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William Dempsey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this William Dempsey across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1910), then head of a 5-person household.
Age 30
b. ~1910
Male
Son
Born: Massachusetts
Divorced
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Dempsey |
| Given Name | William D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Divorced |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Counter Man |
| Industry | Restaurant |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Counter Man |
| Township / Ward | Boston |
| Est. Birth Year | ~1910 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Dempsey | Son | — | 30 | ~1910 |
| Jeannette Dempsey | Spouse | — | 60 | ~1880 |
| Francis Dempsey | Son | — | 28 | ~1912 |
| Malcolm Dempsey | Son | — | 12 | ~1928 |
| William Dempsey | Head | — | 63 | ~1877 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 20
Suffolk, Massachusetts · implied b. ~1910 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | William D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada-English |
| Occupation | Engineer |
| Industry | Elec. Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 30
Suffolk-County, Massachusetts · implied b. ~1910 — 5 household members
| Surname | Dempsey |
| Given Name | William D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Divorced |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Counter Man |
| Industry | Restaurant |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 500 |
| Highest Grade | Hs 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 William Dempsey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Dempsey
Son · 1940 · age 30 · b. ~1910 · Massachusetts
★ You are viewing this record
Sibling
Francis Dempsey
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Malcolm Dempsey
Sibling · 1940 · age 12
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-t0627-01676-00134)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dennis Corcoran | 66 | Head | Conductor | Southern Ireland |
| 2 | George D. Corcoran | 62 | Brother | Brakeman | Southern Ireland |
| 3 | Daniel F. Corcoran | 59 | Brother | Checker | Southern Ireland |
| 4 | Mary Corcoran | 51 | Sister-in-law | — | Massachusetts |
| 5 | William P. Dempsey | 63 | Head | Police Officer | Massachusetts |
| 6 | Jeannette Dempsey | 60 | Wife | — | Massachusetts |
| 7 | William D. Dempsey THIS PERSON | 30 | Son | Counter Man | Massachusetts |
| 8 | Francis Dempsey | 28 | Son | Salesman | Massachusetts |
| 9 | Malcolm Dempsey | 12 | Son | — | Massachusetts |
| 10 | William J. White | 51 | Head | Gate-Man | Southern Ireland |
| 11 | Delia White | 52 | Wife | — | Southern Ireland |
| 12 | Mary White | 22 | Daughter | Service Operator | Massachusetts |
| 13 | Margaret White | 21 | Daughter | Salesgirl | Massachusetts |
| 14 | John White | 17 | Son | — | Massachusetts |
| 15 | William White | 15 | Son | — | Massachusetts |
| 16 | Theresa White | 12 | Daughter | — | Massachusetts |
| 17 | Francis White | 5 | Son | — | Massachusetts |
| 18 | Thomas Carroll | 50 | Lodger | Inspector | Southern Ireland |
| 19 | Timothy J. Shay | 71 | Head | Receiving Clerk | England |
| 20 | Mary Shay | 53 | Wife | — | Massachusetts |
| 21 | John F. Kelly | 54 | Head | Accountant | Massachusetts |
| 22 | Catherine Kelly | 47 | Wife | — | Massachusetts |
| 23 | John F. Jr. Kelly | 22 | Son | Clerk | Massachusetts |
| 24 | Paul M. Kelly | 15 | Son | — | Massachusetts |
| 25 | William E. Kelly | 11 | Son | — | Massachusetts |
| 26 | Charles J. Blessington | 50 | Head | Plumber | Massachusetts |
| 27 | Mary D. Blessington | 50 | Wife | — | Massachusetts |
| 28 | Rita Blessington | 17 | Daughter | — | Massachusetts |
| 29 | Robert C. Welch | 43 | Head | Pipe-Fitter | Massachusetts |
| 30 | Louise A. Welch | 48 | Wife | — | Massachusetts |
| 31 | Francis T. Welch | 22 | Son | Boiler-Maker Helper | Massachusetts |
| 32 | Robert E. Welch | 18 | Son | — | Massachusetts |
| 33 | Lorraine L. Welch | 14 | Daughter | — | Massachusetts |
| 34 | Carlton J. Welch | 10 | Son | — | Massachusetts |
| 35 | William Campbell | 50 | Head | Shipper | Massachusetts |
| 36 | Anna Campbell | 48 | Wife | — | Massachusetts |
| 37 | James Campbell | 23 | Son | Clerk | Massachusetts |
| 38 | Louise Campbell | 19 | Daughter | — | Massachusetts |
| 39 | William Campbell | 17 | Son | — | 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)