WM
William Mooney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this William Mooney across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Joseph & Thomas — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Mooney |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Salesclerk |
| Industry | Retail grocery |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 120 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Salesclerk |
| Township / Ward | Somerville 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Doris Mooney | Daughter | — | 25 | ~1915 |
| William Mooney | Son | — | 22 | ~1918 |
| Gertrude Mooney | Spouse | — | 49 | ~1891 |
| Lawson Mooney | Son | — | 18 | ~1922 |
| Thomas Mooney | Head | — | 48 | ~1892 |
| Jean Mooney | Daughter | — | 14 | ~1926 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 1
Middlesex, Massachusetts · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mooney |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 11
Middlesex, Massachusetts · implied b. ~1919 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mooney |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 22
Middlesex-County, Massachusetts · implied b. ~1918 — 6 household members
| Surname | Mooney |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Occupation | Salesclerk |
| Industry | Retail grocery |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 120 |
| Highest Grade | Hs 4 |
| 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 Mooney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Mooney (~0.92 confidence) and father Thomas Mooney (~0.92 confidence) and mother Bridget Mooney (~0.92 confidence) and mother Bridget Mooney (~0.92 confidence) and mother Gertrude Mooney (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Mooney
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Thomas Mooney
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Bridget Mooney
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Bridget Mooney
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Gertrude Mooney
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mooney
Son · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Lawson Mooney
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Mooney
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Mooney
Sibling · 1940 · age 25
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
40 people indexed on this census page (nara:1940:m-t0627-01702-00636)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Griffin | 4 | Daughter | — | Massachusetts |
| 2 | John Santos | 57 | Head | — | Portugal |
| 3 | Lena Santos | 52 | Wife | — | Italy |
| 4 | Giacoma Viola | 17 | Head | — | Massachusetts |
| 5 | Ida Viola | 24 | Wife | Sausage-Maker | Massachusetts |
| 6 | Charles Lacombe | 31 | Head | Meat-Packer | Massachusetts |
| 7 | Rose Lacombe | 28 | Wife | Chauffeur | Canada-French |
| 8 | Pauline Lacombe | 8 | Daughter | — | Massachusetts |
| 9 | Charles Lacombe | 6 | Son | — | Massachusetts |
| 10 | James Lacombe | 3 | Son | — | Massachusetts |
| 11 | Manuel Pacheco | 52 | Head | Oiler | Portugal |
| 12 | Marie Pacheco | 46 | Wife | Stitcher | Portugal |
| 13 | Ethel Pacheco | 20 | Daughter | Hairdresser | Massachusetts |
| 14 | Marie Pacheco | 13 | Daughter | — | Massachusetts |
| 15 | Thomas Mooney | 48 | Head | Timekeeper | Canada-English |
| 16 | Gertrude Mooney | 49 | Wife | — | Vermont |
| 17 | Doris Mooney | 25 | Daughter | Secretary | Massachusetts |
| 18 | William Mooney THIS PERSON | 22 | Son | Salesclerk | Massachusetts |
| 19 | Lawson Mooney | 18 | Son | New Worker | Massachusetts |
| 20 | Jean Mooney | 14 | Daughter | — | Massachusetts |
| 21 | Dennis Coveney | 33 | Head | Truck-Driver | Eire |
| 22 | Margaret Coveney | 32 | Wife | — | Massachusetts |
| 23 | William Coveney | 3 | Son | — | Massachusetts |
| 24 | Anthony Freitas | 62 | Father-in-law | Metal-Polisher | Portugal |
| 25 | Thomas Rutherford | 19 | Head | Teamster | Massachusetts |
| 26 | Bridget Rutherford | 54 | Mother | Asst. Building Inspector | Eire |
| 27 | John Flanagan | 54 | Head | — | Eire |
| 28 | Ellen Flanagan | 54 | Wife | — | Eire |
| 29 | John Flanagan | 24 | Son | Carpenter'S Helper | Massachusetts |
| 30 | William Flanagan | 20 | Son | Cook | Massachusetts |
| 31 | Mary Flanagan | 16 | Daughter | — | Massachusetts |
| 32 | Helen Flanagan | 15 | Daughter | — | Massachusetts |
| 33 | Walter Flanagan | 11 | Son | — | Massachusetts |
| 34 | Lawrence Neylon | 25 | Step-son | Machinist Helper | Massachusetts |
| 35 | William Letteri | 29 | Head | Trucking Co. | Massachusetts |
| 36 | Ruth Letteri | 32 | Wife | — | Massachusetts |
| 37 | Ruth Letteri | 12 | Daughter | — | Massachusetts |
| 38 | Dorothy Letteri | 10 | Daughter | — | Massachusetts |
| 39 | William Letteri | 8 | Son | — | Massachusetts |
| 40 | Carol Letteri | 4 | Daughter | — | Massachusetts |
Pedigree Summary
William + 3 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)