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Mary Clancy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Clancy across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 10-person household.
Age 16
b. ~1924
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Clancy |
| Given Name | Mary K |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Greentree Boro |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Greentree Boro |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anna Clancy | Daughter | — | 8 | ~1932 |
| Patricia Clancy | Daughter | — | 5 | ~1935 |
| Mary Clancy | Daughter | — | 16 | ~1924 |
| Gene Clancy | Daughter | — | 12 | ~1928 |
| Barbara Clancy | Daughter | — | 5 | ~1935 |
| Nora Clancy | Spouse | — | 44 | ~1896 |
| John Clancy | Son | — | 13 | ~1927 |
| John Clancy | Head | — | 45 | ~1895 |
| Theresa Clancy | Daughter | — | 11 | ~1929 |
| Thomas Clancy | Son | — | 10 | ~1930 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 5
Allegheny, Pennsylvania · implied b. ~1925 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clancey |
| Given Name | Mary Lou |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 16
Allegheny-County, Pennsylvania · implied b. ~1924 — 10 household members
| Surname | Clancy |
| Given Name | Mary K |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Greentree Boro |
| 1935 Residence (County) | Allegheny |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Clancy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Clancy
Daughter · 1940 · age 16 · b. ~1924 · Pennsylvania
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Sibling
Thomas Clancy
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Clancy
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Clancy
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Clancy
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Clancy
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gene Clancy
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Clancy
Sibling · 1940 · age 5
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03404-00793)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ivy E Cross | 50 | Wife | — | Pennsylvania |
| 42 | Samuel Cross | 24 | Son | Truck Driver | Pennsylvania |
| 43 | David Ross | 25 | Son in law | Manager | Pennsylvania |
| 44 | Margaret Ross | 28 | Daughter | Stenographer | Pennsylvania |
| 45 | Edward Lee | 58 | Head | Farmer | England |
| 46 | Freda Lee | 52 | Wife | Farmerette | Pennsylvania |
| 47 | Edward Jr Lee | 27 | Son | Mechanic | Pennsylvania |
| 48 | Mildred Lee | 22 | Daughter | — | Pennsylvania |
| 49 | Ada Lee | 16 | Daughter | — | Pennsylvania |
| 50 | Thomas Lee | 14 | Son | — | Pennsylvania |
| 51 | Kathryn Fisher | 56 | Head | — | Pennsylvania |
| 52 | Phoebe Fisher | 26 | Daughter | Waitress | Pennsylvania |
| 53 | Robert Fisher | 21 | Son | Clerk | Pennsylvania |
| 54 | Joseph Mccheek | 22 | Guest | Laborer | Pennsylvania |
| 55 | John Clancy | 45 | Head | Fireman | Ireland |
| 56 | Nora Clancy | 44 | Wife | — | Ireland |
| 57 | Mary K Clancy THIS PERSON | 16 | Daughter | — | Pennsylvania |
| 58 | John Clancy | 13 | Son | — | Pennsylvania |
| 59 | Gene Clancy | 12 | Daughter | — | Pennsylvania |
| 60 | Theresa Clancy | 11 | Daughter | — | Pennsylvania |
| 61 | Thomas Clancy | 10 | Son | — | Pennsylvania |
| 62 | Anna Clancy | 8 | Daughter | — | Pennsylvania |
| 63 | Barbara Clancy | 5 | Daughter | — | Pennsylvania |
| 64 | Patricia Clancy | 5 | Daughter | — | Pennsylvania |
| 65 | Gottlieb Seaber | 53 | Head | Truck Driver | Pennsylvania |
| 66 | Rachael Seaber | 43 | Wife | — | Pennsylvania |
| 67 | Frederick Seaber | 25 | Son | Night Watchman | Pennsylvania |
| 68 | Olive Seaber | 24 | Daughter | Stenographer | Pennsylvania |
| 69 | Lester Seaber | 19 | Son | Truck Driver | Pennsylvania |
| 70 | Albert Bean | 36 | Head | Tester Meter | Tennessee |
| 71 | Lula B Bean | 25 | Wife | — | N. Carolina |
| 72 | Jimmy Bean | 6 | Son | — | Pennsylvania |
| 73 | Eugene Bean | 4 | Son | — | Pennsylvania |
| 74 | Valerie Bean | 2 | Daughter | — | Pennsylvania |
| 75 | John Larimer | 29 | Head | Meter Inspector | Pennsylvania |
| 76 | Audra Larimer | 27 | Wife | — | Virginia |
| 77 | John Jr Larimer | 3 | Son | — | Pennsylvania |
| 78 | Morris Abraham | 32 | Head | Sales Man | Pennsylvania |
| 79 | Amy Abraham | 26 | Wife | Laborer | Pennsylvania |
| 80 | Mitchell Abraham | 2 | Son | Social Security | Pennsylvania |
Related Census Records
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)