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James Crosby — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this James Crosby across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1908), then head of a 5-person household.
Age 32
b. ~1908
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Crosby |
| Given Name | James J. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Cambridge |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Asst. Baker |
| Industry | Baking |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Asst. Baker |
| Township / Ward | Cambridge |
| Est. Birth Year | ~1908 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| John Crosby | Son | — | 26 | ~1914 |
| James Crosby | Son | — | 32 | ~1908 |
| William Crosby | Son | — | 24 | ~1916 |
| James Crosby | Head | — | 64 | ~1876 |
| Anna Crosby | Spouse | — | 54 | ~1886 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 20
Middlesex, Massachusetts · implied b. ~1910 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crosby |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Laborer |
| Industry | Rubber Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 32
Middlesex-County, Massachusetts · implied b. ~1908 — 5 household members
| Surname | Crosby |
| Given Name | James J. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Cambridge |
| 1935 Residence (County) | Middlesex |
| Occupation | Asst. Baker |
| Industry | Baking |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | C 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 Crosby across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Crosby
Son · 1940 · age 32 · b. ~1908 · Massachusetts
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Sibling
William Crosby
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Crosby
Sibling · 1940 · age 26
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
35 people indexed on this census page (nara:1940:m-t0627-01683-00783)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James J Crosby | 64 | Head | — | Massachusetts |
| 42 | Anna H Crosby | 54 | Wife | — | Massachusetts |
| 43 | James J. Jr. Crosby THIS PERSON | 32 | Son | Asst. Baker | Massachusetts |
| 44 | John T Crosby | 26 | Son | Salesman | Massachusetts |
| 45 | William H Crosby | 24 | Son | Auditor | Massachusetts |
| 46 | Louisa A Wells | 67 | Head | — | Massachusetts |
| 47 | Elizabeth Thackeray | 59 | Partner | Bank Clerk | Massachusetts |
| 48 | Delia Crosley | 67 | Servant | Domestic Servant | Eire |
| 50 | Mary L. Mosher | 36 | Superior | Supervising Nurse | Canada E |
| 51 | Sara M Berminsky | 26 | Lodger | Technician | Massachusetts |
| 52 | Ruth D Peterson | 27 | Lodger | Trained Nurse | Massachusetts |
| 53 | Margaret R Morrison | 32 | Lodger | Trained Nurse | Canada E |
| 54 | Phyllis L Pullen | 32 | Lodger | Trained Nurse | Canada E |
| 57 | Emma B. Moore | 79 | Head | — | Scotland |
| 58 | Katherine Mcdonald | 65 | Servant | Cook & Housekeeper | Canada E |
| 59 | Agnes G Mcdonald | 53 | Servant | Maid | Canada E |
| 61 | Faraba Halloran | 51 | Head | Radiator Repairer | Turkey |
| 62 | Hagopah Halloran | 46 | Wife | — | Turkey |
| 63 | Harach Halloran | 21 | Son | Radiator Repairing | Massachusetts |
| 64 | Hrant Halloran | 20 | Son | Mechanic'S Helper | Massachusetts |
| 65 | Zevart Halloran | 18 | Girl | New Worker | Massachusetts |
| 66 | Leo Halloran | 13 | Son | — | Massachusetts |
| 67 | John M Mochel | 30 | Head | Telephone Clerk | Oregon |
| 68 | Ellen Mochel | 24 | Wife | Lobbying Machine Operator | Massachusetts |
| 69 | John M. Jr. Mochel | 1 | Son | — | Massachusetts |
| 70 | Mary M Doyle | 34 | Lodger | Manicurist | Massachusetts |
| 71 | James M Austin | 24 | Lodger | — | New Zealand |
| 72 | Pauline H Myerse | 33 | Lodger | — | Texas |
| 73 | Hung Tsang | 19 | Lodger | — | China |
| 74 | John B Berube | 18 | Lodger | Student Work | Canal Zone |
| 75 | Charles E Harrigan | 79 | Head | — | Michigan |
| 76 | Delenah Harrigan | 77 | Wife | — | Canada E |
| 77 | Frank W Harrigan | 47 | Son | Postal Clerk | Indiana |
| 79 | Ella Veniott | 46 | Head | — | Maine |
| 80 | Raj P. Misra | 30 | Lodger | — | India |
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)