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William Reilly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this William Reilly across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 6-person household.
Age 13
b. ~1927
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Reilly |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1927 |
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 |
|---|---|---|---|---|
| Charles Reilly | Son | — | 16 | ~1924 |
| Anna Reilly | Daughter | — | 18 | ~1922 |
| Anna Reilly | Spouse | — | 42 | ~1898 |
| Mary Reilly | Daughter | — | 20 | ~1920 |
| William Reilly | Son | — | 13 | ~1927 |
| William Reilly | Head | — | 49 | ~1891 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 3
Suffolk, Massachusetts · implied b. ~1927 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Reilly |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| 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 13
Suffolk-County, Massachusetts · implied b. ~1927 — 6 household members
| Surname | Reilly |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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 Reilly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Reilly
Son · 1940 · age 13 · b. ~1927 · Massachusetts
★ You are viewing this record
Sibling
Anna Reilly
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Reilly
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Reilly
Sibling · 1940 · age 20
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
40 people indexed on this census page (nara:1940:m-t0627-01659-00291)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Joyce | 40 | Head | — | Newfoundland |
| 2 | Blanche S. Joyce | 40 | Wife | — | Newfoundland |
| 3 | Ruth Butts | 15 | Daughter | — | Massachusetts |
| 4 | William Butts | 15 | Son | — | Massachusetts |
| 5 | Thomas Butts | 12 | Son | — | Massachusetts |
| 6 | Joseph Butts | 11 | Son | — | Massachusetts |
| 7 | Sophie Butts | 11 | Daughter | — | Massachusetts |
| 8 | Harold Butts | 9 | Son | — | Massachusetts |
| 9 | Eugene Butts | 8 | Son | — | Massachusetts |
| 10 | Cecil Butts | 5 | Son | — | Massachusetts |
| 11 | Helen Butts | 2 | Daughter | — | Massachusetts |
| 12 | Margaret Small | 50 | Head | — | Eire |
| 13 | William Small | 22 | Son | None | Massachusetts |
| 14 | James Small | 20 | Son | Laborer | Massachusetts |
| 15 | Anna Small | 17 | Daughter | — | Massachusetts |
| 16 | Patrick Jacobs | 29 | Head | — | Eire |
| 17 | Alice Jacobs | 29 | Wife | — | Eire |
| 18 | Ellen Nash | 56 | Mother | — | Massachusetts |
| 19 | Catherine Barry | 60 | Head | — | Massachusetts |
| 20 | Helen Barry | 27 | Daughter | Stenographer | Massachusetts |
| 21 | Louise Barry | 24 | Daughter | Clerk | Massachusetts |
| 22 | Walter Barry | 20 | Son | None | Massachusetts |
| 23 | Frank Mitchell | 52 | Brother | Senior Clerk | Massachusetts |
| 24 | Neil Leone | 12 | Head | Saleslady | Massachusetts |
| 25 | William Leone | 35 | Son | Clerk | Massachusetts |
| 26 | Gertrude Doherty | 39 | Head | — | Massachusetts |
| 27 | Josephine Doherty | 16 | Daughter | — | Massachusetts |
| 28 | Mary Doherty | 16 | Daughter | — | Massachusetts |
| 29 | Theresa Doherty | 8 | Daughter | — | Massachusetts |
| 30 | William Reilly | 49 | Head | Baggage Master | Massachusetts |
| 31 | Anna Reilly | 42 | Wife | — | Massachusetts |
| 32 | Mary Reilly | 20 | Daughter | New Worker | Massachusetts |
| 33 | Anna Reilly | 18 | Daughter | — | Massachusetts |
| 34 | Charles Reilly | 16 | Son | — | Massachusetts |
| 35 | William Reilly THIS PERSON | 13 | Son | — | Massachusetts |
| 36 | Margaret Doherty | 36 | Head | Salesgirl | Massachusetts |
| 37 | Arthur Doherty | 34 | Brother | Chauffeur | Massachusetts |
| 38 | Thomas Duffy | 43 | Head | Laborer | Massachusetts |
| 39 | Loretta Duffy | 39 | Sister | Movie Operator | Massachusetts |
| 40 | George Lord | 28 | Head | Machinist | 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)