MR
Mary Reilly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Reilly across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 6-person household.
Age 16
b. ~1924
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Reilly |
| Given Name | Mary C |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Revere City |
| 1935 Residence (County) | SUFFOLK |
| Additional Details | |
| Occupation | Student |
| Highest Grade | H 3 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Student |
| Township / Ward | Revere City |
| Est. Birth Year | ~1924 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Reilly | Daughter | — | 16 | ~1924 |
| Catherine Reilly | Daughter | — | 6 | ~1934 |
| Elizabeth Reilly | Daughter | — | 8 | ~1932 |
| John Reilly | Head | — | 43 | ~1897 |
| John Reilly | Son | — | 21 | ~1919 |
| Mildred Reilly | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 5
Suffolk, Massachusetts · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Reilly |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 16
Suffolk-County, Massachusetts · implied b. ~1924 — 6 household members
| Surname | Reilly |
| Given Name | Mary C |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Revere City |
| 1935 Residence (County) | SUFFOLK |
| Occupation | Student |
| Highest Grade | H 3 |
| 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 Mary Reilly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Reilly
Daughter · 1940 · age 16 · b. ~1924 · Massachusetts
★ You are viewing this record
Sibling
Catherine Reilly
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Reilly
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Reilly
Sibling · 1940 · age 21
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-t0627-01643-00554)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Helen Page | 10 | daughter | — | Massachusetts |
| 42 | Elizabeth Page | 7 | daughter | — | Massachusetts |
| 43 | Virginia Page | 3 | daughter | — | Massachusetts |
| 44 | William Smith | 50 | Head | Chauffeur | Maryland |
| 45 | Mildred H. Smith | 46 | Wife | — | New York |
| 46 | Monteray Smith | 15 | daughter | Student | Massachusetts |
| 47 | Ernest Dewsnap | 31 | Head | Stock Clerk | Massachusetts |
| 48 | Catherine Dewsnap | 28 | Wife | — | Massachusetts |
| 49 | Ernest R Dewsnap | 9 | Son | — | Massachusetts |
| 50 | Gerald P Dewsnap | 4 | Son | — | Massachusetts |
| 51 | Harold C Peral | 42 | Head | Moving Opp | Rhode Island |
| 52 | Edna E Peral | 43 | Wife | — | N. Hampshire |
| 53 | Pauline M Peral | 20 | daughter | — | N. Hampshire |
| 54 | Leon L Peral | 19 | Son | Clerk | N. Hampshire |
| 55 | Norman H Peral | 18 | Son | Laborer | N. Hampshire |
| 56 | Frank A Sannella | 34 | Head | Clerk | Italy |
| 57 | Winifred Sannella | 28 | Wife | — | Massachusetts |
| 58 | Frank A Sannella | 5 | Son | — | Massachusetts |
| 59 | John A Bernard | 35 | Head | Laborer | Massachusetts |
| 60 | Elizabeth M Bernard | 31 | Wife | — | Massachusetts |
| 61 | Mary E Bernard | 8 | daughter | — | Massachusetts |
| 62 | Elizabeth F Bernard | 7 | daughter | — | Massachusetts |
| 63 | Patricia Bernard | 5 | daughter | — | Massachusetts |
| 64 | Florence M Bernard | 1 | daughter | — | Massachusetts |
| 65 | John I Armstrong | 33 | Head | Clerk | Massachusetts |
| 66 | Emily M Armstrong | 34 | Wife | — | Canada |
| 67 | Joane Armstrong | 8 | daughter | — | Massachusetts |
| 68 | Donald J Armstrong | 5 | Son | — | Massachusetts |
| 69 | Margaret J O'Brien | 73 | Head | — | Massachusetts |
| 70 | Julia A O'Brien | 66 | Sister | — | Massachusetts |
| 71 | Delia E O'Brien | 64 | Sister | — | Massachusetts |
| 72 | Anna G O'Brien | 58 | Sister | — | Massachusetts |
| 73 | Joseph F Blaisdell | 80 | Head | — | Maine |
| 74 | Elizabeth V Blaisdell | 76 | Wife | — | Scotland |
| 75 | John P Reilly | 43 | Head | Foreman | New York |
| 76 | Mildred V Reilly | 39 | Wife | — | Maine |
| 77 | John C Reilly | 21 | Son | General Work | N. Hampshire |
| 78 | Mary C Reilly THIS PERSON | 16 | daughter | Student | Massachusetts |
| 79 | Elizabeth M Reilly | 8 | daughter | — | Massachusetts |
| 80 | Catherine Reilly | 6 | 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)