WJ
William John — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this William John across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 6-person household.
Age 9
b. ~1921
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | John |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1921 |
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 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Margaret John | Daughter | — | 6 | ~1924 |
| Margaret John | Spouse | — | 30 | ~1900 |
| William John | Head | — | 32 | ~1898 |
| Mary John | Daughter | — | 3 | ~1927 |
| William John | Son | — | 9 | ~1921 |
| Elizabeth John | Daughter | — | 7 | ~1923 |
Census Appearances
1930
Cook, Illinois
Son, age 9
Cook, Illinois · implied b. ~1921 — 6 household members
| Surname | John |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| 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 18
Cook-County, Illinois · implied b. ~1922 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johns |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| 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 William John across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William John
Son · 1930 · age 9 · b. ~1921 · Illinois
★ You are viewing this record
Sibling
Margaret John
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary John
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth John
Sibling · 1930 · age 7
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
49 people indexed on this census page (ia:1930:illinoiscensus00reel444:0358)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fredrick Allen | 66 | Head | Mail Clerk | England |
| 2 | Sara E Allen | 63 | Wife | — | New York |
| 3 | John E Vincent | 55 | Roomer | Freight Handler | New York |
| 4 | Arthur C Seguin | 50 | Head | Salesman | Illinois |
| 5 | Gertrude Seguin | 44 | Wife | — | Ireland |
| 6 | Arthur Seguin | 27 | Son | — | Illinois |
| 7 | Francis Seguin | 17 | Son | Clerk | Illinois |
| 8 | Gertrude Seguin | 15 | Daughter | — | Illinois |
| 9 | Fred Seguin | 14 | Son | — | Illinois |
| 10 | Dan Leslie | 30 | Roomer | Shipping Clerk | Illinois |
| 11 | George M Dunn | 42 | Head | Window Cleaner | Scotland |
| 12 | Annie Dunn | 42 | Wife | — | Scotland |
| 13 | Charles D Dunn | 11 | Son | — | Canada |
| 14 | Jessie L Dunn | 9 | Daughter | — | Canada |
| 15 | George A Dunn | 7 | Son | — | Canada |
| 16 | Dorothy H Dunn | 5 | Daughter | — | Canada |
| 17 | Edward J Phalon | 41 | Head | Hauling | Illinois |
| 18 | Florence M Phalon | 37 | Wife | — | Illinois |
| 19 | Maude L Phalon | 16 | Daughter | Operator | Illinois |
| 20 | Sumner Phalon | 13 | Son | — | Illinois |
| 21 | Edward J Phalon | 8 | Son | — | Illinois |
| 22 | Gloria F Phalon | 1 | Daughter | — | Illinois |
| 23 | William Kennedy | 47 | Head | Laborer | Illinois |
| 24 | Mary Kennedy | 40 | Wife | — | Ireland |
| 25 | William Cavanaugh | 42 | Head | Manager | New York |
| 26 | Emma Cavanaugh | 40 | Wife | — | Illinois |
| 27 | Edwin C Cavanaugh | 20 | Son | App. Electrician | Illinois |
| 28 | Florence G Cavanaugh | 17 | Daughter | — | Illinois |
| 29 | William J Cavanaugh | 13 | Son | — | Illinois |
| 30 | Thomas Donovan | 46 | Head | Freight Clerk | Ireland |
| 31 | Hannah Donovan | 42 | Wife | — | Ireland |
| 32 | James F Donovan | 14 | Son | — | Ireland |
| 33 | William A John | 32 | Head | Motorman | Illinois |
| 34 | Margaret John | 30 | Wife | — | Illinois |
| 35 | William J John THIS PERSON | 9 | Son | — | Illinois |
| 36 | Elizabeth J John | 7 | Daughter | — | Illinois |
| 37 | Margaret B John | 6 | Daughter | — | Illinois |
| 38 | Mary Ellen John | 3 | Daughter | — | Illinois |
| 39 | Arthur H Kelly | 38 | Head | Clerical | Illinois |
| 40 | Elizabeth M Kelly | 34 | Wife | — | Illinois |
| 41 | Arthur E Kelly | 11 | Son | — | Illinois |
| 42 | Catherine E Kelly | 10 | Daughter | — | Illinois |
| 43 | Margaret M Kelly | 4 | Daughter | — | Illinois |
| 44 | Anna M Welch | 17 | Sister | — | Illinois |
| 45 | Thomas Westerman | 66 | Head | Teamster | Ireland |
| 46 | Zoe Westerman | 60 | Wife | — | Ohio |
| 47 | Mathias Westerman | 27 | Son | Truck Driver | Illinois |
| 48 | Thomas Jr Westerman | 23 | Son | Truck Driver | Illinois |
| 49 | Joseph Westerman | 21 | Son | Shipping Clerk | 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)