Packer |
| Industry | Market Basket Manufactor |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 156 |
| Highest Grade | H 4 |
| 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 Alexander across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Clyde Alexander (~0.92 confidence) and mother Laura Alexander (~0.92 confidence) and mother Florence Alexander (~0.92 confidence) and father S Alexander (~0.92 confidence) and father Robert Alexander (~0.92 confidence) and mother Bernice Alexander (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Clyde Alexander
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Laura Alexander
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Florence Alexander
b. ~1890
Source mother
● Household
· direct · ~0.92
Father
S Alexander
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Robert Alexander
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Bernice Alexander
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Alexander
Son · 1940 · age 23 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
Koneta Alexander
Sibling · 1940 · age 19
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-t0627-00968-00028)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lester Swan | 35 | Head | Fireman | Missouri |
| 2 | Sophia Swan | 33 | Wife | — | Wisconsin |
| 3 | Leslie Swan | 7 | Son | — | Wisconsin |
| 4 | Jennie G. Ellworth | 70 | Head | — | New Hampshire |
| 5 | Gordon R. Newman | 21 | Head | Interior Decorator | Wisconsin |
| 6 | Edna M. Newman | 19 | Wife | — | Michigan |
| 7 | Adeline Newman | 1 | Daughter | — | Illinois |
| 8 | James Kovaloskey | 39 | Head | Musician | Czechoslovakia |
| 9 | Helen Kovaloskey | 37 | Wife | Fur Finisher | Czechoslovakia |
| 10 | Alfred Kovaloskey | 15 | Son | — | Illinois |
| 11 | Robert Kovaloskey | 10 | Son | — | Illinois |
| 12 | Edward Vlava | 40 | Head | Janitor | Czechoslovakia |
| 13 | Bertha Vlava | 40 | Wife | — | Czechoslovakia |
| 14 | Edward J. Vlava | 14 | Son | — | Illinois |
| 15 | Eloise Vlava | 12 | Daughter | — | Illinois |
| 16 | Robert Anderson | 45 | Head | Cook | Sweden |
| 17 | Carl Anderson | 33 | Brother | Cook | Sweden |
| 18 | Walter Trumpp | 31 | Head | Tool & Dye Maker | Germany |
| 19 | Juliana Trumpp | 31 | Wife | — | New Jersey |
| 20 | Walter Trumpp | 7 | Son | — | Illinois |
| 21 | Armand Trumpp | 5 | Son | — | Illinois |
| 22 | Walter Newton | 60 | Head | Locomotive Engineer | England |
| 23 | Walter C. Newton | 22 | Son | New Worker | Illinois |
| 24 | Andrew J. Newton | 19 | Son | — | Illinois |
| 25 | Joseph Kacirek | 47 | Head | Plumber | Illinois |
| 26 | Anna Kacirek | 40 | Wife | — | Illinois |
| 27 | Viola Kacirek | 11 | Daughter | — | Illinois |
| 28 | Clyde Alexander | 63 | Head | Machinist | Michigan |
| 29 | Laura Alexander | 57 | Wife | Cook | Arizona |
| 30 | Robert Alexander THIS PERSON | 23 | Son | Packer | Illinois |
| 31 | Koneta Alexander | 19 | Daughter | — | Ohio |
| 32 | Gweneth Brock | 22 | Neice | Telephone Operator | Michigan |
| 33 | Charles Machikunsky | 26 | Lodger | Scaler | Illinois |
| 34 | Sydney Gorman | 47 | Head | Conductor | Illinois |
| 35 | Catherine Gorman | 31 | Wife | Telephone Operator | Illinois |
| 36 | George Moore | 65 | Head | Engineer | Mass. |
| 37 | Ida Moore | 63 | Wife | — | Illinois |
| 38 | Penelope Schadick | 56 | Sister | Matron | Illinois |
| 39 | Stella Hajek | 37 | Head | — | Czechoslovakia |
| 40 | Stella Hajek | 15 | Daughter | — | Illinois |
Pedigree Summary
Robert + 1 sibling
Gen 1 · 6 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)