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Mary Frost — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Mary Frost across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 6-person household.
Age 16
b. ~1924
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Frost |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pgh. |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Penna. |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Thornburg |
| 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 |
|---|---|---|---|---|
| Sara Frost | Daughter | — | 23 | ~1917 |
| Abigail Van Valkenburgh | Other | — | 76 | ~1864 |
| Ida Frost | Spouse | — | 57 | ~1883 |
| Harry Frost | Head | — | 56 | ~1884 |
| Frederick Frost | Son | — | 26 | ~1914 |
| Mary Frost | Daughter | — | 16 | ~1924 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 5
Allegheny, Pennsylvania · implied b. ~1925 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frost |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 16
Allegheny-County, Pennsylvania · implied b. ~1924 — 6 household members
| Surname | Frost |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pgh. |
| 1935 Residence (County) | Allegheny |
| Income (1939) | 0 |
| Highest Grade | H-3 |
| 1935 Residence | Penna. |
| 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 Frost across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Frost
Daughter · 1940 · age 16 · b. ~1924 · Pennsylvania
★ You are viewing this record
Sibling
Sara Frost
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Frost
Sibling · 1940 · age 26
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-t0627-03419-00282)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John W. Whaley | 17 | Son | Mechanic | Pennsylvania |
| 2 | Charles R. Whaley | 20 | Son | Mechanic | Pennsylvania |
| 3 | Frank Gomer | 63 | Head | Salesman | Pennsylvania |
| 4 | Charlotte Gomer | 63 | Wife | — | Pennsylvania |
| 5 | Eliza Goldsbury | 34 | Maid | Maid | Mississippi |
| 6 | Karl W. Alvater | 52 | Head | Industrial Engineer | Germany |
| 7 | Hilda S. Alvater | 38 | Wife | — | Pennsylvania |
| 8 | Carl S. Alvater | 10 | Son | — | Illinois |
| 9 | Craig W. Alvater | 6 | Son | — | Pennsylvania |
| 10 | Paula Hush | 62 | Mother-in-law | — | Germany |
| 11 | Miller W. Hell | 63 | Head | Clerk - Director | West Virginia |
| 12 | Helen N. Hell | 57 | Wife | — | Maryland |
| 13 | William Hell | 15 | Son | — | Pennsylvania |
| 14 | Harry S. Kinley | 63 | Head | Attorney | Pennsylvania |
| 15 | Emma B. Kinley | 60 | Wife | — | Pennsylvania |
| 16 | Mildred Kinley | 37 | Daughter | Secretary | Pennsylvania |
| 17 | Robert B. Kinley | 35 | Son | Attorney | Pennsylvania |
| 18 | Rebecca Kinley | 85 | Mother | — | West Virginia |
| 19 | Richard A. Allen | 37 | Head | Clerk | Pennsylvania |
| 20 | Muriel P. Allen | 33 | Wife | — | Pennsylvania |
| 21 | Muriel Allen | 5 | Daughter | — | Pennsylvania |
| 22 | Richard Allen | 1 | Son | — | Pennsylvania |
| 23 | Margaret Crane | 22 | Maid | Maid | Pennsylvania |
| 24 | Harry D. Frost | 56 | Head | Mechanic | New York |
| 25 | Ida W. Frost | 57 | Wife | — | New York |
| 26 | Frederick A. Frost | 26 | Son | Clerk | New York |
| 27 | Sara J. Frost | 23 | Daughter | Stenographer | Pennsylvania |
| 28 | Mary E. Frost THIS PERSON | 16 | Daughter | — | Pennsylvania |
| 29 | Abigail Van Valkenburgh | 76 | Mother-in-law | — | New York |
| 30 | William J. Kues | 36 | Head | Office Manager | Illinois |
| 31 | Helen Kues | 36 | Wife | Teacher | Illinois |
| 32 | Earl Irving Kues | 5 | Son | — | Michigan |
| 33 | Margaret Blazer | 18 | Maid | Maid | Pennsylvania |
| 34 | Frank Kelsina | 45 | Head | Mechanic | Czechoslovakia |
| 35 | Bertha Kelsina | 37 | Wife | — | Czechoslovakia |
| 36 | Frank E. Kelsina | 13 | Son | — | Pennsylvania |
| 37 | Charles Kelsina | 10 | Son | — | Pennsylvania |
| 38 | Richard Kelsina | 3 | Son | — | Pennsylvania |
| 39 | Edward Kelsina | 1 | Son | — | Pennsylvania |
| 40 | Mary Kelsina | 74 | Mother | — | Czechoslovakia |
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)