WM
William Mccarthy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this William Mccarthy across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents William & Catherine — first a head (b.~1904), then head of a 7-person household.
Age 36
b. ~1904
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | McCarthy |
| Given Name | William A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Fuel Oil |
| Class of Worker | PW |
| Hours Worked | 25 |
| Income (1939) | 1170 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Truck Driver |
| Township / Ward | Malden City |
| Est. Birth Year | ~1904 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Joan Mccarthy | Daughter | — | 7 | ~1933 |
| Doris Mccarthy | Daughter | — | 4 | ~1936 |
| Barbara Mccarthy | Daughter | — | 9 | ~1931 |
| William Mccarthy | Head | — | 36 | ~1904 |
| Robert Mccarthy | Son | — | 5 | ~1935 |
| Richard Mccarthy | Son | — | 1 | ~1939 |
| Elizabeth Mccarthy | Spouse | — | 33 | ~1907 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 16
Middlesex, Massachusetts · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Candy Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 26
Middlesex, Massachusetts · implied b. ~1904 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Telephone |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 36
Middlesex-County, Massachusetts · implied b. ~1904 — 7 household members
| Surname | McCarthy |
| Given Name | William A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Occupation | Truck Driver |
| Industry | Fuel Oil |
| Class of Worker | PW |
| Hours Worked | 25 |
| Income (1939) | 1170 |
| 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 Mccarthy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Mccarthy (~0.92 confidence) and mother Catherine Mccarthy (~0.92 confidence) and mother Mary Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Mccarthy
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Catherine Mccarthy
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Mary Mccarthy
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mccarthy
Head · 1940 · age 36 · b. ~1904 · 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 — 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-t0627-01609-00178)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lillian Lancaster | 47 | Wife | — | Massachusetts |
| 42 | John Lancaster | 22 | Son | Labor | Massachusetts |
| 43 | Grace Lancaster | 20 | Daughter | — | Massachusetts |
| 44 | Charles Lancaster | 18 | Son | — | Massachusetts |
| 45 | Gertrude Lancaster | 16 | Daughter | — | Massachusetts |
| 46 | Marie Lancaster | 12 | Daughter | — | Massachusetts |
| 48 | Thomas Murphy | 66 | Head | Blower | New Jersey |
| 49 | Nella F. Murphy | 49 | Wife | — | Massachusetts |
| 50 | Harry Philbrook | 58 | Head | Superintendent | Massachusetts |
| 51 | Lulu M. Philbrook | 54 | Wife | — | England |
| 52 | Ernest Reavey | 68 | Head | Supply Clerk | England |
| 53 | Maude Reavey | 62 | Wife | — | Massachusetts |
| 54 | Ernest Jr. Reavey | 30 | Son | Delivery Man | Massachusetts |
| 55 | Lillian Bowie | 37 | Head | Nurse | Maine |
| 56 | Joan M. Bowie | 6 | Daughter | — | Massachusetts |
| 57 | Annie Koubay | 55 | Mother | — | Maine |
| 58 | Raymond Powell | 22 | Son-in-law | Laborer | Massachusetts |
| 59 | Doris Powell | 22 | Wife | Technician | Maine |
| 60 | Alice M. Cooper | 65 | Head | — | Massachusetts |
| 61 | Arthur E. Cooper | 36 | Son | Truck Driver | Massachusetts |
| 62 | Mary E. Drown | 83 | Head | — | Massachusetts |
| 63 | Albina Bellerose | 40 | Lodger | Seamstress | England |
| 64 | Ruby Doane | 30 | Lodger | Seamstress | England |
| 65 | Peter Rollston | 59 | Head | — | Massachusetts |
| 66 | Charlotte Rollston | 59 | Wife | — | Newfoundland |
| 67 | John Rollston | 28 | Son | Painter | Massachusetts |
| 68 | Lillian Rollston | 23 | Daughter-in-law | — | Newfoundland |
| 69 | Lillian F. Rollston | 2 | Daughter | — | Massachusetts |
| 70 | William A. Mccarthy THIS PERSON | 36 | Head | Truck Driver | Massachusetts |
| 71 | Elizabeth Mccarthy | 33 | Wife | — | New York |
| 72 | Barbara J. Mccarthy | 9 | Daughter | — | Massachusetts |
| 73 | Joan A. Mccarthy | 7 | Daughter | — | Massachusetts |
| 74 | Robert F. Mccarthy | 5 | Son | — | Massachusetts |
| 75 | Doris M. Mccarthy | 4 | Daughter | — | Massachusetts |
| 76 | Richard A. Mccarthy | 1 | Son | — | Massachusetts |
| 77 | Macinis Puzack | 46 | Head | Proprietor | Poland |
| 78 | Rebecca Puzack | 36 | Wife | — | Poland |
| 79 | Helen Puzack | 16 | Daughter | — | Massachusetts |
| 80 | Muriel Puzack | 9 | Daughter | — | Massachusetts |
Pedigree Summary
William
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)