WD
William Dwyer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Dwyer across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 5-person household.
Age 19
b. ~1921
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Dwyer |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | H-2 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Dwyer | Daughter | — | 21 | ~1919 |
| Clements Dwyer | Head | — | 43 | ~1897 |
| William Dwyer | Son | — | 19 | ~1921 |
| John Dwyer | Son | — | 20 | ~1920 |
| Clarence Dwyer | Son | — | 23 | ~1917 |
Census Appearances
1930
Cook, Illinois
Son, age 8
Cook, Illinois · implied b. ~1922 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dwyer |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | New York |
| Mother's Birthplace | Illinois |
| Occupation | none |
| 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 — 5 household members
| Surname | Dwyer |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | H-2 |
| 1935 Residence | Same house |
| 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 Dwyer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Dwyer
Son · 1940 · age 19 · b. ~1921 · Illinois
★ You are viewing this record
Sibling
Clarence Dwyer
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Dwyer
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Dwyer
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-t0627-00936-00343)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Henry Grubb | 85 | Father | — | Illinois |
| 42 | Byrne Grubb | 73 | Mother | — | Ohio |
| 43 | Reynold Olson | 27 | Head | Electrician | Illinois |
| 44 | Mildred Olson | 26 | Wife | — | Illinois |
| 45 | Jean Olson | 2 | Daughter | — | Illinois |
| 46 | Edward Perline | 45 | Head | Shipper | Illinois |
| 47 | Violet Perline | 39 | Wife | Typist | New York |
| 48 | Joseph S. Powell | 28 | Head | Locomotive Fireman | Illinois |
| 49 | Mae Powell | 49 | Sister | Stenographer | Illinois |
| 50 | William Degashus | 29 | Head | Budget Control | Illinois |
| 51 | Marie Degashus | 27 | Wife | — | Indiana |
| 52 | Leo Dreas | 34 | Head | Cokemachineman | Illinois |
| 53 | Eleanor Dreas | 32 | Wife | Sales Clerk | Illinois |
| 54 | John Azymanski | Szymanski | 27 | Head | Credit Manager | Indiana |
| 55 | Theresa Azymanski | Szymanski | 22 | Wife | Bookkeeper | Illinois |
| 56 | Edward Stock | 38 | Head | Salesman | Illinois |
| 57 | Harriet Stock | 37 | Wife | — | Illinois |
| 58 | Barbara Stock | 5 | Daughter | — | Illinois |
| 59 | Henry Kaplan | 25 | Head | Ammonia Plant Operator | Illinois |
| 60 | Shirley Kaplan | 22 | Wife | Comptometer Operator | Illinois |
| 61 | Clements Dwyer | 43 | Head | Paper Cutter | New York |
| 62 | Clarence Dwyer | 23 | Son | Clerical Work | Illinois |
| 63 | Eleanor Dwyer | 21 | Daughter | — | Illinois |
| 64 | John Dwyer | 20 | Son | Mill Helper | Illinois |
| 65 | William Dwyer THIS PERSON | 19 | Son | — | Illinois |
| 66 | Stanley Jozefowicz | 33 | Head | Boilermaker | Poland |
| 67 | Katherine Jozefowicz | 32 | Wife | Cashier | Illinois |
| 68 | Emory Vinzens | 46 | Head | Armature Winder | Illinois |
| 69 | Vera Vinzens | 45 | Wife | — | Indiana |
| 70 | Robert Amart | 32 | Head | Ornithologist | Ohio |
| 71 | Vera Amart | 29 | Wife | — | England |
| 72 | Barbara Amart | 2 | Daughter | — | Illinois |
| 73 | John Cipparone | 30 | Head | Hooker | Michigan |
| 74 | Gabriella Cipparone | 29 | Wife | Cutter | Michigan |
| 75 | Jack Glaser | 29 | Head | Clerk-Truck Dept | Pennsylvania |
| 76 | Loretta Glaser | 28 | Wife | — | Illinois |
| 77 | Byron Glaser | 2 | Son | — | Illinois |
| 78 | Barney Moses | 35 | Head | Salesman | Illinois |
| 79 | Harriet Moses | 33 | Wife | — | Illinois |
| 80 | Sandra Moses | 2 | Daughter | — | Illinois |
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)