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Mary Gillespie — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Gillespie across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Gillespie |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 5 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1929 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Gillespie | Son | — | 4 | ~1936 |
| Thomas Gillespie | Son | — | 10 | ~1930 |
| Catherine Gillespie | Daughter | — | 16 | ~1924 |
| Robert Gillespie | Son | — | 8 | ~1932 |
| Thomas Gillespie | Head | — | 48 | ~1892 |
| Margaret Gillespie | Daughter | — | 19 | ~1921 |
| Catherine Gillespie | Spouse | — | 43 | ~1897 |
| Mary Gillespie | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 1
Allegheny, Pennsylvania · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Gillespie |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Maryland |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 11
Allegheny-County, Pennsylvania · implied b. ~1929 — 8 household members
| Surname | Gillespie |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Income (1939) | 0 |
| Highest Grade | Hs 5 |
| 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 Gillespie across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Gillespie
Daughter · 1940 · age 11 · b. ~1929 · Pennsylvania
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Sibling
Thomas Gillespie
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Gillespie
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Gillespie
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Gillespie
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Gillespie
Sibling · 1940 · age 8
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
38 people indexed on this census page (nara:1940:m-t0627-03674-00483)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Snyder | 60 | Head | — | Pennsylvania |
| 2 | Fred V. Kitchey | 39 | Head | Gen Clerk | Pennsylvania |
| 3 | Celia Kitchey | 36 | Wife | None Servant | Germany |
| 4 | Gregory Kotaynowski | 46 | Head | None Candy Maker | Pennsylvania |
| 5 | Vapclana Kotaynowski | 40 | Wife | — | Poland |
| 6 | Charles J. Kotaynowski | 15 | Son | — | Pennsylvania |
| 7 | Thomas Gillespie | 48 | Head | Emergency Man | Pennsylvania |
| 8 | Catherine Gillespie | 43 | Wife | — | Ohio |
| 9 | Margaret Gillespie | 19 | Daughter | New Worker | Pennsylvania |
| 10 | Catherine Gillespie | 16 | Daughter | — | Pennsylvania |
| 11 | Thomas Gillespie | 10 | Son | — | Pennsylvania |
| 12 | Mary Jane Gillespie THIS PERSON | 11 | Daughter | — | Pennsylvania |
| 13 | Robert Gillespie | 8 | Son | — | Pennsylvania |
| 14 | James Gillespie | 4 | Son | — | Pennsylvania |
| 15 | Frank Bauerley | 58 | Head | None Salesman | Pennsylvania |
| 16 | Lena Bauerley | 56 | Wife | — | Pennsylvania |
| 17 | Nan Bertholet | 60 | Sister-in-law | — | Pennsylvania |
| 18 | Joseph Bertholet | 50 | Brother-in-law | — | Pennsylvania |
| 19 | Robert Cuhn | 39 | Lodger | — | Pennsylvania |
| 20 | Myrtle Wagner | 36 | Lodger | — | Pennsylvania |
| 21 | Richard E. Meeks | 70 | Head | None Shipper | Pennsylvania |
| 22 | Sophie Meeks | 68 | Wife | — | Pennsylvania |
| 23 | Donald Meeks | 20 | Son | None Metal Polisher | Pennsylvania |
| 24 | William Honig | 52 | Head | None Laborer | Pennsylvania |
| 25 | Margaret Honig | 49 | Wife | — | Pennsylvania |
| 26 | Edward Honig | 26 | Son | — | Pennsylvania |
| 27 | William Lampus | 41 | Head | None Checker | Pennsylvania |
| 28 | Henrietta Lampus | 46 | Wife | — | Pennsylvania |
| 29 | Elizabeth Lampus | 13 | Daughter | — | Pennsylvania |
| 30 | Dorothy Lampus | 12 | Daughter | — | Pennsylvania |
| 31 | Robert Lampus | 10 | Son | — | Pennsylvania |
| 32 | Richard Lampus | 5 | Son | — | Pennsylvania |
| 33 | William L. Fisher | 46 | Head | None Salesman | Penna. |
| 34 | Alvina Fisher | 47 | Wife | None Servant | Ohio |
| 35 | Virginia Fisher | 15 | Daughter | — | Penna. |
| 36 | Minnie Mcgahey | 67 | Head | — | Germany |
| 37 | Dorothy Deer | 22 | Grdaughter | None Operator | Pennsylvania |
| 38 | James Mcginley | 43 | Head | — | Pennsylvania |
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)