WM
William Mccarthy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this William Mccarthy across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Patrick & Margaret — first a head (b.~1912), then head of a 3-person household.
Age 28
b. ~1912
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Wrecker |
| Industry | Housing Project |
| Class of Worker | GW |
| Hours Worked | 28 |
| Income (1939) | 632 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Wrecker |
| Township / Ward | Boston |
| Est. Birth Year | ~1912 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Barbara Mccarthy | Daughter | — | 7 | ~1933 |
| William Mccarthy | Head | — | 28 | ~1912 |
| Ruth Mccarthy | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 6
Suffolk, Massachusetts · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 17
Suffolk, Massachusetts · implied b. ~1913 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Student |
| Class of Worker | XXXX |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Head, age 28
Suffolk-County, Massachusetts · implied b. ~1912 — 3 household members
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Wrecker |
| Industry | Housing Project |
| Class of Worker | GW |
| Hours Worked | 28 |
| Income (1939) | 632 |
| Highest Grade | Hs 2 |
| 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 Mccarthy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Patrick Mccarthy (~0.92 confidence) and mother Margaret Mccarthy (~0.92 confidence) and father Daniel Mccarthy (~0.92 confidence) and mother Abigail Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Patrick Mccarthy
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Margaret Mccarthy
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
Daniel Mccarthy
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Abigail Mccarthy
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mccarthy
Head · 1940 · age 28 · b. ~1912 · 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-t0627-01669-00233)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Owen Watt | 41 | Head | Millwright | Canada-English |
| 2 | Hilda Watt | 40 | Wife | — | Canada-English |
| 3 | Vivien Watt | 19 | Daughter | — | Canada-English |
| 4 | Francis Watt | 17 | Son | — | Canada-English |
| 5 | Mildred Watt | 14 | Daughter | — | Massachusetts |
| 6 | Freeman Mason | 63 | Head | Trucking | Canada-English |
| 7 | Sarah Mason | 61 | Wife | — | Canada-English |
| 8 | Frank Mason | 33 | Son | Ice Delivery | Massachusetts |
| 9 | Edward Malloy | 66 | Head | Porter | England |
| 10 | Hattie Malloy | 61 | Wife | — | Massachusetts |
| 11 | Joseph Tetreau | 40 | Head | Painter | Massachusetts |
| 12 | Mary Tetreau | 40 | Wife | — | Massachusetts |
| 13 | Frank Walsh | 67 | Head | — | Eire |
| 14 | Bessie Hamilton | 44 | Head | — | Massachusetts |
| 15 | Mildred Randall | 21 | Daughter | Baker | Massachusetts |
| 16 | Leonard Randall | 10 | Grand-son | — | Massachusetts |
| 17 | Patricia Randall | 4 | Grand-daughter | — | Massachusetts |
| 18 | Cecilia Knowles | 51 | Head | — | Newfoundland |
| 19 | William Mccarthy THIS PERSON | 28 | Head | Wrecker | Massachusetts |
| 20 | Ruth Mccarthy | 29 | Wife | — | Maine |
| 21 | Barbara Mccarthy | 7 | Daughter | — | Massachusetts |
| 22 | Allen Kelley | 37 | Head | Mover | Massachusetts |
| 23 | Frances Kelley | 27 | Wife | — | Maine |
| 24 | Dana Kelley | 9 | Son | — | Massachusetts |
| 25 | Ruth Kelley | 8 | Daughter | — | Massachusetts |
| 26 | Jean Kelley | 2 | Daughter | — | Massachusetts |
| 27 | Mary Rankin | 50 | Head | — | England |
| 28 | Arthur Rankin | 23 | Son | Laborer | Maine |
| 29 | Robert Kenyon | 43 | Head | Laborer | Massachusetts |
| 30 | Elsie Kenyon | 34 | Wife | — | Massachusetts |
| 31 | Robert Kenyon | 14 | Son | — | Massachusetts |
| 32 | Dorothy Kenyon | 11 | Daughter | — | Massachusetts |
| 33 | William Kenyon | 1 | Son | — | Massachusetts |
| 34 | Gilbert Silverman | 27 | Head | Laborer | Massachusetts |
| 35 | Martina Silverman | 21 | Wife | — | Massachusetts |
| 36 | Barbara Silverman | 1 | Daughter | — | Massachusetts |
| 37 | Judith Silverman | 0 | Daughter | — | Massachusetts |
| 38 | Clarence Jones | 28 | Head | Truck Driver | Massachusetts |
| 39 | Dolly Jones | 30 | Wife | — | Massachusetts |
| 40 | David Jones | 5 | Son | — | Massachusetts |
Pedigree Summary
William
Gen 1 · 4 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)