JC
James Crowley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this James Crowley across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1907), then head of a 8-person household.
Age 33
b. ~1907
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Crowley |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Handler |
| Industry | Leather house |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 496 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Handler |
| Township / Ward | Boston |
| Est. Birth Year | ~1907 |
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 |
|---|---|---|---|---|
| Mary Molloy | Daughter | — | 10 | ~1930 |
| Julia Crowley | Other | — | 78 | ~1862 |
| Virginia Molloy | Daughter | — | 13 | ~1927 |
| John Crowley | Son | — | 32 | ~1908 |
| John Molloy | Son | — | 5 | ~1935 |
| Jenny Molloy | Spouse | — | 34 | ~1906 |
| James Crowley | Son | — | 33 | ~1907 |
| Harold Molloy | Head | — | 38 | ~1902 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 23
Suffolk, Massachusetts · implied b. ~1907 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | James H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 33
Suffolk-County, Massachusetts · implied b. ~1907 — 8 household members
| Surname | Crowley |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Handler |
| Industry | Leather house |
| Class of Worker | PW |
| Hours Worked | 12 |
| Income (1939) | 496 |
| Highest Grade | H-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 James Crowley across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Crowley
Son · 1940 · age 33 · b. ~1907 · Massachusetts
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Sibling
John Crowley
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Molloy
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Molloy
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Molloy
Sibling · 1940 · age 10
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01664-00201)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Trippoli | 34 | Wife | — | Italy |
| 42 | Leo Trippoli | 15 | Son | — | Massachusetts |
| 43 | John Salvatore | 45 | Lodger | Laborer | Italy |
| 44 | Bridget Wallace | 57 | Head | — | Eire |
| 45 | Joseph Wallace | 27 | Son | Laborer | Massachusetts |
| 46 | Thomas Wallace | 25 | Son | Laborer | Massachusetts |
| 47 | Elizabeth Donahue | 43 | Head | Trucker | Canada English |
| 48 | Ronald Mccafferty | 23 | Nephew | Mechanic | Canada English |
| 49 | Catherine Mccafferty | 20 | Niece | — | Canada English |
| 50 | Mary Reilly | 52 | Head | — | Massachusetts |
| 51 | Thomas Reilly | 28 | Son | Chauffeur | Massachusetts |
| 52 | Clara Reilly | 15 | Daughter | — | Massachusetts |
| 53 | Edward Reilly | 14 | Son | — | Massachusetts |
| 55 | William Jamison | 34 | Head | Laborer | Virginia |
| 56 | Dorothy Jamison | 31 | Wife | — | Massachusetts |
| 57 | William Jr. Jamison | 4 | Son | — | Massachusetts |
| 58 | John J. Milkevich | 35 | Head | Sells Meat | Lithuania |
| 59 | Sally Milkevich | 25 | Wife | — | Massachusetts |
| 60 | Barbara Milkevich | 8 | Daughter | — | Massachusetts |
| 61 | Geraldine Milkevich | 6 | Daughter | — | Massachusetts |
| 62 | Robert Milkevich | 8 | Son | — | Massachusetts |
| 63 | Dominic Crear | 32 | Head | Stationary Engineer | Massachusetts |
| 64 | Marjorie Crear | 30 | Wife | — | Massachusetts |
| 65 | Philip Crear | 9 | Son | — | Massachusetts |
| 66 | John Crear | 8 | Son | — | Massachusetts |
| 67 | James Sferrazza | 32 | Head | Machinist | Massachusetts |
| 68 | Mary Sferrazza | 34 | Wife | — | Massachusetts |
| 69 | Rose M. Sferrazza | 8 | Daughter | — | Massachusetts |
| 70 | Paul Sferrazza | 6 | Son | — | Massachusetts |
| 71 | James Sferrazza | 4 | Son | — | Massachusetts |
| 72 | John Sferrazza | 2 | Son | — | Massachusetts |
| 73 | Harold Molloy | 38 | Head | — | Massachusetts |
| 74 | Jenny Molloy | 34 | Wife | — | Massachusetts |
| 75 | Virginia Molloy | 13 | Daughter | — | Massachusetts |
| 76 | Mary E. Molloy | 10 | Daughter | — | Massachusetts |
| 77 | John Molloy | 5 | Son | — | Massachusetts |
| 78 | Julia Crowley | 78 | Boarder | — | Eire |
| 79 | James Crowley THIS PERSON | 33 | Son | Handler | Massachusetts |
| 80 | John Crowley | 32 | Son | Sponger | Massachusetts |
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)