JA
John Alexander — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this John Alexander across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a head (b.~1895), then head of a 5-person household.
Age 35
b. ~1895
Male
Head
Born: Greece
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Alexander |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Greece |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Age at First Marriage | 25 |
| Father's Birthplace | Greece |
| Mother's Birthplace | Greece |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Restaurant |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | Greek |
| Home Owned/Rented | R |
| Home Value / Rent | 75.00 |
| Radio Set | R |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
| Occupation | Proprietor |
| Township / Ward | Berwyn Illinois City |
| Est. Birth Year | ~1895 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Alexander | Head | — | 35 | ~1895 |
| Angelo Kotsopoulos | Other | — | 33 | ~1897 |
| George Alexander | Son | — | 6 | ~1924 |
| Nisto Alexander | Son | — | 3 | ~1927 |
| Pauline Alexander | Spouse | — | 26 | ~1904 |
Census Appearances
1920
Los Angeles, …
Other, age 24
Los Angeles, California · implied b. ~1896 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | John |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Greece |
| Year of Immigration | 1911 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Greece |
| Mother's Birthplace | Greece |
| Occupation | Truck Driver |
| Industry | Pullman Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Greek |
| Birth Country | Greece |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | greece |
1930
Cook, Illinois
Head, age 35
Cook, Illinois · implied b. ~1895 — 5 household members
| Surname | Alexander |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Greece |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Age at First Marriage | 25 |
| Father's Birthplace | Greece |
| Mother's Birthplace | Greece |
| Occupation | Proprietor |
| Industry | Restaurant |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | Greek |
| Home Owned/Rented | R |
| Home Value / Rent | 75.00 |
| Radio Set | R |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
1940
Cook-County, Illinois
Head, age 45
Cook-County, Illinois · implied b. ~1895 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexandrou |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Greece |
| 1935 Residence (City) | Berwyn City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Proprietor |
| Industry | Restaurant |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 714 |
| Highest Grade | No H 4 |
| 1935 Residence | Same place |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
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 John Alexander across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
John Alexander
Head · 1930 · age 35 · b. ~1895 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel414:0238)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jesse Genge | 55 | Head | Tool Maker | Indiana |
| 2 | Florence M. Genge | 41 | Wife | — | Indiana |
| 3 | John H. Kenny | 25 | Head | Clerk | Maryland |
| 4 | Anne Kenny | 24 | Wife | — | Illinois |
| 5 | Joseph A. Nozak | 43 | Head | Metalsman | Illinois |
| 6 | Rose J. Nozak | 29 | Wife | — | Illinois |
| 7 | Margaret Nozak | 9 | Daughter | School | Illinois |
| 8 | Robert L. Baird | 33 | Head | Salesman | Illinois |
| 9 | Helen Baird | 29 | Wife | — | Illinois |
| 10 | Robert L. Baird | 1 | Son | — | Illinois |
| 11 | Eugene A. Boivin | 31 | Head | Clerk | Illinois |
| 12 | Janette Boivin | 26 | Wife | — | Poland |
| 13 | Eugene Jr. Boivin | 2 | Son | — | Illinois |
| 14 | Edward Kowalska | 28 | Head | Draftsman | Illinois |
| 15 | Madeline Kowalska | 27 | Wife | — | Illinois |
| 16 | John Pustik | 61 | Head | Machinist | Czechoslovakia |
| 17 | Mary Pustik | 58 | Wife | — | Illinois |
| 18 | Mae Vaughan | 35 | Daughter | Stenograph | Illinois |
| 19 | Emmett Michaels | 31 | Head | Surface Man | Michigan |
| 20 | Jeanette Michaels | 28 | Wife | — | Illinois |
| 21 | Emmett Jr. Michaels | 4 | Son | — | Michigan |
| 22 | Anton Canda | 50 | Head | Tailor | Czechoslovakia |
| 23 | Mary Canda | 52 | Wife | — | Czechoslovakia |
| 24 | George Green | 54 | Head | Receiving Ship. | Kentucky |
| 25 | Emma Green | 52 | Wife | — | Illinois |
| 26 | John Alexander THIS PERSON | 35 | Head | Proprietor | Greece |
| 27 | Pauline Alexander | 26 | Wife | — | Greece |
| 28 | George Alexander | 6 | Son | School | Illinois |
| 29 | Nisto Alexander | 3 | Son | — | Illinois |
| 30 | Angelo Kotsopoulos | 33 | Brother | Proprietor | Greece |
| 31 | Alfred Winter | 39 | Head | Fireman | Illinois |
| 32 | Laura Winter | 39 | Wife | Stenograph | Illinois |
| 33 | Mary Winter | 11 | Daughter | School | Illinois |
| 34 | Walter Krupa | 48 | Head | Machinist | Illinois |
| 35 | Mary Krupa | 35 | Wife | — | Illinois |
| 36 | Helen Krupa | 15 | Daughter | School | Illinois |
| 37 | Charles Barr | 33 | Head | Repair Man | Illinois |
| 38 | Lillian Barr | 37 | Wife | — | Illinois |
| 39 | Charles Jr. Barr | 1 | Son | — | Illinois |
| 40 | John Mattas | 39 | Brother | Retired | Illinois |
| 41 | George C. Smidl | 38 | Head | Office Manager | Illinois |
| 42 | Theresa Smidl | 35 | Wife | — | Illinois |
| 43 | Irene Smidl | 12 | Daughter | School | Illinois |
| 44 | Prokop J. Smidl | 64 | Head | Retired | Czechoslovakia |
| 45 | Anna M. Smidl | 58 | Wife | — | Czechoslovakia |
| 46 | Ella Smidl | 37 | Daughter | Bookkeeper | Illinois |
| 47 | Robert Helsing | 44 | Head | Engineer | Illinois |
| 48 | Minnie Helsing | 58 | Wife | — | Illinois |
| 49 | Elmer Helsing | 25 | Son | Rate Clerk | Illinois |
| 50 | Herbert Helsing | 19 | Son | Office Work | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)