JF
James Farrell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this James Farrell across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Farrell |
| Given Name | James M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1925 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Agnes Farrell | Daughter | — | 15 | ~1925 |
| Margaret Farrell | Daughter | — | 20 | ~1920 |
| Mary Farrell | Daughter | — | 21 | ~1919 |
| Helen Farrell | Daughter | — | 18 | ~1922 |
| Alice Farrell | Daughter | — | 13 | ~1927 |
| John Farrell | Head | — | 55 | ~1885 |
| William Farrell | Son | — | 10 | ~1930 |
| John Farrell | Son | — | 17 | ~1923 |
| James Farrell | Son | — | 15 | ~1925 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 6
Middlesex, Massachusetts · implied b. ~1924 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Farrell |
| Given Name | James M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 15
Middlesex-County, Massachusetts · implied b. ~1925 — 9 household members
| Surname | Farrell |
| Given Name | James M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| 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 James Farrell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Farrell
Son · 1940 · age 15 · b. ~1925 · Massachusetts
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Sibling
John Farrell
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Farrell
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Farrell
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Farrell
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Farrell
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Farrell
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Farrell
Sibling · 1940 · age 18
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-t0627-01705-00042)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | B. Carol Anderson | 8 | Granddaughter | — | Massachusetts |
| 2 | Gail Anderson | 5 | Granddaughter | — | Massachusetts |
| 3 | M. Joseph Mackey | 37 | Head | Steamship Clerk | Massachusetts |
| 4 | Francis Mackey | 29 | Brother | Clerk | Massachusetts |
| 5 | William F. Mackey | 24 | Brother | Packer | Massachusetts |
| 6 | Mary E. Mackey | 28 | Sister | Sales Girl | Massachusetts |
| 7 | Joan V. Mackey | 7 | Niece | — | Massachusetts |
| 8 | Annie Mackey | 60 | Mother | — | Newfoundland |
| 9 | John Farrell | 55 | Head | Electrician | Irish Free State |
| 10 | Mary E. Farrell | 21 | Daughter | — | Massachusetts |
| 11 | Margaret A. Farrell | 20 | Daughter | — | Massachusetts |
| 12 | Helen F. Farrell | 18 | Daughter | — | Massachusetts |
| 13 | John J. Farrell | 17 | Son | — | Massachusetts |
| 14 | James M. Farrell THIS PERSON | 15 | Son | — | Massachusetts |
| 15 | Agnes B. Farrell | 15 | Daughter | — | Massachusetts |
| 16 | Alice I. Farrell | 13 | Daughter | — | Massachusetts |
| 17 | William T. Farrell | 10 | Son | — | Massachusetts |
| 18 | Arthur D. Garndison | 60 | Head | Deputy Clerk | Massachusetts |
| 19 | Sarah B. Garndison | 62 | Wife | — | Massachusetts |
| 20 | Mary Mcglinn | 64 | Sister-in-law | — | Massachusetts |
| 21 | Arthur S. Knox | 37 | Head | Recorder | Massachusetts |
| 22 | Marion A. Knox | 48 | Sister | Clerk | Massachusetts |
| 23 | Florence Anthony | 66 | Housekeeper | Housekeeper | Massachusetts |
| 24 | Bruce B. Whitenay | 47 | Head | Mechanic | Canada English |
| 25 | John B. Whitenay | 16 | Son | — | Massachusetts |
| 26 | Frances Whitenay | 15 | Daughter | — | Massachusetts |
| 27 | Duncan A. Mackay | 66 | Head | Owner | Canada English |
| 28 | Annie Mackay | 58 | Wife | — | Canada English |
| 29 | John J. Mcateer | 63 | Head | Janitor | Massachusetts |
| 30 | Martha Mcateer | 57 | Wife | — | Canada English |
| 31 | Charles L. Mcateer | 25 | Son | New Worker | Massachusetts |
| 32 | Joseph S. Mcateer | 21 | Son | Oiler | Massachusetts |
| 33 | John F. Mcateer | 15 | Son | — | Massachusetts |
| 34 | William F. Jr. Callahan | 26 | Head | Driver-Salesman | Massachusetts |
| 35 | Katherine A. Callahan | 27 | Wife | — | Massachusetts |
| 36 | Patrick O'Brien | 69 | Head | — | Irish Free State |
| 37 | Catherine L. O'Brien | 45 | Daughter | — | Massachusetts |
| 38 | Helen V. O'Brien | 42 | Daughter | Clerk Office | Massachusetts |
| 39 | Leonard Bedford | 34 | Head | Teller | England |
| 40 | Nora K. Bedford | 33 | Wife | — | Canada English |
Related Census Records
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)