WB
William Boyd — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Boyd across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Marie & Cecil — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Boyd |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Helper |
| Industry | Trucking |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 988 |
| Highest Grade | H1 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Helper |
| Township / Ward | Chicago |
| Est. Birth Year | ~1918 |
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 |
|---|---|---|---|---|
| Cecil Boyd | Head | — | 46 | ~1894 |
| Raymond Boyd | Son | — | 16 | ~1924 |
| William Boyd | Son | — | 22 | ~1918 |
| Robert Boyd | Son | — | 23 | ~1917 |
| Marie Boyd | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1918 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| 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/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 22
Cook-County, Illinois · implied b. ~1918 — 5 household members
| Surname | Boyd |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Helper |
| Industry | Trucking |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 988 |
| Highest Grade | H1 |
| 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 Boyd across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Marie Boyd (~0.92 confidence) and father Cecil Boyd (~0.92 confidence) and mother Mary Boyd (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Marie Boyd
b. ~1895
Source mother
● Household
· direct · ~0.92
Father
Cecil Boyd
b. ~1897
Source father
● Household
· direct · ~0.92
Mother
Mary Boyd
b. ~1899
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Boyd
Son · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Robert Boyd
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Boyd
Sibling · 1940 · age 16
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-t0627-00966-00114)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Kriz | 51 | wife | — | Czechoslovakia |
| 2 | Constance Szepura | 53 | head | — | Poland |
| 3 | John Szepura | 28 | son | Laborer | Illinois |
| 4 | John Vachata | 46 | head | Driver | Czechoslovakia |
| 5 | Bessie Vachata | 37 | wife | Cook | Czechoslovakia |
| 6 | Elsie Vachata | 17 | daughter | Waitress | Illinois |
| 7 | Blanche Vachata | 11 | daughter | — | Illinois |
| 8 | Peggy Vachata | 1 | daughter | — | Illinois |
| 9 | Mark Kroz | 81 | head | — | Czechoslovakia |
| 10 | Charles Kroz | 32 | son | Inspector | Illinois |
| 11 | Joseph Kroz | 30 | son | Truck Driver | Illinois |
| 12 | Bessie Kroz | 34 | daughter | — | Illinois |
| 13 | Lillian Kroz | 27 | daughter | Typist | Illinois |
| 14 | Henry Candra | 44 | head | Packer | Illinois |
| 15 | Anna Candra | 38 | wife | Telephone Opr | Illinois |
| 16 | Adeline Candra | 13 | daughter | — | Illinois |
| 17 | Anna Blake | 41 | head | — | Ohio |
| 18 | Alma Blake | 21 | daughter | Wrapper | Ohio |
| 19 | Joseph Marek | 55 | head | Carpenter | Czechoslovakia |
| 20 | Maria Marek | 62 | wife | — | Czechoslovakia |
| 21 | Anna Nosil | 18 | head | — | Illinois |
| 22 | Charles Nosil | 9 | son | — | Wisconsin |
| 23 | Joseph Nosil | 5 | son | — | Illinois |
| 24 | Miles Miskovsky | 41 | head | Restaurant | Czechoslovakia |
| 25 | Marie Miskovsky | 47 | sister | Cook | Czechoslovakia |
| 26 | Joseph Hruza | 54 | head | Building Loan | Illinois |
| 27 | Anna Hruza | 53 | wife | — | Illinois |
| 28 | Joseph Hruza | 21 | son | Order Filler | Illinois |
| 29 | Adolph Hruza | 30 | son | Laborer | Illinois |
| 30 | Alice Hruza | 25 | wife | — | Illinois |
| 31 | Arlene Hruza | 4 | granddaughter | — | Illinois |
| 32 | Charles J. Hessler | 50 | head | Chauffeur | Illinois |
| 33 | Marie Hessler | 50 | wife | — | Czechoslovakia |
| 34 | F. C. Halberstadt | 24 | stepson | Mech. Engineer | Illinois |
| 35 | James Hessler | 75 | father | — | Czechoslovakia |
| 36 | Cecil Boyd | 46 | head | Type Setter | Illinois |
| 37 | Marie Boyd | 45 | wife | — | Illinois |
| 38 | Robert Boyd | 23 | son | Office Work | Illinois |
| 39 | William Boyd THIS PERSON | 22 | son | Helper | Illinois |
| 40 | Raymond Boyd | 16 | son | — | Illinois |
Pedigree Summary
William + 2 siblings
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)