JM
James Mccarthy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this James Mccarthy across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1899), then head of a 8-person household.
Age 41
b. ~1899
Male
Head
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | McCarthy |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Laborer |
| Industry | Soap Factory |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1560 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
| Occupation | Laborer |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1899 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Mccarthy | Daughter | — | 1 | ~1939 |
| Beatrice Mccarthy | Daughter | — | 7 | ~1933 |
| James Mccarthy | Head | — | 41 | ~1899 |
| Robert Mccarthy | Son | — | 3 | ~1937 |
| James Mccarthy | Son | — | 4 | ~1936 |
| Michael Mccarthy | Son | — | 6 | ~1934 |
| Charles Mccarthy | Son | — | 8 | ~1932 |
| Beatrice Mccarthy | Spouse | — | 35 | ~1905 |
Census Appearances
1930
Suffolk, Massachusetts
Head, age 32
Suffolk, Massachusetts · implied b. ~1898 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Naturalized |
| Year of Immigration | 1911 |
| Age at First Marriage | 30 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Laborer |
| Industry | Ship Yards |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 16 |
| Veteran | No |
| Birthplace (normalized) | irish free state |
1940
Middlesex-County, Massachusetts
Head, age 41
Middlesex-County, Massachusetts · implied b. ~1899 — 8 household members
| Surname | McCarthy |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Naturalization Status | Naturalized |
| Occupation | Laborer |
| Industry | Soap Factory |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1560 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
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 James Mccarthy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
James Mccarthy
Head · 1940 · age 41 · b. ~1899 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Middlesex-County, Massachusetts
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1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01704-00285)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert Paterson | 20 | Head | Usher | Massachusetts |
| 42 | Evelyn Paterson | 17 | Wife | — | Massachusetts |
| 43 | Alexander Kirton | 54 | Head | Carpenter | Scotland |
| 44 | Catherine Kirton | 55 | Wife | — | Scotland |
| 45 | John B. Kirton | 24 | Son | Checker | Massachusetts |
| 46 | Ruth E. Kirton | 21 | Daughter | — | Massachusetts |
| 47 | Nora Scanlon | 66 | Head | — | Irish Free State |
| 48 | John F. Scanlon | 38 | Son | Clerk | Massachusetts |
| 49 | Mary J. Scanlon | 36 | Daughter | Operator | Massachusetts |
| 50 | Edward L. Scanlon | 34 | Son | Mechanic | Massachusetts |
| 51 | Walter J. Scanlon | 26 | Son | Electric Ground | Massachusetts |
| 52 | James Mccarthy THIS PERSON | 41 | Head | Laborer | Irish Free State |
| 53 | Beatrice A. Mccarthy | 35 | Wife | — | Irish Free State |
| 54 | Charles J. Mccarthy | 8 | Son | — | Massachusetts |
| 55 | Beatrice T. Mccarthy | 7 | Daughter | — | Massachusetts |
| 56 | Michael J. Mccarthy | 6 | Son | — | Massachusetts |
| 57 | James F. Mccarthy | 4 | Son | — | Massachusetts |
| 58 | Robert B. Mccarthy | 3 | Son | — | Massachusetts |
| 59 | Dorothy A. Mccarthy | 1 | Daughter | — | Massachusetts |
| 60 | Jeremiah Leary | 61 | Head | Shipper | Irish Free State |
| 61 | Catherine Leary | 58 | Wife | Counter | Massachusetts |
| 62 | Arthur H. Leary | 33 | Son | Counter | Massachusetts |
| 63 | John J. Leary | 26 | Son | General Work | Massachusetts |
| 64 | Gertrude L. Leary | 23 | Daughter | Packer | Massachusetts |
| 65 | Mary Mclaughlin | 9 | Niece | — | Massachusetts |
| 66 | Lawrence J. Burns | 31 | Head | Chauffeur | Massachusetts |
| 67 | Mary C. Burns | 30 | Wife | — | Massachusetts |
| 68 | Lawrence J. Jr. Burns | 4 | Son | — | Massachusetts |
| 69 | Claire Burns | 1 | Daughter | — | Massachusetts |
| 70 | James J. Waters | 69 | Head | — | Irish Free State |
| 71 | Delia Waters | 65 | Wife | — | Irish Free State |
| 72 | James P. Waters | 36 | Son | Printer | Massachusetts |
| 73 | Helen C. Waters | 33 | Daughter | Secretary | Massachusetts |
| 74 | Joseph J. Waters | 29 | Son | Porter | Massachusetts |
| 75 | Anne E. Waters | 27 | Daughter | Teacher | Massachusetts |
| 76 | Loretta A. Waters | 21 | Daughter | — | Massachusetts |
| 77 | Herbert G. Jr. Weber | 26 | Head | Special Delivery | Massachusetts |
| 78 | Mary J. Weber | 28 | Wife | — | Massachusetts |
| 79 | Herbert G. 3Rd Weber | 2 | Son | — | Massachusetts |
| 80 | Luigi Borelli | 43 | Head | Cabinet Maker | Italy |
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)