MF
Mary Frederick — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this Mary Frederick across the 1920 and 1930 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1915), then head of a 6-person household.
Age 15
b. ~1915
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Allegheny, Pennsylvania |
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | England |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Brackenridge Borough |
| Est. Birth Year | ~1915 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Walter Frederick | Head | — | 39 | ~1891 |
| Margaret Frederick | Daughter | — | 10 | ~1920 |
| Mary Frederick | Daughter | — | 15 | ~1915 |
| Mary Frederick | Other | — | 37 | ~1893 |
| Eleanor Frederick | Daughter | — | 13 | ~1917 |
| Thomas Frederick | Daughter | — | 6 | ~1924 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 5
Allegheny, Pennsylvania · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| 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 | England |
| Mother Tongue | English |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 15
Allegheny, Pennsylvania · implied b. ~1915 — 6 household members
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read/Write | Yes |
| 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 Frederick across 2 US Census years (1920 and 1930) in Allegheny, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Frederick
Daughter · 1930 · age 15 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Eleanor Frederick
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Frederick
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Frederick
Sibling · 1930 · age 10
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
1930 US Federal Census — Allegheny, Pennsylvania
Open full size
1930 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel1960:0491)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Melvin Frederick | 19 | son | Laborer | Pennsylvania |
| 2 | Oscar Jones | 22 | step son | Furnace Man | Pennsylvania |
| 3 | Vera Frederick | 16 | daughter | None | Pennsylvania |
| 4 | Robert R Anderson | 47 | Head | Superintendent | Pennsylvania |
| 5 | Sherry Anderson | 42 | Wife-H | None | Pennsylvania |
| 6 | Mary L Anderson | 13 | daughter | None | Pennsylvania |
| 7 | Sarah E Anderson | 12 | daughter | None | Pennsylvania |
| 8 | Hugh Dougherty | 57 | Head | Inspector | Pennsylvania |
| 9 | Mary Dougherty | 57 | Wife-H | None | Pennsylvania |
| 10 | Ruth Dougherty | 18 | daughter | None | Pennsylvania |
| 11 | Mildred Dougherty | 10 | daughter | None | Pennsylvania |
| 12 | Glenn Dougherty | 7 | son | None | Pennsylvania |
| 13 | William H Snurf | 49 | Head | Furnaceman | Pennsylvania |
| 14 | Lillian Snurf | 47 | Wife-H | None | Pennsylvania |
| 15 | Arthur Snurf | 21 | son | Furnaceman | Pennsylvania |
| 16 | Virginia Snurf | 21 | Boarder | Catcher | Pennsylvania |
| 17 | Thomas E Van Tine | 46 | Head | Roller | Pennsylvania |
| 18 | Nellie A Van Tine | 46 | Wife-H | None | Pennsylvania |
| 19 | Erma Van Tine | 14 | daughter | None | Pennsylvania |
| 20 | James Van Tine | 12 | son | None | Pennsylvania |
| 21 | John Van Tine | 11 | son | None | Pennsylvania |
| 22 | Patricia Van Tine | 4 | daughter | None | Pennsylvania |
| 23 | Charles Downer | 53 | Head | Roller | Pennsylvania |
| 24 | Winnie Downer | 49 | Wife-H | None | Pennsylvania |
| 25 | Burnetta Downer | 25 | daughter | Teacher | Pennsylvania |
| 26 | Louise Downer | 13 | daughter | None | Pennsylvania |
| 27 | William Beatty | 42 | Head | Roller | Pennsylvania |
| 28 | Bertha Beatty | 39 | Wife-H | None | Pennsylvania |
| 29 | Lester Beatty | 18 | son | None | Pennsylvania |
| 30 | Helen Beatty | 15 | daughter | None | Pennsylvania |
| 31 | Harvey Kurn | 58 | Head | Laborer | Pennsylvania |
| 32 | Margaret Kurn | 55 | Wife-H | None | Pennsylvania |
| 33 | George Kurn | 28 | son | Molder Helper | Pennsylvania |
| 34 | John Kurn | 21 | son | Apprentice Molder | Pennsylvania |
| 35 | James Kurn | 16 | son | Laborer | Pennsylvania |
| 36 | Alice Kurn | 13 | daughter | None | Pennsylvania |
| 37 | Walter L Frederick | 39 | Head | Heater | Pennsylvania |
| 38 | Mary E Frederick | 37 | Wife-H | None | England |
| 39 | Mary Frederick THIS PERSON | 15 | daughter | None | Pennsylvania |
| 40 | Eleanor Frederick | 13 | daughter | None | Pennsylvania |
| 41 | Margaret Frederick | 10 | daughter | None | Pennsylvania |
| 42 | Thomas L Frederick | 6 | daughter | None | Pennsylvania |
| 43 | Harry Eny | 47 | Head | Electrician | Pennsylvania |
| 44 | Ada Eny | 45 | Wife-H | None | Pennsylvania |
| 45 | Harry Eny | 21 | son | None | Pennsylvania |
| 46 | Eleanor Eny | 18 | daughter | None | Pennsylvania |
| 47 | Wendell Eny | 7 | son | None | Pennsylvania |
| 48 | Harold Eny | 2 | son | None | Pennsylvania |
| 49 | Harold Jones | 25 | Head | Foreman | Pennsylvania |
| 50 | Dorothy Jones | 22 | Wife-H | None | Ohio |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)