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Thomas Casey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Thomas Casey across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Casey |
| Given Name | Thomas |
| 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 | Hs 1 |
| 1935 Residence | Same place |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Ellen Casey | Daughter | — | 7 | ~1933 |
| Margaret Casey | Daughter | — | 1 | ~1939 |
| Thomas Casey | Son | — | 15 | ~1925 |
| Frances Casey | Daughter | — | 10 | ~1930 |
| Elizabeth Casey | Daughter | — | 12 | ~1928 |
| Elizabeth Casey | Spouse | — | 38 | ~1902 |
| John Casey | Head | — | 40 | ~1900 |
| Catherine Casey | Daughter | — | 13 | ~1927 |
| Mary Casey | Daughter | — | 14 | ~1926 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 5
Suffolk, Massachusetts · implied b. ~1925 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 15
Suffolk-County, Massachusetts · implied b. ~1925 — 9 household members
| Surname | Casey |
| Given Name | Thomas |
| 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 | Hs 1 |
| 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 Thomas Casey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Casey
Son · 1940 · age 15 · b. ~1925 · Massachusetts
★ You are viewing this record
Sibling
Catherine Casey
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen Casey
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Casey
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Casey
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Casey
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Casey
Sibling · 1940 · age 10
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-t0627-01659-00507)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Michael G Sullivan | 62 | Head | Freight Clerk | Eire |
| 2 | Ellen Sullivan | 67 | Wife | — | Eire |
| 3 | Ellen Sullivan | 35 | Daughter | Operator | Massachusetts |
| 4 | Joan Sullivan | 32 | Daughter | — | Massachusetts |
| 5 | Mary A Sullivan | 30 | Daughter | Operator | Massachusetts |
| 6 | Catherine Sullivan | 28 | Daughter | — | Massachusetts |
| 7 | Rita N Sullivan | 24 | Daughter | File Clerk | Massachusetts |
| 8 | John Casey | 40 | Head | Waterproofer | Eire |
| 9 | Elizabeth Casey | 38 | Wife | — | Eire |
| 10 | Thomas Casey THIS PERSON | 15 | Son | — | Massachusetts |
| 11 | Mary Casey | 14 | Daughter | — | Massachusetts |
| 12 | Catherine Casey | 13 | Daughter | — | Massachusetts |
| 13 | Elizabeth Casey | 12 | Daughter | — | Massachusetts |
| 14 | Frances Casey | 10 | Daughter | — | Massachusetts |
| 15 | Ellen Casey | 7 | Daughter | — | Massachusetts |
| 16 | Margaret Casey | 1 | Daughter | — | Massachusetts |
| 17 | John Doherty | 52 | Head | Sweeper | Massachusetts |
| 18 | Honora Doherty | 49 | Wife | — | Massachusetts |
| 19 | Catherine Doherty | 28 | Daughter | Operator | Massachusetts |
| 20 | William Doherty | 27 | Son | Helper | Massachusetts |
| 21 | John Doherty | 15 | Son | — | Massachusetts |
| 22 | Ruth Doherty | 11 | Daughter | — | Massachusetts |
| 23 | Edward H Carpenter | 35 | Head | Laborer | Massachusetts |
| 24 | Lorretta Carpenter | 28 | Wife | — | Massachusetts |
| 25 | Edward Carpenter | 2 | Son | — | Massachusetts |
| 26 | Mary E Glavin | 70 | Head | — | Newfoundland |
| 27 | Walter J Glavin | 30 | Son | Cooper | Massachusetts |
| 28 | Thomas (Ab) Glavin | 44 | Son | Seaman | Massachusetts |
| 29 | John P (Ab) Glavin | 38 | Son | Seaman | Massachusetts |
| 30 | Edward (Ab) Glavin | 33 | Son | Seaman | Massachusetts |
| 31 | Annie E Allen | 71 | Head | — | Nova Scotia |
| 32 | James A Russell | 49 | Head | — | Massachusetts |
| 33 | Ellen G Russell | 45 | Wife | — | Massachusetts |
| 34 | Walter Sr Clark | 62 | Head | Lumber Worker | Massachusetts |
| 35 | Walter Jr Clark | 20 | Son | — | Massachusetts |
| 36 | Michael Welch | 50 | Head | Helper | Massachusetts |
| 37 | Lillian M Welch | 41 | Wife | — | Massachusetts |
| 38 | Mildred Welch | 17 | Daughter | New Worker | Massachusetts |
| 39 | John Welch | 16 | Son | — | Massachusetts |
| 40 | Lillian Welch | 15 | Daughter | — | 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)