MK
Mary Koch — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this Mary Koch across the 1920 and 1930 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1872), then head of a 7-person household.
Age 48
b. ~1872
Female
Spouse
Born: Germany
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Allegheny, Pennsylvania |
| Surname | Koch |
| Given Name | Mary S. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Germany |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
| Township / Ward | North Braddock Borough |
| Est. Birth Year | ~1872 |
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.
7 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Albert Koch | Son | — | 8 | ~1912 |
| Henry Koch | Son | — | 21 | ~1899 |
| Joseph Koch | Head | — | 59 | ~1861 |
| Louisa Koch | Daughter | — | 24 | ~1896 |
| Charles Koch | Son | — | 17 | ~1903 |
| Josephine Koch | Daughter | — | 12 | ~1908 |
| Mary Koch | Spouse | — | 48 | ~1872 |
Census Appearances
1920
Allegheny, Pennsylvania
Spouse, age 48
Allegheny, Pennsylvania · implied b. ~1872 — 7 household members
| Surname | Koch |
| Given Name | Mary S. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Germany |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
1930
Allegheny, Pennsylvania
Spouse, age 55
Allegheny, Pennsylvania · implied b. ~1875 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | Marie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Germany |
| Naturalization Status | Naturalized |
| Year of Immigration | 1889 |
| Age at First Marriage | 24 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
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 Koch across 2 US Census years (1920 and 1930) in Allegheny, Pennsylvania, using XGBoost record linkage.
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This person
Anchor record
Mary Koch
Spouse · 1920 · age 48 · b. ~1872 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Allegheny, Pennsylvania
Open full size
1920 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1515unit:0859)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Sandow A. G. Medeate | 29 | Head | Crane Operator | Italy |
| 52 | Mary E. Medeate | 24 | wife | None | Italy |
| 53 | Jovand C. Medeate | 2 | Daughter | None | Pennsylvania |
| 54 | Carmella Medeate | 1 | Daughter | None | Pennsylvania |
| 55 | Joseph Medeate | 21 | Brother | Laborer | Italy |
| 56 | William Aites | 37 | Head | Foreman | Pennsylvania |
| 57 | Anna Aites | 33 | wife | None | Germany |
| 58 | Kenneth Aites | 13 | Son | None | Pennsylvania |
| 59 | Ernest Aites | 30 | Head | Electrician | Pennsylvania |
| 60 | Bessie Aites | 29 | wife | None | Pennsylvania |
| 61 | Ester Aites | 1 | Daughter | None | Pennsylvania |
| 62 | Roy Spangler | 22 | Boarder | Electrician | Pennsylvania |
| 63 | Twila Spangler | 17 | Boarder | Wire Insulator | Pennsylvania |
| 64 | William Fenton | 46 | Head | Laborer | Germany |
| 65 | Elizabeth Fenton | 42 | wife | None | Germany |
| 66 | Carl Fenton | 22 | son | Machinist | Pennsylvania |
| 67 | Mary Fenton | 14 | Daughter | None | Pennsylvania |
| 68 | Elizabeth Fenton | 11 | Daughter | None | Pennsylvania |
| 69 | William Fenton | 7 | son | None | Pennsylvania |
| 70 | John Korbel | 45 | Head | Mill Wright | Hungary |
| 71 | Mary Korbel | 43 | wife | None | Hungary |
| 72 | Gisella Korbel | 14 | Daughter | None | New York |
| 73 | Helen Korbel | 12 | Daughter | None | Pennsylvania |
| 74 | William Korbel | 4 | Son | None | Pennsylvania |
| 75 | George Korbel | 20 | son | Machine Hand | New York |
| 76 | Charles Brattberg | 49 | Head | Laborer | Sweden |
| 77 | Catherine Brattberg | 39 | wife | None | Sweden |
| 78 | Annie Brattberg | 17 | Daughter | Time Clerk | Pennsylvania |
| 79 | Freda Brattberg | 16 | Daughter | None | Pennsylvania |
| 80 | Karl Brattberg | 14 | Son | None | Pennsylvania |
| 81 | Edwin Brattberg | 10 | son | None | Pennsylvania |
| 82 | Hilda Brattberg | 4 | Daughter | None | Pennsylvania |
| 83 | Oscar Brattberg | 8 | son | None | Pennsylvania |
| 84 | Elvan Brattberg | 1 | son | None | Pennsylvania |
| 85 | Oscar Anderson | 37 | Boarder | Laborer | Sweden |
| 86 | Joseph A. Koch | 59 | Head | Crane Operator | Switzerland |
| 87 | Mary S. Koch THIS PERSON | 48 | wife | None | Germany |
| 88 | Louisa Koch | 24 | Daughter | Laundress | Pennsylvania |
| 89 | Henry J. Koch | 21 | Son | Machinist | Pennsylvania |
| 90 | Charles D. Koch | 17 | Son | Laborer | Pennsylvania |
| 91 | Josephine Koch | 12 | Daughter | None | Pennsylvania |
| 92 | Albert E. Koch | 8 | Son | None | Pennsylvania |
| 93 | John Dedo | 45 | Head | Laborer | Austria |
| 94 | Mary Dedo | 44 | wife | None | Austria |
| 95 | Catherine Dedo | 11 | Daughter | None | Pennsylvania |
| 96 | Albert Dedo | 9 | Son | None | Pennsylvania |
| 97 | Helen Dedo | 7 | Daughter | None | Pennsylvania |
| 98 | William Dedo | 3 | Son | None | Pennsylvania |
| 99 | James Henderson | 52 | Head | Clerk | Scotland |
| 100 | Christina Henderson | 47 | wife | None | Scotland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)