JC
James Crowley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Plymouth-County, Massachusetts
Our Model Tree links this James Crowley across the 1930 and 1940 US Censuses in Plymouth-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 7-person household.
Age 17
b. ~1923
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Plymouth-County, Massachusetts |
| Surname | Crowley |
| Given Name | James F. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Rockland |
| 1935 Residence (County) | Plymouth |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Rockland |
| Est. Birth Year | ~1923 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| John Crowley | Son | — | 14 | ~1926 |
| Robert Crowley | Son | — | 11 | ~1929 |
| James Crowley | Head | — | 58 | ~1882 |
| Thomas Crowley | Son | — | 12 | ~1928 |
| Florence Crowley | Spouse | — | 34 | ~1906 |
| Joseph Crowley | Son | — | 16 | ~1924 |
| James Crowley | Son | — | 17 | ~1923 |
Census Appearances
1930
Plymouth, Massachusetts
Son, age 7
Plymouth, Massachusetts · implied b. ~1923 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crowley |
| Given Name | James F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Plymouth-County, Massachusetts
Son, age 17
Plymouth-County, Massachusetts · implied b. ~1923 — 7 household members
| Surname | Crowley |
| Given Name | James F. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Rockland |
| 1935 Residence (County) | Plymouth |
| Industry | 0 |
| 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 17 · b. ~1923 · Massachusetts
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Sibling
Joseph Crowley
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Crowley
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Crowley
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Crowley
Sibling · 1940 · age 11
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 — Plymouth-County, Massachusetts
Open full size
1940 US Federal Census — Plymouth-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01640-00020)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Annie Ignatowicz | 21 | Daughter | Floor Lady | Massachusetts |
| 2 | Joseph Ignatowicz | 19 | Son | Heater | Massachusetts |
| 3 | Mary Ignatowicz | 18 | Daughter | Sorter | Massachusetts |
| 4 | Benedict Smith | 51 | Head | Floor Worker | Poland |
| 5 | Sophie Smith | 49 | Wife | — | Poland |
| 6 | Ethel Smith | 21 | Daughter | Stitcher | Connecticut |
| 7 | Alfred John Freewold | 33 | Head | Chauffeur | Massachusetts |
| 8 | Margaret Freewold | 32 | Wife | — | Massachusetts |
| 9 | Alfred Jr. Freewold | 11 | Son | — | Massachusetts |
| 10 | Carol Freewold | 5 | Daughter | — | Massachusetts |
| 11 | William Bell | 45 | Head | Highway Surveyor | Massachusetts |
| 12 | Myrtle Bell | 44 | Wife | Stitcher | Massachusetts |
| 13 | Michael Sparta | 34 | Lodger | Shipper | Massachusetts |
| 14 | William Sparta | 12 | Lodger | — | Massachusetts |
| 15 | Earl C. Dammy | 48 | Head | Mechanic | Massachusetts |
| 16 | Bertha Dammy | 52 | Wife | — | Massachusetts |
| 17 | Robert Hayden | 34 | Head | Proprietor | Massachusetts |
| 18 | Annie Hayden | 32 | Wife | — | Vermont |
| 19 | Robert F. Hayden | 8 | Son | — | Massachusetts |
| 20 | David Hayden | 4 | Son | — | Massachusetts |
| 21 | James Hayden | 3 | Son | — | Massachusetts |
| 22 | William Hayden | 1 | Son | — | Massachusetts |
| 23 | Margaret Hayden | 1 | Daughter | — | Massachusetts |
| 24 | Mary Angie | 56 | Head | — | Italy |
| 25 | William Angie | 21 | Son | Service Man | Massachusetts |
| 26 | John Angie | 18 | Son | — | Massachusetts |
| 27 | Norma Angie | 16 | Daughter | 4 | Massachusetts |
| 28 | James F. Crowley | 58 | Head | 400 | Massachusetts |
| 29 | Florence Crowley | 34 | Wife | — | Massachusetts |
| 30 | James F. Jr. Crowley THIS PERSON | 17 | Son | — | Massachusetts |
| 31 | Joseph G. Crowley | 16 | Son | — | Massachusetts |
| 32 | John Crowley | 14 | Son | — | Massachusetts |
| 33 | Thomas Crowley | 12 | Son | — | Massachusetts |
| 34 | Robert Crowley | 11 | Son | — | Massachusetts |
| 35 | Herbert W. Hunt | 70 | Head | — | Massachusetts |
| 36 | Helen Hunt | 68 | Wife | — | Massachusetts |
| 37 | M. Alice Hunt | 85 | Sister | — | Massachusetts |
| 38 | Alexander Ellery | 71 | Head | Owner | Massachusetts |
| 39 | Mary Ellery | 70 | Wife | — | Massachusetts |
| 40 | Lillian Conway | 37 | Daughter | Stitcher | 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)