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William Harrington — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this William Harrington across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Male
Son
Born: Maine
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Harrington |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Maine |
| 1935 Residence (City) | Waltham City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Laborer |
| Industry | Contractor |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 500 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Occupation | Laborer |
| Township / Ward | Waltham City |
| Est. Birth Year | ~1913 |
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 |
|---|---|---|---|---|
| Violet Harrington | Spouse | — | 47 | ~1893 |
| William Harrington | Son | — | 27 | ~1913 |
| Doris Harrington | Daughter | — | 22 | ~1918 |
| Jessie Harrington | Daughter | — | 26 | ~1914 |
| William Harrington | Head | — | 53 | ~1887 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 7
Middlesex, Massachusetts · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Middlesex, Massachusetts
Son, age 17
Middlesex, Massachusetts · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Middlesex-County, Massachusetts
Son, age 27
Middlesex-County, Massachusetts · implied b. ~1913 — 5 household members
| Surname | Harrington |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Maine |
| 1935 Residence (City) | Waltham City |
| 1935 Residence (County) | Middlesex |
| Occupation | Laborer |
| Industry | Contractor |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 500 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Harrington across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Harrington (~0.92 confidence) and father William Harrington (~0.92 confidence) and father William Harrington (~0.92 confidence) and mother Violet Harrington (~0.92 confidence) and mother Violet Harrington (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Harrington
b. ~1887
Source father
● Household
· direct · ~0.92
Father
William Harrington
b. ~1887
Source father
● Household
· direct · ~0.92
Father
William Harrington
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Violet Harrington
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Violet Harrington
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Harrington
Son · 1940 · age 27 · b. ~1913 · Massachusetts
★ You are viewing this record
Sibling
Doris Harrington
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jessie Harrington
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01619-00910)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Doris Goliber | 35 | Wife | Lacquerer | Canada E. |
| 42 | Percy W. Ryan | 63 | Head | Janitor | Mass |
| 43 | Clara F. Ryan | 60 | Wife | — | Mass |
| 44 | Emma Kingsbury | 65 | Sister-in-law | — | Mass |
| 45 | Nellie Spencer | 66 | Head | — | Mass |
| 46 | Ruth M. Spencer | 41 | Daughter | Professional Musician | Mass |
| 48 | Edward Mahon | 53 | Head | Assistant Foreman | Mass |
| 49 | Hattie Mahon | 53 | Wife | — | Maine |
| 50 | Muriel Mahon | 24 | Daughter | Stenographer | Mass |
| 51 | Gilbert Mahon | 19 | Son | Clerk | Mass |
| 52 | Edward Father Mahon | 83 | Father | — | Vermont |
| 53 | Wesley W. Palace | 29 | Head | Milk Salesman | Canada E. |
| 54 | Hazel Palace | 24 | Wife | Housework | Canada E. |
| 55 | Wesley Palace | 3 | Son | — | Rhode Island |
| 56 | Joan Palace | 5 | Daughter | — | Mass |
| 57 | Tilbury Tillway | 30 | Head | Salesman | Canada E. |
| 58 | Mildred Tillway | 32 | Wife | Office Girl | Canada E. |
| 59 | Mildred Tillway | 9 | Daughter | — | Mass |
| 60 | Tillway | 6 | Son | — | Mass |
| 61 | John Boates | 35 | Lodger | Clerk | Mass |
| 62 | City Paulee | 40 | Lodger | Laborer | Mass |
| 63 | Bertrand Frost | 36 | Head | Linotype Operator | Mass |
| 64 | Beulah Frost | 33 | Wife | — | Mass |
| 65 | Norman Frost | 6 | Son | — | Mass |
| 66 | Shirley Frost | 5 | Daughter | — | Mass |
| 67 | Donald Frost | 3 | Son | — | Mass |
| 68 | Myles Sweeney | 45 | Head | Machine Maker | Mass |
| 69 | Mary L. Sweeney | 48 | Wife | Clocker | Mass |
| 70 | Geraldine Sweeney | 21 | Daughter | Assembler | Mass |
| 71 | Myles P. Sweeney | 16 | Son | Caddy | Mass |
| 72 | Irene V. Sweeney | 13 | Daughter | — | Mass |
| 73 | John J. Sweeney | 11 | Son | — | Mass |
| 74 | William Harrington | 53 | Head | Painter | Mass |
| 75 | Violet Harrington | 47 | Wife | — | Mass |
| 76 | Jessie Harrington | 26 | Daughter | Teacher | Mass |
| 77 | William Harrington THIS PERSON | 27 | Son | Laborer | Maine |
| 78 | Doris A. Harrington | 22 | Daughter | Secretary | Mass |
| 79 | Frederick Clapp | 56 | Head | Carpenter | Mass |
| 80 | Amy Clapp | 55 | Wife | — | Mass |
Pedigree Summary
William + 2 siblings
Gen 1 · 5 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)