WF
William Flynn — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Flynn across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Joseph & Lydia — first a head (b.~1908), then head of a 6-person household.
Age 32
b. ~1908
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Flynn |
| Given Name | William P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | presser |
| Industry | Tailor |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1900 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Presser |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1908 |
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 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Catherine Flynn | Daughter | — | 6 | ~1934 |
| Cora Flynn | Daughter | — | 8 | ~1932 |
| Mary Flynn | Daughter | — | 2 | ~1938 |
| William Flynn | Head | — | 32 | ~1908 |
| John Malloy | Other | — | 57 | ~1883 |
| Anna Flynn | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1908 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Shipping clerk |
| Industry | Retail dry goods |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 32
Cook-County, Illinois · implied b. ~1908 — 6 household members
| Surname | Flynn |
| Given Name | William P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Occupation | presser |
| Industry | Tailor |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1900 |
| 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 Flynn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Flynn (~0.92 confidence) and mother Lydia Flynn (~0.92 confidence) and father Joseph Flynn (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Flynn
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Lydia Flynn
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
Joseph Flynn
b. ~1888
Source father
● Household
· direct · ~0.92
This person
Anchor record
William Flynn
Head · 1940 · age 32 · b. ~1908 · Illinois
★ You are viewing this record
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-t0627-00942-00417)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary J. Mcnamara | 23 | daughter | Operator | Illinois |
| 42 | Annetta Mcnamara | 20 | daughter | File Clerk | Illinois |
| 43 | Irvine Mcnamara | 17 | daughter | — | Illinois |
| 44 | Theresa Mcnamara | 11 | daughter | — | Illinois |
| 45 | John Mcnamara | 8 | son | — | Illinois |
| 46 | James Whalen | 38 | Head | Fireman | Illinois |
| 47 | Lillian D. Whalen | 33 | wife | — | Illinois |
| 48 | Anne Whalen | 7 | daughter | — | Illinois |
| 49 | Joan Whalen | 6 | daughter | — | Illinois |
| 50 | Lillian Whalen | 4 | daughter | — | Illinois |
| 51 | Emma Gould | 68 | Mother-in-law | — | Canada |
| 52 | Martin Mgetich | 46 | Head | Truck Driver | Yugoslavia |
| 53 | Mary Mgetich | 34 | wife | — | Illinois |
| 54 | Brenda Mgetich | 14 | daughter | — | Illinois |
| 55 | Margie Mgetich | 11 | daughter | — | Illinois |
| 56 | William P. Flynn THIS PERSON | 32 | Head | Presser | Illinois |
| 57 | Anna K. Flynn | 31 | wife | — | Illinois |
| 58 | Cora K. Flynn | 8 | daughter | — | Illinois |
| 59 | Catherine Ann Flynn | 6 | daughter | — | Illinois |
| 60 | Mary Lou Flynn | 2 | daughter | — | Illinois |
| 61 | John Malloy | 57 | Lodger | Pit Recorder | Illinois |
| 62 | Thomas Roderick | 47 | Head | Patternmaker | Illinois |
| 63 | Margaret Roderick | 44 | wife | — | Illinois |
| 64 | Thomas W. Roderick | 25 | son | Labor | Illinois |
| 65 | Jean Roderick | 20 | daughter | Waitress | Illinois |
| 66 | Marion Roderick | 18 | son | — | Illinois |
| 67 | Marcus Strook | 76 | Head | — | Holland |
| 68 | Victor Strook | 37 | son | Clerk | Illinois |
| 69 | Virgil Iannetta | 62 | Head | Sampleman | Italy |
| 70 | Dominick Iannetta | 32 | daughter | Stenographer | Illinois |
| 71 | Caroline Iannetta | 28 | daughter | — | Illinois |
| 72 | Mark Iannetta | 14 | son | New Worker | Illinois |
| 73 | John Nigey | 62 | Head | Machinist | Ohio |
| 74 | Mary Nigey | 54 | wife | — | Illinois |
| 75 | Anna Nigey | 29 | daughter | Teller | Illinois |
| 76 | John Nigey | 24 | son | Salesman | Illinois |
| 77 | James Nigey | 21 | son | Machinist Apprentice | Illinois |
| 78 | Thomas Nigey | 19 | son | — | Illinois |
| 79 | Beth Nigey | 19 | daughter | — | Illinois |
| 80 | Harry Nigey | 17 | son | — | Illinois |
Pedigree Summary
William
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)