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James Boyle — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Boyle across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Boyle |
| Given Name | James J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Industry | 0 |
| Class of Worker | 0 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1919 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Boyle | Son | — | 21 | ~1919 |
| John Boyle | Head | — | 58 | ~1882 |
| Anna Boyle | Spouse | — | 56 | ~1884 |
| Anna Boyle | Daughter | — | 14 | ~1926 |
| Elizabeth Boyle | Daughter | — | 27 | ~1913 |
| Gertrude Boyle | Daughter | — | 19 | ~1921 |
| Mary Boyle | Daughter | — | 25 | ~1915 |
| Martin Boyle | Son | — | 15 | ~1925 |
Census Appearances
1930
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyle |
| Given Name | James Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| 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 21
Cook-County, Illinois · implied b. ~1919 — 8 household members
| Surname | Boyle |
| Given Name | James J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Industry | 0 |
| Class of Worker | 0 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 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 James Boyle across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Boyle
Son · 1940 · age 21 · b. ~1919 · Illinois
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Sibling
Martin Boyle
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Boyle
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Boyle
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Boyle
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Boyle
Sibling · 1940 · age 25
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
35 people indexed on this census page (nara:1940:m-t0627-01021-00519)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 42 | Ambrose F. Frome | 56 | Head | Plumber | Pennsylvania |
| 43 | Marie Frome | 51 | Wife | Shopkeeper | Illinois |
| 44 | Fridolin Schwartz | 75 | Head | Proprietor | Germany |
| 45 | Theresa Schwartz | 63 | Wife | — | Illinois |
| 46 | Raymond Schwartz | 34 | Son | Auto Mechanic | Illinois |
| 48 | John F. Baker | 27 | Head | Lawyer | Illinois |
| 49 | Mary S. Baker | 26 | Wife | — | Illinois |
| 50 | John F. Baker | 6 | Son | — | Illinois |
| 51 | Mary Anne Baker | 2 | Daughter | — | Illinois |
| 52 | Dempster Weaver | 31 | Head | Interior Decorator | New York |
| 53 | Ida Weaver | 65 | Wife | — | Iowa |
| 54 | Catherine Homer | 52 | Lodger | Housekeeper | England |
| 55 | Carmen Homer | 9 | Lodger | — | Illinois |
| 56 | Helen Stalford | 35 | Head | File Clerk | Illinois |
| 57 | Margaret Stalford | 75 | Mother | — | Canada English |
| 58 | John J. Boyle | 58 | Head | Proprietor | Irish Free State |
| 59 | Anna C. Boyle | 56 | Wife | — | Illinois |
| 60 | Elizabeth Boyle | 27 | Daughter | Biller | Illinois |
| 61 | Mary Helen Boyle | 25 | Daughter | Stenographer | Illinois |
| 62 | James J. Boyle THIS PERSON | 21 | Son | — | Illinois |
| 63 | Gertrude Boyle | 19 | Daughter | — | Illinois |
| 64 | Martin J. Boyle | 15 | Son | — | Illinois |
| 65 | Anna Boyle | 14 | Daughter | — | Illinois |
| 66 | Mary Hamill | 50 | Head | Janitress | Rochester, N.Y. |
| 67 | James Hamill | 25 | Son | Clerk | Illinois |
| 68 | John Hamill | 20 | Son | Clerk | Illinois |
| 70 | Raymond Schwartz | 48 | Head | Accountant | Wisconsin |
| 71 | Emma Schwartz | 35 | Wife | — | Wisconsin |
| 72 | Joan Schwartz | 6 | Daughter | — | Illinois |
| 73 | Ronald Schwartz | 4 | Son | — | Illinois |
| 74 | Gerald Schwartz | 2 | Son | — | Michigan |
| 76 | Nick Farin | 31 | Head | Factory Worker | Illinois |
| 77 | Sophia Farin | 23 | Wife | Owner-Beauty Operator | Illinois |
| 79 | Daniel Curtis | 64 | Head | Owner Manager | Russia |
| 80 | Barney Curtis | 40 | Son | Salesman | 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)