ED
Edward Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Edward Duffy across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 10-person household.
Age 14
b. ~1926
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Duffy |
| Given Name | Edward |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Industry | 0 |
| Class of Worker | No |
| Highest Grade | Hs-1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1926 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Edward | Age | Birth yr |
|---|---|---|---|---|
| Geraldine Duffy | Daughter | — | 13 | ~1927 |
| Harriett Duffy | Daughter | — | 21 | ~1919 |
| Estelle Duffy | Spouse | — | 42 | ~1898 |
| Virginia Duffy | Daughter | — | 22 | ~1918 |
| Edward Duffy | Head | — | 46 | ~1894 |
| Lee Duffy | Son | — | 1 | ~1939 |
| Eugene Duffy | Son | — | 11 | ~1929 |
| Lawrence Duffy | Son | — | 5 | ~1935 |
| Catherine Duffy | Other | — | 85 | ~1855 |
| Edward Duffy | Son | — | 14 | ~1926 |
Census Appearances
1930
Cook, Illinois
Son, age 4
Cook, Illinois · implied b. ~1926 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Edward |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | New York |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 14
Cook-County, Illinois · implied b. ~1926 — 10 household members
| Surname | Duffy |
| Given Name | Edward |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Industry | 0 |
| Class of Worker | No |
| Highest Grade | Hs-1 |
| 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 Edward Duffy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Edward Duffy
Son · 1940 · age 14 · b. ~1926 · Illinois
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Sibling
Harriett Duffy
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geraldine Duffy
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Duffy
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lee Duffy
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Duffy
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Duffy
Sibling · 1940 · age 22
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-t0627-00996-00278)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George W Dee | 44 | head | Detail Box Salesman | Illinois |
| 2 | Edna Dee | 44 | wife | — | Illinois |
| 3 | Robert Dee | 14 | son | — | Illinois |
| 4 | Mary Cassidy | 68 | mother in law | — | Illinois |
| 5 | William Schremm | 65 | head | — | Illinois |
| 6 | Anna Schremm | 64 | wife | — | Illinois |
| 7 | Frank Adams | 41 | head | Stereotyper | Illinois |
| 8 | Clara Adams | 40 | wife | — | Illinois |
| 9 | Russell Adams | 13 | son | — | Illinois |
| 10 | Virginia Adams | 11 | daughter | — | Illinois |
| 11 | Sam Kite | 45 | head | Installment Collector | Russia |
| 12 | Jennie Kite | 45 | wife | — | Russia |
| 13 | Jacob Kite | 17 | son | — | Illinois |
| 14 | Esther Kite | 15 | daughter | — | Illinois |
| 15 | Edward Duffy | 46 | head | Sign Painter | Illinois |
| 16 | Estelle Duffy | 42 | wife | — | New York |
| 17 | Virginia Duffy | 22 | daughter | Photo Colorer | Michigan |
| 18 | Harriett Duffy | 21 | daughter | Photo Colorer | Michigan |
| 19 | Edward Duffy THIS PERSON | 14 | son | — | Illinois |
| 20 | Geraldine Duffy | 13 | daughter | — | Illinois |
| 21 | Eugene Duffy | 11 | son | — | Illinois |
| 22 | Lawrence Duffy | 5 | son | — | Illinois |
| 23 | Lee Duffy | 1 | son | — | Illinois |
| 24 | Catherine Duffy | 85 | Mother | — | Massachusetts |
| 25 | Esther O'Brien | 41 | head | Manager | Illinois |
| 26 | Lenore O'Brien | 21 | daughter | Clerk | Illinois |
| 27 | Louis O'Brien | 14 | son | Clerk | Illinois |
| 28 | Marguerite O'Brien | 12 | daughter | — | Illinois |
| 29 | Johanna Scocchi | 65 | mother | — | Italy |
| 30 | John D Nolan | 58 | head | Accountant | Illinois |
| 31 | Mary E Nolan | 66 | wife | — | Illinois |
| 32 | Catherine Cavanaugh | 41 | head | Embroidery Operator | Illinois |
| 33 | John Cavanaugh | 19 | son | Offset Printer | Illinois |
| 34 | Roseanne Cavanaugh | 16 | daughter | — | Illinois |
| 35 | William Gibbon | 40 | head | Mechanical Supervisor | Iowa |
| 36 | Clara Gibbon | 30 | wife | — | Illinois |
| 37 | Eugene Gibbon | 10 | son | — | Iowa |
| 38 | Albert Palucci | 43 | head | Wallpaper Salesman | Italy |
| 39 | Bella Palucci | 36 | wife | — | Illinois |
| 40 | Albert Palucci | 1 | son | — | 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)