HW
Harold Williams — 1940 US Census Record
Model Tree available1940 United States Federal Census · Plymouth-County, Massachusetts
Our Model Tree links this Harold Williams across the 1920, 1930 and 1940 US Censuses in Plymouth-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Florence & Florence — first a head (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Plymouth-County, Massachusetts |
| Surname | Williams |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Newport |
| Additional Details | |
| Occupation | Laborer |
| Industry | General Work |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 550 |
| Highest Grade | H 2 |
| 1935 Residence | Rhode Island |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Laborer |
| Township / Ward | Marion Town |
| Est. Birth Year | ~1917 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Harold Williams | Head | — | 23 | ~1917 |
| Herbert Williams | Son | — | 1 | ~1939 |
| Eugenia Williams | Spouse | — | 20 | ~1920 |
Census Appearances
1920
Plymouth, Massachusetts
Son, age 3
Plymouth, Massachusetts · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Harold H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Plymouth, Massachusetts
Son, age 13
Plymouth, Massachusetts · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Harold S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Student |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Plymouth-County, Massachusetts
Head, age 23
Plymouth-County, Massachusetts · implied b. ~1917 — 3 household members
| Surname | Williams |
| Given Name | Harold |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Newport |
| Occupation | Laborer |
| Industry | General Work |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 550 |
| Highest Grade | H 2 |
| 1935 Residence | Rhode Island |
| 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 Harold Williams across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Florence Williams (~0.92 confidence) and mother Florence Williams (~0.92 confidence) and father Harold Williams (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Florence Williams
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Florence Williams
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
Harold Williams
b. ~1892
Source father
● Household
· direct · ~0.92
This person
Anchor record
Harold Williams
Head · 1940 · age 23 · b. ~1917 · 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 — Plymouth-County, Massachusetts
Open full size
1940 US Federal Census — Plymouth-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01638-00649)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Laura Lopes | 15 | Daughter | — | Massachusetts |
| 2 | Ancelmo Lopes | 57 | Head | Gardner | Cape Verde Islands |
| 3 | Leonora Lopes | 50 | Wife | — | Cape Verde Islands |
| 4 | Edward Lopes | 21 | Son | Laborer | Massachusetts |
| 5 | Julio Lopes | 19 | Son | Laborer | Massachusetts |
| 6 | Walter Lopes | 18 | Son | Ccc | Massachusetts |
| 7 | James Lopes | 15 | Daughter | — | Massachusetts |
| 8 | Antonia Lopes | 14 | Son | — | Massachusetts |
| 9 | Carl Debarros | 47 | Head | Laborer | Massachusetts |
| 10 | Mildred Debarros | 43 | Wife | — | Massachusetts |
| 11 | William Debarros | 20 | Son | — | Massachusetts |
| 12 | Ann Debarros | 17 | Daughter | — | Massachusetts |
| 13 | Russell Debarros | 15 | Son | — | Massachusetts |
| 14 | Lloyd Debarros | 14 | Son | — | Massachusetts |
| 15 | Harold Williams THIS PERSON | 23 | Head | Laborer | Massachusetts |
| 16 | Eugenia Williams | 20 | Wife | — | Rhode Island |
| 17 | Herbert Williams | 1 | Son | — | Massachusetts |
| 18 | Peter Mello | 50 | Head | Laborer | Cape Verde Islands |
| 19 | Louis Mello | 41 | Wife | — | Massachusetts |
| 20 | Leroy Mello | 3 | Son | — | Massachusetts |
| 21 | Frances Mello | 1 | Daughter | — | Massachusetts |
| 22 | Michael Santos | 60 | Lodger | Laborer | Cape Verde Islands |
| 23 | Nela Rodendo | 65 | Head | Laborer | Cape Verde Islands |
| 24 | Casimiro Santos | 42 | Head | Laborer | Cape Verde Islands |
| 25 | Kate Santos | 39 | Wife | — | Cape Verde Islands |
| 26 | Mary Santos | 22 | Daughter | — | Massachusetts |
| 27 | Manuel Silva | 28 | Head | Laborer | Rhode Island |
| 28 | Jessie Silva | 25 | Wife | — | Massachusetts |
| 29 | Lewis Silva | 24 | Head | Laborer | Rhode Island |
| 30 | Catherine Silva | 21 | Wife | — | Massachusetts |
| 31 | Nancy Silva | 3 | Daughter | — | Massachusetts |
| 32 | Patricia Silva | 1 | Daughter | — | Massachusetts |
| 33 | Manuel Pina | 54 | Head | Laborer | Cape Verde Islands |
| 34 | Phylis Pina | 54 | Wife | — | Cape Verde Islands |
| 35 | Vincent Pina | 24 | Son | Truck Driver | Massachusetts |
| 36 | Raymond Pina | 22 | Son | Laborer | Massachusetts |
| 37 | George Pina | 20 | Son | Laborer | Massachusetts |
| 38 | Domingo Pina | 19 | Son | Laborer | Massachusetts |
| 39 | August Pina | 17 | Son | — | Massachusetts |
| 40 | Nicholas Pina | 15 | Son | — | Massachusetts |
Pedigree Summary
Harold
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)