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William Larson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this William Larson across the 1920, 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Lars & Anna — first a son (b.~1906), then head of a 4-person household.
Age 34
b. ~1906
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Massachusetts |
| Surname | Larson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Millville Town |
| 1935 Residence (County) | Worcester |
| Additional Details | |
| Occupation | Labor |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 474 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Labor |
| Township / Ward | Millville Town |
| Est. Birth Year | ~1906 |
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 |
|---|---|---|---|---|
| Hilma Larson | Daughter | — | 48 | ~1892 |
| William Larson | Son | — | 34 | ~1906 |
| Lars Larson | Head | — | 68 | ~1872 |
| Anna Larson | Spouse | — | 72 | ~1868 |
Census Appearances
1920
Worcester, Massachusetts
Son, age 13
Worcester, Massachusetts · implied b. ~1907 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Denmark |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Worcester, Massachusetts
Son, age 24
Worcester, Massachusetts · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Denmark |
| Occupation | Spinner |
| Industry | Woolen Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Worcester-County, Massachusetts
Son, age 34
Worcester-County, Massachusetts · implied b. ~1906 — 4 household members
| Surname | Larson |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Millville Town |
| 1935 Residence (County) | Worcester |
| Occupation | Labor |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 474 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| 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 Larson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Lars Larson (~0.92 confidence) and mother Anna Larson (~0.92 confidence) and mother Annie Larson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Lars Larson
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Anna Larson
b. ~1868
Source mother
● Household
· direct · ~0.92
Mother
Annie Larson
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Larson
Son · 1940 · age 34 · b. ~1906 · Massachusetts
★ You are viewing this record
Sibling
Hilma Larson
Sibling · 1940 · age 48
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 — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01652-00798)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William J. O'Brien | 46 | Head | Labor | Massachusetts |
| 2 | Margaret O'Brien | 47 | Wife | — | Massachusetts |
| 3 | Margaret T. O'Brien | 17 | Daughter | — | Massachusetts |
| 4 | Helen O'Brien | 16 | Daughter | — | Massachusetts |
| 5 | William Jr. O'Brien | 16 | Son | — | Massachusetts |
| 6 | Christina O'Brien | 14 | Daughter | — | Massachusetts |
| 7 | Edwin Hanson | 43 | Head | Labor | Iowa |
| 8 | Lucy Hanson | 37 | Wife | — | Canada-French |
| 9 | Lucial Hanson | 15 | Daughter | — | Massachusetts |
| 10 | Dorothy Hanson | 13 | Daughter | — | Massachusetts |
| 11 | Gustaf Peterson | 47 | Head | — | Norway |
| 12 | Fanny Peterson | 45 | Wife | Rubber | Sweden |
| 13 | Myrtle Peterson | 20 | Daughter | Dauffer | Massachusetts |
| 14 | Lars Larson | 68 | Head | — | Sweden |
| 15 | Anna Larson | 72 | Wife | — | Denmark |
| 16 | Hilma Larson | 48 | Daughter | Waitress | Massachusetts |
| 17 | William Larson THIS PERSON | 34 | Son | Labor | Massachusetts |
| 18 | Joseph Stinek | 56 | Head | Dyer | Poland |
| 19 | Anna Stinek | 43 | Wife | — | Poland |
| 20 | Stanley Stinek | 23 | Son | Labor | Rhode Island |
| 21 | Walter Stinek | 18 | Son | — | Rhode Island |
| 22 | John Stinek | 16 | Son | — | Rhode Island |
| 23 | Josephine Stinek | 15 | Daughter | — | Rhode Island |
| 24 | Helen Stinek | 11 | Daughter | — | Massachusetts |
| 25 | Rosina Quist | 30 | Head | — | Vermont |
| 26 | Ruth Quist | 11 | Daughter | — | Massachusetts |
| 27 | Paul Quist | 10 | Son | — | Massachusetts |
| 28 | Jean Quist | 5 | Daughter | — | Massachusetts |
| 29 | Rebecca Quist | 4 | Daughter | — | Massachusetts |
| 30 | Martha Quist | 1 | Daughter | — | Massachusetts |
| 31 | Patrick Loddy | 70 | Head | — | Newfoundland |
| 32 | Margaret Loddy | 70 | Wife | — | Newfoundland |
| 33 | Susan Loddy | 39 | Daughter | Sewer | Massachusetts |
| 34 | Mary Loddy | 37 | Daughter | Sewer | Massachusetts |
| 35 | Margaret Mcray | 43 | Daughter | — | Massachusetts |
| 36 | Margaret Hem | 50 | Head | Housekeeper | Norway |
| 37 | Oscar Hem | 21 | Son | Watchman | Massachusetts |
| 38 | Harry Hem | 17 | Son | Farmer | Massachusetts |
| 39 | Margaret Hem | 20 | Daughter | — | Massachusetts |
| 40 | David Hem | 14 | Son | — | 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)