MK
Mary Koch — 1900 US Census Record
Linked across censuses1900 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Koch across the 1900 and 1910 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1852), then head of a 9-person household.
Age 48
b. ~1852
Female
Spouse
Born: Germany
Married
1900 Census Record Details
| Census Year | 1900 |
| Location | Philadelphia, Pennsylvania |
| Surname | Koch |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Germany |
| Birth Month | Dec |
| Birth Year | 1852 |
| Year of Immigration | 1872 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
| Est. Birth Year | ~1852 |
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.
9 people recorded at the same address in the 1900 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Koch | Son | — | 19 | ~1881 |
| Charles Koch | Head | — | 50 | ~1850 |
| Joseph Koch | Son | — | 15 | ~1885 |
| Mary Koch | Spouse | — | 48 | ~1852 |
| Frank Koch | Son | — | 13 | ~1887 |
| Charles Koch | Son | — | 17 | ~1883 |
| John Koch | Son | — | 22 | ~1878 |
| Annie Koch | Daughter | — | 20 | ~1880 |
| Dora Koch | Daughter | — | 11 | ~1889 |
Census Appearances
1900
Philadelphia, Pennsylvania
Spouse, age 48
Philadelphia, Pennsylvania · implied b. ~1852 — 9 household members
| Surname | Koch |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Germany |
| Birth Month | Dec |
| Birth Year | 1852 |
| Year of Immigration | 1872 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Germany |
| Birthplace (normalized) | germany |
1910
Philadelphia, Pennsylvania
Spouse, age 60
Philadelphia, Pennsylvania · implied b. ~1850 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kach |
| Given Name | Marie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Germany |
| Years Married | 31 |
| Children Born | 6 |
| Children Living | 5 |
| Year of Immigration | 1876 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| 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 (1900 and 1910) in Philadelphia, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Koch
Spouse · 1900 · age 48 · b. ~1852 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1900 US Federal Census — Philadelphia, Pennsylvania
Open full size
1900 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1900:12thcensusofpopu1477unit:0580)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Michael Mullins | 55 | Head | Bartender | Ireland |
| 52 | Ellen Mullins | 51 | Wife | — | Ireland |
| 53 | Michael Mullins | 23 | Boarder | — | Ireland |
| 54 | Michael Tierney | 45 | Head | — | Ireland |
| 55 | Alice Tierney | 45 | Wife | — | Ireland |
| 56 | John Tierney | 21 | Son | — | Pennsylvania |
| 57 | Margaret Tierney | 19 | Daughter | — | Pennsylvania |
| 58 | Michael Jr Tierney | 16 | Son | — | Pennsylvania |
| 59 | Sarah Tierney | 13 | Daughter | — | Pennsylvania |
| 60 | Mary Tierney | 10 | Daughter | — | Pennsylvania |
| 61 | John Mcconville | 40 | Head | — | Ireland |
| 62 | Susan Mcconville | 46 | Wife | — | Ireland |
| 63 | Elizabeth Mcconville | 15 | Daughter | — | Pennsylvania |
| 64 | Sadie Mcconville | 13 | Daughter | — | Pennsylvania |
| 65 | Nellie Mcconville | 10 | Daughter | — | Pennsylvania |
| 66 | John Mcconville | 9 | Son | — | Pennsylvania |
| 67 | Charles Mcconville | 7 | Son | — | Pennsylvania |
| 68 | James Reid | 44 | Head | — | Ireland |
| 69 | Mary Reid | 44 | Wife | — | Ireland |
| 70 | Elizabeth Reid | 19 | Daughter | — | Pennsylvania |
| 71 | John Reid | 16 | Son | — | Pennsylvania |
| 72 | James Reid | 14 | Son | — | Pennsylvania |
| 73 | Thomas Reid | 12 | Son | — | Pennsylvania |
| 74 | Agnes Reid | 9 | Daughter | — | Pennsylvania |
| 75 | Rose Reid | 7 | Daughter | — | Pennsylvania |
| 76 | John Regan | 48 | Head | — | Ireland |
| 77 | Mary Regan | 47 | Wife | — | Ireland |
| 78 | William Regan | 21 | Son | — | Pennsylvania |
| 79 | Robert G Regan | 19 | Son | — | Pennsylvania |
| 80 | John J Regan | 17 | Son | — | Pennsylvania |
| 81 | Mary Ann Regan | 14 | Daughter | — | Pennsylvania |
| 82 | John Long | None | Head | — | Pennsylvania |
| 83 | Annie Long | None | Wife | — | Pennsylvania |
| 84 | Charles Long | None | Son | — | Pennsylvania |
| 85 | Annie Long | None | Daughter | — | Pennsylvania |
| 86 | Michael Brown | None | Head | — | Ireland |
| 87 | Teresa Brown | None | Wife | — | Ireland |
| 88 | John Brown | None | Son | — | Pennsylvania |
| 89 | Margaret Brown | None | Daughter | — | Pennsylvania |
| 90 | Michael Brown | None | Son | — | Pennsylvania |
| 91 | Joseph Brown | None | Son | — | Pennsylvania |
| 92 | Charles Koch | 49 | Head | — | Germany |
| 93 | Mary Koch THIS PERSON | 47 | Wife | — | Germany |
| 94 | John Koch | 22 | Son | — | Pennsylvania |
| 95 | Annie Koch | 20 | Daughter | — | Pennsylvania |
| 96 | John Koch | 18 | Son | — | Pennsylvania |
| 97 | Charles Koch | 16 | Son | — | Pennsylvania |
| 98 | Joseph Koch | 15 | Son | — | Pennsylvania |
| 99 | Frank Koch | 13 | Son | — | Pennsylvania |
| 100 | Dora Koch | 11 | Daughter | — | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1900 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)