WD
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.~1925), then head of a 6-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Dempsey |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | H 2 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Robert Dempsey | Son | — | 10 | ~1930 |
| William Dempsey | Head | — | 46 | ~1894 |
| Eleanor Quinn | Other | — | 19 | ~1921 |
| Irene Dempsey | Spouse | — | 43 | ~1897 |
| John Dempsey | Son | — | 14 | ~1926 |
| William Dempsey | Son | — | 15 | ~1925 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 5
Suffolk, Massachusetts · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Dempsey |
| Given Name | William Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 15
Suffolk-County, Massachusetts · implied b. ~1925 — 6 household members
| Surname | Dempsey |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Highest Grade | H 2 |
| 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 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 15 · b. ~1925 · Massachusetts
★ You are viewing this record
Sibling
Robert Dempsey
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Dempsey
Sibling · 1940 · age 14
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-t0627-01675-00749)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gerald F. Keenan | 33 | Head | Fireman | Massachusetts |
| 2 | Henrietta Keenan | 26 | Wife | — | Massachusetts |
| 3 | Arthur F. Blake | 34 | Head | Truckman | Massachusetts |
| 4 | Elizabeth Blake | 32 | Wife | — | Massachusetts |
| 5 | Barbara Blake | 7 | Daughter | — | Massachusetts |
| 6 | Dorathea Blake | 4 | Daughter | — | Massachusetts |
| 7 | John Swift | 54 | Head | Bus Driver | Eire |
| 8 | Ellen Swift | 43 | Wife | — | Massachusetts |
| 9 | Charlotte Swift | 21 | Daughter | Clerk | Massachusetts |
| 10 | Barbara Swift | 18 | Daughter | Typewriter | Massachusetts |
| 11 | Margaret Swift | 16 | Daughter | — | Massachusetts |
| 12 | Robert Swift | 14 | Son | — | Massachusetts |
| 13 | Marion Swift | 12 | Daughter | — | Massachusetts |
| 14 | Ellen M. Swift | 9 | Daughter | — | Massachusetts |
| 15 | Margaret M. Martile | 51 | Head | — | Massachusetts |
| 16 | Joseph A. Martile | 37 | Brother | Laborer | Massachusetts |
| 17 | Gertrude E. Ford | 40 | Sister | — | Massachusetts |
| 18 | Arthur W. Ford | 20 | Nephew | — | Massachusetts |
| 19 | Mary M. Ford | 18 | Niece | Clerical | Rhode Island |
| 20 | Percy Lantz | 64 | Head | Ticket Agent | Massachusetts |
| 21 | Alice M. Lantz | 65 | Wife | — | England |
| 22 | William G. Dempsey | 46 | Head | Salesman | Massachusetts |
| 23 | Irene Dempsey | 43 | Wife | — | Massachusetts |
| 24 | William Dempsey THIS PERSON | 15 | Son | — | Massachusetts |
| 25 | John Dempsey | 14 | Son | — | Massachusetts |
| 26 | Robert Dempsey | 10 | Son | — | Massachusetts |
| 27 | Eleanor Quinn | 19 | Lodger | Clerical | Massachusetts |
| 28 | John J. Libbey | 44 | Head | Custodian | Massachusetts |
| 29 | Catherine T. Libbey | 44 | Wife | — | Massachusetts |
| 30 | Mary F. Libbey | 15 | Daughter | — | Massachusetts |
| 31 | John H. Libbey | 14 | Son | — | Massachusetts |
| 32 | Ruth C. Libbey | 10 | Daughter | — | Massachusetts |
| 33 | Joseph E. Libbey | 9 | Son | — | Massachusetts |
| 34 | Nellie G. Libbey | 8 | Daughter | — | Massachusetts |
| 35 | Catherine T. Libbey | 4 | Daughter | — | Massachusetts |
| 36 | Thomas L. Dolan | 36 | Brother-in-law | Attorney | Massachusetts |
| 37 | James F. Dolan | 41 | Brother-in-law | Salesman | Massachusetts |
| 38 | Marie Cassidy | 35 | Head | — | Massachusetts |
| 39 | Keith Cassidy | 6 | 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)