MC
Mary Coyle — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Coyle across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Coyle |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Librarian |
| Industry | Library |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Librarian |
| Township / Ward | Boston City |
| Est. Birth Year | ~1917 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Beatrice Coyle | Daughter | — | 19 | ~1921 |
| Elizabeth Coyle | Spouse | — | 56 | ~1884 |
| Mary Coyle | Daughter | — | 23 | ~1917 |
| Cornelius Coyle | Son | — | 15 | ~1925 |
| Rose Coyle | Daughter | — | 18 | ~1922 |
| Elizabeth Coyle | Daughter | — | 18 | ~1922 |
| Edward Coyle | Head | — | 56 | ~1884 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 13
Suffolk, Massachusetts · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coyle |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | Northern Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 7 household members
| Surname | Coyle |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Occupation | Librarian |
| Industry | Library |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 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 Mary Coyle across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Coyle
Daughter · 1940 · age 23 · b. ~1917 · Massachusetts
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Sibling
Cornelius Coyle
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Coyle
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Coyle
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Beatrice Coyle
Sibling · 1940 · age 19
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-t0627-01659-00285)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward C. Coyle | 56 | Head | Laborer | Eire |
| 2 | Elizabeth Coyle | 56 | Wife | — | Eire |
| 3 | Mary Coyle THIS PERSON | 23 | Daughter | Librarian | Massachusetts |
| 4 | Beatrice Coyle | 19 | Daughter | Attendant | Massachusetts |
| 5 | Rose Coyle | 18 | Daughter | Attendant | Massachusetts |
| 6 | Elizabeth Coyle | 18 | Daughter | — | Massachusetts |
| 7 | Cornelius Coyle | 15 | Son | — | Massachusetts |
| 8 | Thomas F. Morris | 28 | Head | Apprentice | Massachusetts |
| 9 | Catherine M. Morris | 26 | Wife | Cleaner | Massachusetts |
| 10 | Thomas F. Jr. Morris | 5 | Son | — | Massachusetts |
| 11 | Richard M. Morris | 4 | Son | — | Massachusetts |
| 12 | Margaret O'Malley | 69 | Head | — | Eire |
| 13 | Frank Stewart | 24 | Head | Lineman | Massachusetts |
| 14 | Agnes Stewart | 22 | Wife | — | Massachusetts |
| 15 | Paul Stewart | 3 | Son | — | Massachusetts |
| 16 | Agnes Stewart | 1 | Daughter | — | Massachusetts |
| 17 | Thomas Annum | 38 | Head | Glazier | Massachusetts |
| 18 | Lillian B. Annum | 32 | Wife | — | Massachusetts |
| 19 | William F. Coaty | 34 | Head | Freight Handler | Massachusetts |
| 20 | John Coaty | 29 | Brother | Longshoreman | Massachusetts |
| 21 | James Coaty | 21 | Brother | Warehouseman | Massachusetts |
| 22 | Margaret Coaty | 18 | Sister | — | Massachusetts |
| 23 | Roger D. Saccardo | 26 | Head | Sub-Clerk | Massachusetts |
| 24 | Ann M. Saccardo | 23 | Wife | Asst. Supervisor | Pennsylvania |
| 25 | Balthazar Michalski | 31 | Head | — | Maine |
| 26 | Leonard Michalski | 7 | Son | — | Massachusetts |
| 27 | Edward Michalski | 5 | Son | — | Massachusetts |
| 28 | Joan Michalski | 3 | Daughter | — | Massachusetts |
| 29 | Dorothy Michalski | 2 | Daughter | — | Massachusetts |
| 30 | Angello Gregorio | 23 | Head | Laborer | Italy |
| 31 | Nancy Gregorio | 26 | Wife | — | Italy |
| 32 | John H. Durham | 61 | Head | — | Massachusetts |
| 33 | Josephine Durham | 59 | Wife | — | Massachusetts |
| 34 | Madeline Durham | 30 | Daughter | Cutter | Massachusetts |
| 35 | Mary Durham | 21 | Daughter | Stitcher | Massachusetts |
| 36 | Catherine T. Hess | 38 | Head | — | Massachusetts |
| 37 | Hilda C. Hess | 15 | Daughter | — | Massachusetts |
| 38 | Catherine Scannell | 64 | Head | — | Eire |
| 39 | Dennis Scannell | 25 | Son | Welder | Massachusetts |
| 40 | Dennis Jr. Scannell | 0 | Grandson | — | 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)