JC
John Cummings — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this John Cummings across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 9-person household.
Age 10
b. ~1920
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Cummings |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1920 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Alice Cummings | Daughter | — | 1 | ~1929 |
| Catherine Cummings | Daughter | — | 4 | ~1926 |
| Margaret Cummings | Daughter | — | 12 | ~1918 |
| Fred Cummings | Head | — | 47 | ~1883 |
| John Cummings | Son | — | 10 | ~1920 |
| Fred Cummings | Son | — | 14 | ~1916 |
| Edward Cummings | Son | — | 5 | ~1925 |
| James Cummings | Son | — | 8 | ~1922 |
| Cecelia Cummings | Spouse | — | 31 | ~1899 |
Census Appearances
1930
Cook, Illinois
Son, age 10
Cook, Illinois · implied b. ~1920 — 9 household members
| Surname | Cummings |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 19
Cook-County, Illinois · implied b. ~1921 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cumming |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Glenview |
| 1935 Residence (County) | Cook |
| Industry | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Illinois |
| 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 John Cummings across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Cummings
Son · 1930 · age 10 · b. ~1920 · Illinois
★ You are viewing this record
Sibling
Edward Cummings
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Cummings
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Cummings
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cummings
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Cummings
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Cummings
Sibling · 1930 · age 12
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
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:illinoiscensus00reel437:0264)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Salvatore D'Amico | 32 | Head | — | Italy |
| 2 | Nellie D'Amico | 32 | Wife | — | Illinois |
| 3 | Salvatore D'Amico | 12 | Son | — | Illinois |
| 4 | Mildred D'Amico | 10 | Daughter | — | Illinois |
| 5 | Genevieve D'Amico | 8 | Daughter | — | Illinois |
| 6 | Emily D'Amico | 6 | Daughter | — | Illinois |
| 7 | Frank Szymski | 37 | Head | Teamster | Poland |
| 8 | Frances Szymski | 33 | Wife | — | Poland |
| 9 | Frank Szymski | 14 | Son | — | Illinois |
| 10 | Theresa Szymski | 12 | Daughter | — | Illinois |
| 11 | Edward Szymski | 10 | Son | — | Illinois |
| 12 | Fred Cummings | 47 | Head | Carpenter | Illinois |
| 13 | Cecelia Cummings | 31 | Wife | — | Ireland |
| 14 | Fred Jr. Cummings | 14 | Son | — | Illinois |
| 15 | Margaret Cummings | 12 | Daughter | — | Illinois |
| 16 | John Cummings THIS PERSON | 10 | Son | — | Illinois |
| 17 | James Cummings | 8 | Son | — | Illinois |
| 18 | Edward Cummings | 5 | Son | — | Illinois |
| 19 | Catherine Cummings | 4 | Daughter | — | Illinois |
| 20 | Alice Cummings | 1 | Daughter | — | Illinois |
| 21 | Casimir Golek | 41 | Head | — | Poland |
| 22 | Mary Golek | 41 | Wife | — | Poland |
| 23 | Cecelia Golek | 13 | Daughter | — | Illinois |
| 24 | Edward Golek | 5 | Son | — | Illinois |
| 25 | Anna Kuzma | 55 | Head | Clerk | Germany |
| 26 | Joe Kuzma | 25 | Son | — | Illinois |
| 27 | Vincent Kuzma | 22 | Son | — | Illinois |
| 28 | Martha Kuzma | 14 | Daughter | — | Illinois |
| 29 | Leo Kuzma | 11 | Son | — | Illinois |
| 30 | Paul Kuzma | 9 | Son | — | Illinois |
| 31 | Charles Johnson | 53 | Head | Fireman | Sweden |
| 32 | Freda Johnson | 48 | Wife | Laborer | Sweden |
| 33 | William Luckas | 42 | Head | Core Maker | Lithuania |
| 34 | Violet Luckas | 38 | Wife | — | Lithuania |
| 35 | Charles Golecki | 50 | Head | Technician | Poland |
| 36 | Nellie Golecki | 38 | Wife | — | Poland |
| 37 | Helen Golecki | 21 | Daughter | Stenographer | Illinois |
| 38 | Mildred Golecki | 18 | Daughter | Stenographer | Illinois |
| 39 | Sophie Golecki | 15 | Daughter | — | Illinois |
| 40 | Julia Golecki | 13 | Daughter | — | Illinois |
| 41 | Edward Golecki | 11 | Son | — | Illinois |
| 42 | Louis Golecki | 4 | Son | — | Illinois |
| 43 | Anna Kukowski | 35 | Head | — | Lithuania |
| 44 | Joseph Kukowski | 12 | Son | — | Illinois |
| 45 | George Kukowski | 11 | Son | — | Illinois |
| 46 | Tony Kukowski | 32 | Brother | Laborer | Lithuania |
| 47 | Michael Kukowski | 31 | Brother | Laborer | Lithuania |
| 48 | Joseph Rodriguez | 35 | Head | Laborer | Mexico |
| 49 | Maria Rodriguez | 35 | Wife | — | Mexico |
| 50 | Frank Rodriguez | 17 | Son | Laborer | Mexico |
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)