WM
William Maloney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Maloney across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Maloney |
| 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 |
| Additional Details | |
| Occupation | Delivery Truck |
| Industry | Dairy Co. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 126 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Delivery Truck |
| Township / Ward | Chicago |
| Est. Birth Year | ~1922 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Maloney | Son | — | 18 | ~1922 |
| Margaret Maloney | Spouse | — | 50 | ~1890 |
| Margaret Maloney | Daughter | — | 19 | ~1921 |
| Martin Maloney | Head | — | 49 | ~1891 |
| Anne Maloney | Daughter | — | 14 | ~1926 |
| Theresa Maloney | Daughter | — | 9 | ~1931 |
| Helen Maloney | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Cook, Illinois
Son, age 8
Cook, Illinois · implied b. ~1922 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maloney |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 18
Cook-County, Illinois · implied b. ~1922 — 7 household members
| Surname | Maloney |
| 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 |
| Occupation | Delivery Truck |
| Industry | Dairy Co. |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 126 |
| Highest Grade | H 2 |
| 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 Maloney across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Maloney
Son · 1940 · age 18 · b. ~1922 · Illinois
★ You are viewing this record
Sibling
Margaret Maloney
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Maloney
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Maloney
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Maloney
Sibling · 1940 · age 14
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
39 people indexed on this census page (nara:1940:m-t0627-00949-00338)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Bridget Jordan | 60 | Wife | — | Illinois |
| 42 | Andrew Jordan | 32 | Son | Lawyer | Illinois |
| 43 | Francis Jordan | 27 | Son | Policeman | Illinois |
| 44 | Thomas Jordan | 25 | Son | Checker | Illinois |
| 45 | Mary Jordan | 22 | Daughter | Bookkeeper | Illinois |
| 46 | Margaret Jordan | 20 | Daughter | Stenographer | Illinois |
| 47 | Martin Maloney | 49 | Head | Laborer | Irish Free State |
| 48 | Margaret Maloney | 50 | Wife | — | Irish Free State |
| 49 | Margaret Maloney | 19 | Daughter | Pencil Maker | Illinois |
| 50 | William Maloney THIS PERSON | 18 | Son | Delivery Truck | Illinois |
| 51 | Helen Maloney | 15 | Daughter | — | Illinois |
| 52 | Anne Maloney | 14 | Daughter | — | Illinois |
| 53 | Theresa Maloney | 9 | Daughter | — | Illinois |
| 54 | Donald Finwall | 28 | Head | Accountant | Illinois |
| 55 | Elizabeth Finwall | 28 | Wife | — | Illinois |
| 56 | May Gilbert | 50 | Mother-in-law | — | Missouri |
| 57 | Clarence Gilbert | 30 | Brother-in-law | Plumber | Michigan |
| 58 | Donald Finwall | 7 | Cousin | — | Illinois |
| 59 | Margaret Guest | 70 | Head | — | New York |
| 60 | Lizzie R. Carter | 84 | Head | — | Maine |
| 61 | Rose O'Connor | 61 | Head | Organist | Illinois |
| 62 | Joseph O'Connor | 56 | Brother | Laborer | Illinois |
| 63 | Francis O'Connor | 53 | Brother | Laborer | Illinois |
| 64 | John Murtaugh | 62 | Head | Police Sergeant | Illinois |
| 65 | Mae Murtaugh | 32 | Daughter | Teacher | Illinois |
| 66 | Rose Murtaugh | 27 | Daughter | Substitute Teacher | Illinois |
| 67 | Mae Casey | 57 | Head | Bookkeeper | Illinois |
| 68 | Elizabeth Casey | 51 | Sister | Stenographer | Illinois |
| 69 | John P. Dugan | 44 | Head | Worker | Illinois |
| 70 | Bernice Dugan | 33 | Wife | — | Illinois |
| 71 | Mary Jane Dugan | 7 | Daughter | — | Illinois |
| 72 | Sophia Lukosheus | 30 | Lodger | Secretary | New Jersey |
| 73 | Raymond Bauer | 39 | Head | Truck Driver | Minnesota |
| 74 | Dorothy Bauer | 44 | Wife | — | Illinois |
| 75 | Raymond Jr. Bauer | 10 | Son | — | Michigan |
| 76 | Raymond Gallagher | 33 | Head | Policeman | Iowa |
| 77 | Lucienne Gallagher | 32 | Wife | — | Illinois |
| 78 | Raymond Gallagher | 5 | Son | — | Illinois |
| 79 | James Gallagher | 3 | 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)