MC
Margaret Casey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Margaret Casey across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 10-person household.
Age 18
b. ~1922
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Casey |
| Given Name | Margaret C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | East Chelmsford |
| Est. Birth Year | ~1922 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Alice Casey | Daughter | — | 12 | ~1928 |
| Elliot Casey | Son | — | 16 | ~1924 |
| Sadie Casey | Spouse | — | 42 | ~1898 |
| John Casey | Son | — | 19 | ~1921 |
| Edwin Casey | Son | — | 14 | ~1926 |
| Ralph Casey | Head | — | 42 | ~1898 |
| Doris Casey | Daughter | — | 3 | ~1937 |
| Richard Casey | Son | — | 8 | ~1932 |
| Margaret Casey | Daughter | — | 18 | ~1922 |
| Esther Casey | Daughter | — | 5 | ~1935 |
Census Appearances
1930
Middlesex, Massachusetts
Daughter, age 7
Middlesex, Massachusetts · implied b. ~1923 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 18
Middlesex-County, Massachusetts · implied b. ~1922 — 10 household members
| Surname | Casey |
| Given Name | Margaret C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Class of Worker | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Massachusetts |
| 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 Margaret Casey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Margaret Casey
Daughter · 1940 · age 18 · b. ~1922 · Massachusetts
★ You are viewing this record
Sibling
Doris Casey
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Casey
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Esther Casey
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edwin Casey
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elliot Casey
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Casey
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Casey
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01603-00810)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marguerite H. Heald | 38 | Wife | Waitress | Maine |
| 2 | Alice E. Heald | 9 | Daughter | — | Massachusetts |
| 3 | Marguerite A. Heald | 5 | Daughter | — | Massachusetts |
| 4 | Mary E. Rooney | 18 | Daughter | Housework | Massachusetts |
| 5 | David A. Rooney | 17 | Stepson | Laborer | Massachusetts |
| 6 | Clare E. Rooney | 14 | Stepdaughter | — | Massachusetts |
| 7 | Edward P. Rooney | 12 | Stepson | — | Massachusetts |
| 8 | Catherine Mcgonagle | 60 | Head | — | New York |
| 9 | George W. Johnson | 76 | Head | — | Massachusetts |
| 10 | Mary C. Doherty | 50 | Head | Winder | Massachusetts |
| 11 | William Doherty | 66 | Lodger | Engineer | Northern Ireland |
| 12 | Hugh Whiteley | 57 | Head | — | England |
| 13 | Mary A. Whiteley | 73 | Sister | — | England |
| 14 | Frank W. Santamour | 58 | Head | Stacker | Massachusetts |
| 15 | Orena A. Santamour | 62 | Wife | — | Massachusetts |
| 16 | Eugene L. Woodbury | 58 | Head | Farmer | Vermont |
| 17 | Gilbert E. Woodbury | 67 | Brother | — | Vermont |
| 18 | Orion L. Woodbury | 65 | Brother | Farmer | Vermont |
| 19 | Gladys E. Woodbury | 54 | Sister | — | Vermont |
| 20 | Joseph A. Pierro | 54 | Head | Laborer | Italy |
| 21 | Angelina Pierro | 53 | Wife | — | Italy |
| 22 | Irene Pierro | 30 | Daughter | Folder | Massachusetts |
| 23 | Rocheen Pierro | 22 | Son | Laborer | Massachusetts |
| 24 | Albert Pierro | 20 | Son | Truck Driver | Massachusetts |
| 25 | Stella Pierro | 15 | Daughter | — | Massachusetts |
| 26 | Ralph R. Casey | 42 | Head | Chauffeur | Massachusetts |
| 27 | Sadie J. Casey | 42 | Wife | — | Canada-English |
| 28 | John R. Casey | 19 | Son | Laborer | Massachusetts |
| 29 | Margaret C. Casey THIS PERSON | 18 | Daughter | — | Massachusetts |
| 30 | Elliot S. Casey | 16 | Son | — | Massachusetts |
| 31 | Edwin J. Casey | 14 | Son | — | Massachusetts |
| 32 | Alice M. Casey | 12 | Daughter | — | Massachusetts |
| 33 | Richard R. Casey | 8 | Son | — | Massachusetts |
| 34 | Esther A. Casey | 5 | Daughter | — | Massachusetts |
| 35 | Doris Casey | 3 | Daughter | — | Massachusetts |
| 36 | William A. Newcomb | 66 | Head | — | Canada-English |
| 37 | Mary C. Arnold | 45 | Housekeeper | Housework | Massachusetts |
| 38 | Stanley Wisniewski | 57 | Head | Laster | Poland |
| 39 | Carolina Wisniewski | 52 | Wife | — | Poland |
| 40 | John N. Wisniewski | 31 | Son | Pulling-Over | 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)