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William Hayes — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this William Hayes across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Daniel & Catherine — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Hayes |
| Given Name | William F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Helper |
| Industry | Registry of Motor Vehicles |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Helper |
| Township / Ward | Boston City |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Daniel Hayes | Head | — | 63 | ~1877 |
| William Hayes | Son | — | 22 | ~1918 |
| James Hayes | Son | — | 26 | ~1914 |
| Catherine Hayes | Spouse | — | 63 | ~1877 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 2
Suffolk, Massachusetts · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| Given Name | William F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 12
Suffolk, Massachusetts · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hayes |
| Given Name | William F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 22
Suffolk-County, Massachusetts · implied b. ~1918 — 4 household members
| Surname | Hayes |
| Given Name | William F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Helper |
| Industry | Registry of Motor Vehicles |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Hayes across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Daniel Hayes (~0.92 confidence) and mother Catherine Hayes (~0.92 confidence) and mother Catherine Hayes (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Daniel Hayes
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Catherine Hayes
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Catherine Hayes
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Hayes
Son · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
James Hayes
Sibling · 1940 · age 26
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01678-00040)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John L Wright | 59 | Head | Clerk | Same House |
| 42 | Harriet L Wright | 52 | Wife | — | Same House |
| 43 | Margaret E Wright | 28 | Daughter | Asst Librarian | Same House |
| 44 | Robert G Wright | 26 | Son | Buyer | Same House |
| 45 | Harriet L Wright | 23 | Daughter | Salesgirl | Same House |
| 46 | Richard H Wright | 23 | Son | Clerk | Same House |
| 47 | Alfred T Wright | 19 | Son | Clerk | Same House |
| 48 | Edward B Galvin | 60 | Head | Trucker | Massachusetts |
| 49 | Grace E Galvin | 57 | Wife | — | Massachusetts |
| 50 | Ruth Galvin | 27 | Daughter | Clerk | Massachusetts |
| 51 | William F Galvin | 25 | Son | Clerk | Massachusetts |
| 52 | Jean P Galvin | 19 | Daughter | — | Massachusetts |
| 53 | Richard Galvin | 12 | Son | — | Massachusetts |
| 54 | Robert Galvin | 12 | Son | — | Massachusetts |
| 55 | Grace M Galvin | 22 | Daughter | — | Rhode Island |
| 56 | John W Winters | 25 | Head | Salesman | New Hampshire |
| 57 | Elizabeth Winters | 22 | Wife | — | Massachusetts |
| 58 | John Jr Winters | 6 | Son | — | Massachusetts |
| 59 | Daniel W Hayes | 63 | Head | Truck Driver | Massachusetts |
| 60 | Catherine A Hayes | 63 | Wife | — | Massachusetts |
| 61 | James E Hayes | 26 | Son | Shipper | Massachusetts |
| 62 | William F Hayes THIS PERSON | 22 | Son | Helper | Massachusetts |
| 63 | Arthur De Pietro | 30 | Head | Inspector | Italy |
| 64 | Josephine M De Pietro | 31 | Wife | — | Massachusetts |
| 65 | James A De Pietro | 5 | Son | — | Massachusetts |
| 66 | Arthur J De Pietro | 2 | Son | — | Massachusetts |
| 67 | Arthur De Pietro | 2 | Son | — | Massachusetts |
| 68 | Adolf P Erickson | 65 | Head | — | Norway |
| 69 | Enya B Erickson | 58 | Wife | — | Norway |
| 70 | Ralph Erickson | 33 | Son | Painter | Norway |
| 71 | Edwin O Erickson | 27 | Son | Painter | Massachusetts |
| 72 | Doris L Erickson | 21 | Daughter | Waitress | Massachusetts |
| 73 | Helen E Erickson | 21 | Daughter | Saleslady | Massachusetts |
| 74 | John Tosi | 30 | Head | Rigger | Massachusetts |
| 75 | Lorraine F Tosi | 23 | Wife | — | Massachusetts |
| 76 | Louise W Hargreaves | 59 | Head | — | Germany |
| 77 | Albert G Hargreaves | 31 | Son | Clerk | Massachusetts |
| 78 | Frederick H Hargreaves | 30 | Son | Examiner | Massachusetts |
| 79 | George A Hargreaves | 22 | Son | Truck Driver | Massachusetts |
| 80 | Walter A Hargreaves | 22 | Son | Assistant | Massachusetts |
Pedigree Summary
William + 1 sibling
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)