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William Leonard — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this William Leonard across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Louisa & Thomas — first a head (b.~1898), then head of a 6-person household.
Age 42
b. ~1898
Male
Head
Born: Rhode Island
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Leonard |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Rhode Island |
| 1935 Residence (City) | Hyde Park |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Fireman |
| Industry | Fire Dept. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2400 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
| Occupation | Fireman |
| Township / Ward | Hyde Park |
| Est. Birth Year | ~1898 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Leonard | Head | — | 42 | ~1898 |
| Thomas Leonard | Other | — | 34 | ~1906 |
| Emily Caccavaro | Other | — | 70 | ~1870 |
| William Leonard | Son | — | 19 | ~1921 |
| Robert Leonard | Son | — | 15 | ~1925 |
| Marie Leonard | Spouse | — | 43 | ~1897 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 22
Suffolk, Massachusetts · implied b. ~1898 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Rhode Island |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Machinist |
| Industry | Car-shop |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1930
Suffolk, Massachusetts
Head, age 32
Suffolk, Massachusetts · implied b. ~1898 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | William H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Rhode Island |
| Age at First Marriage | 22 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Fireman |
| Industry | City of Boston |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Radio Set | R |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
1940
Suffolk-County, Massachusetts
Head, age 42
Suffolk-County, Massachusetts · implied b. ~1898 — 6 household members
| Surname | Leonard |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Rhode Island |
| 1935 Residence (City) | Hyde Park |
| 1935 Residence (County) | Suffolk |
| Occupation | Fireman |
| Industry | Fire Dept. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2400 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Rhode Island |
| Birth Country | United States |
| Birthplace (normalized) | rhode island |
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 Leonard across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Louisa Leonard (~0.92 confidence) and father Thomas Leonard (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Louisa Leonard
b. ~1869
Source mother
● Household
· direct · ~0.92
Father
Thomas Leonard
b. ~1869
Source father
● Household
· direct · ~0.92
This person
Anchor record
William Leonard
Head · 1940 · age 42 · b. ~1898 · Massachusetts
★ You are viewing this record
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-t0627-01678-00157)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Macarkle | 60 | Brother-in-law | Salesman | Massachusetts |
| 2 | James Lindman | 15 | Granddaughter | — | Massachusetts |
| 3 | George L. Taylor | 42 | Head | Supervisor | Massachusetts |
| 4 | Dorothy S. Taylor | 42 | Wife | Housewife | Massachusetts |
| 5 | Jane Taylor | 14 | Daughter | — | Massachusetts |
| 6 | Peter J. Faherry | 26 | Head | Salesman | New York |
| 7 | Rosalie A. Faherry | 26 | Wife | Housewife | New York |
| 8 | Rosalie A. Faherry | 1 | Daughter | — | New York |
| 9 | William L. Henderson | 69 | Head | Salesman | Penn. U.S.A. |
| 10 | Mabel L. Henderson | 63 | Wife | Housewife | Massachusetts |
| 11 | Ada L. Harding | 80 | Mother-in-law | — | Massachusetts |
| 12 | Galen Holmes | 50 | Roomer | Upholsterer | Maine |
| 13 | Charles Topham | 41 | Roomer | Builder | Massachusetts |
| 14 | William H. Leonard THIS PERSON | 42 | Head | Fireman | Rhode Island |
| 15 | Marie E. Leonard | 43 | Wife | Housewife | Massachusetts |
| 16 | William H. Leonard | 19 | Son | — | Massachusetts |
| 17 | Robert F. Leonard | 15 | Son | — | Massachusetts |
| 18 | Emily Caccavaro | 70 | Mother-in-law | Housework | Lithuania |
| 19 | Thomas C. Leonard | 34 | Brother | Clerk | Rhode Island |
| 20 | F. B. Stevens | 72 | Head | Dentist | Maine |
| 21 | Emeline B. Stevens | 63 | Wife | Housewife | Vermont |
| 22 | George H. D. Earl | 76 | Head | Retired Teacher | Maine |
| 23 | Mary H. Earl | 76 | Wife | Housewife | Maine |
| 24 | Block 48 Ends. Block 49 Starts. | None | — | — | — |
| 25 | Marrell Goodwin | 25 | Head | Order Clerk | Maine |
| 26 | Estella Goodwin | 23 | Wife | Housewife | Maine |
| 27 | Barbara Goodwin | 2 | Daughter | — | Massachusetts |
| 28 | Winthrop Goodwin | 0 | Son | — | Massachusetts |
| 29 | Roy Hallstrom | 36 | Roomer | Truck Driver | Massachusetts |
| 30 | Frederick Hartman | 35 | Head | Machinist | Germany |
| 31 | Walter Hartman | 33 | Brother | Sheet Metal Worker | Germany |
| 32 | Carl Hartman | 27 | Brother | Inspector | Germany |
| 33 | Mary Hogan | 62 | Head | Housework | Massachusetts |
| 34 | Dorothy Moriarty | 31 | Daughter | Bookkeeper | Massachusetts |
| 35 | Eileen Shea | 28 | Daughter | Comp. Operator | Massachusetts |
| 36 | Patricia Moriarty | 7 | Granddaughter | — | Massachusetts |
| 37 | John Moriarty | 5 | Grandson | — | Massachusetts |
| 38 | Richard Moriarty | 4 | Grandson | — | Massachusetts |
| 39 | Marilyn Shea | 2 | Granddaughter | — | Massachusetts |
| 40 | Rose B. Adams | 67 | Head | Housewife | Maine |
Pedigree Summary
William
Gen 1 · 2 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)