MD
Mary Daley — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Daley across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Michael & Michael — first a daughter (b.~1903), then head of a 4-person household.
Age 37
b. ~1903
Female
Daughter
Born: New Hampshire
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Daley |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Clerk |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 39 |
| Income (1939) | 80 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Occupation | Clerk |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1903 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Michael Daley | Head | — | 77 | ~1863 |
| Daniel Daley | Son | — | 30 | ~1910 |
| Mary Daley | Daughter | — | 37 | ~1903 |
| Leonard Daley | Son | — | 27 | ~1913 |
Census Appearances
1920
Worcester, Massachusetts
Daughter, age 22
Worcester, Massachusetts · implied b. ~1898 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Daley |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Ireland |
| Mother's Birthplace | New Hampshire |
| Occupation | housework |
| Industry | private family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1930
Middlesex, Massachusetts
Daughter, age 32
Middlesex, Massachusetts · implied b. ~1898 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Daley |
| Given Name | Mary A |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Maine |
| Occupation | Typist |
| Industry | Insurance Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Middlesex-County, Massachusetts
Daughter, age 37
Middlesex-County, Massachusetts · implied b. ~1903 — 4 household members
| Surname | Daley |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Occupation | Clerk |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 39 |
| Income (1939) | 80 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 Daley across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Michael Daley (~0.92 confidence) and father Michael Daley (~0.92 confidence) and father William Daley (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Daley
b. ~1863
Source father
● Household
· direct · ~0.92
Father
Michael Daley
b. ~1864
Source father
● Household
· direct · ~0.92
Father
William Daley
b. ~1878
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Daley
Daughter · 1940 · age 37 · b. ~1903 · Massachusetts
★ You are viewing this record
Sibling
Leonard Daley
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Daley
Sibling · 1940 · age 30
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
39 people indexed on this census page (nara:1940:m-t0627-01703-00702)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Michael J. Daley | 77 | Head | — | Eire |
| 42 | Mary A. Daley THIS PERSON | 37 | Daughter | Clerk | New Hampshire |
| 43 | Daniel A. Daley | 30 | Son | Clerk | New Hampshire |
| 44 | Leonard W. Daley | 27 | Son | Clerk | New Hampshire |
| 45 | Susan B. Hockett | 50 | Head | Proprietor | Canada English |
| 46 | Michael F. Delaney | 61 | Lodger | Carpenter | Canada English |
| 47 | Alden D. Jolliffe | 43 | Lodger | Inland Ships | Canada English |
| 48 | Alexander Lynch | 53 | Head | Stevedore | Eire |
| 49 | Delia B. Lynch | 39 | Wife | — | Eire |
| 50 | Robert G. Lynch | 20 | Son | — | Massachusetts |
| 51 | Anna L. Lynch | 17 | Daughter | — | Massachusetts |
| 52 | Alexander Jr. Lynch | 16 | Son | — | Massachusetts |
| 53 | Frank J. Burns | 67 | Lodger | — | Eire |
| 54 | John J. Powers | 39 | Lodger | Fisherman | Canada English |
| 55 | Eli T. Dillon | 80 | Head | Trustee | Massachusetts |
| 56 | Minnie H. Dillon | 74 | Wife | — | Colorado |
| 57 | Edith M. Flagg | 31 | Guest | — | Massachusetts |
| 58 | Daniel G. Desmond | 65 | Head | Laborer | Eire |
| 59 | Catherine Desmond | 65 | Wife | — | Eire |
| 60 | Alice M. Galvin | 32 | Daughter | — | New York |
| 61 | Helen M. Desmond | 29 | Daughter | Comptometer Operator | New York |
| 62 | Eileen C. Galvin | 45 | Daughter | — | Massachusetts |
| 63 | Patrick J. Galvin | 38 | Son | Selector Of Orders | Eire |
| 64 | Frances B. Mackiel | 57 | Head | — | Massachusetts |
| 65 | John W. Mackiel | 31 | Son | Chauffeur | Massachusetts |
| 66 | James H. Mackiel | 27 | Son | Salesman Of Orders | Massachusetts |
| 67 | Lawrence P. Mackiel | 21 | Son | Fire Hazard Control | Massachusetts |
| 68 | Francis X. Mackiel | 17 | Son | — | Massachusetts |
| 69 | Alice M. Mackiel | 14 | Daughter | — | Massachusetts |
| 70 | Richard Mackiel | 12 | Son | — | Massachusetts |
| 71 | Aldona F. Mackiel | 29 | Daughter | — | Massachusetts |
| 72 | John Mackiel | 25 | Son | — | Massachusetts |
| 73 | Alfred A. Vessie | 61 | Head | Proprietor | Massachusetts |
| 74 | Sadie G. Vessie | 63 | Wife | — | Massachusetts |
| 75 | John J. Tegins | 39 | Lodger | Radio Operator | New York |
| 76 | Robert H. Gilchrist | 77 | Head | — | Massachusetts |
| 77 | Grace O. Gilchrist | 67 | Wife | — | Massachusetts |
| 78 | Ruth Gilchrist | 35 | Daughter | Private Secretary | Massachusetts |
| 79 | Daniel S. Farnum | 54 | Head | — | Massachusetts |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)