JK
John Koch — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Medina, Texas
Our Model Tree links this John Koch across the 1920, 1930 and 1940 US Censuses in Medina, Texas (XGBoost, ~Confirmed) — first a head (b.~1860), then head of a 3-person household.
Age 70
b. ~1860
Male
Head
Born: Texas
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Medina, Texas |
| Surname | Koch |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Texas |
| Age at First Marriage | 24 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Additional Details | |
| Can Read/Write | Yes |
| Home Owned/Rented | 3500 |
| Veteran | O |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Township / Ward | Justice Precinct No 4 |
| Est. Birth Year | ~1860 |
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.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Koch | Spouse | — | 64 | ~1866 |
| John Koch | Head | — | 70 | ~1860 |
| Loretta Koch | Daughter | — | 20 | ~1910 |
Census Appearances
1920
Medina, Texas
Head, age 58
Medina, Texas · implied b. ~1862 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Texas |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Farming |
| Industry | Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1930
Medina, Texas
Head, age 70
Medina, Texas · implied b. ~1860 — 3 household members
| Surname | Koch |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Texas |
| Age at First Marriage | 24 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Home Owned/Rented | 3500 |
| Veteran | O |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Medina-County, Texas
Other, age 78
Medina-County, Texas · implied b. ~1862 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | John S. |
| Relationship to Head | Father |
| Sex | M |
| Color / Race | White |
| Age | 78 |
| Marital Status | Widowed |
| Birthplace | Texas |
| 1935 Residence (City) | Justice Precinct 1 |
| 1935 Residence (County) | Medina |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 John Koch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Koch
Head · 1930 · age 70 · b. ~1860 · Texas
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Medina, Texas
Open full size
1930 US Federal Census — Medina, Texas
Page Contents
50 people indexed on this census page (ia:1930:texascensus00ree2376:0176)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Rosa Barrella | 21 | Wife | — | Mexico |
| 2 | Mafila Barrella | 62 | Head | Laborer | Mexico |
| 3 | Adela Barrella | 58 | Wife | — | Mexico |
| 4 | Apilonia Barrella | 28 | Son | Laborer | Mexico |
| 5 | Isac Barrella | 26 | Son | Laborer | Mexico |
| 6 | Maria Barrella | 24 | Daughter | — | Mexico |
| 7 | Jesus Barrella | 16 | Son | — | Mexico |
| 8 | Simon Barrella | 30 | Head | Laborer | Mexico |
| 9 | Petra Barrella | 24 | Wife | — | Mexico |
| 10 | Juan Barrella | 6 | Son | — | Texas |
| 11 | Rigoberto Barrella | 4 | Son | — | Texas |
| 12 | Beatrice Barrella | 2 | Daughter | — | Texas |
| 13 | Jose Barrella | 1 | Son | — | Texas |
| 14 | Jose Revilla | 30 | Head | Laborer | Mexico |
| 15 | Josefina Revilla | 28 | Wife | — | Mexico |
| 16 | Jose Revilla | 6 | Son | — | Texas |
| 17 | Fortunella Revilla | 3 | Daughter | — | Texas |
| 18 | Ignacia Garcia | 26 | Head | Laborer | Mexico |
| 19 | Felicitas Garcia | 28 | Sister | — | Mexico |
| 20 | Minerva Constante | 71 | Head | Laborer | Mexico |
| 21 | Guadalupe Constante | 63 | Daughter | — | Mexico |
| 22 | Charle Constante | 20 | Daughter | — | Mexico |
| 23 | John M. Koch THIS PERSON | 70 | Head | — | Texas |
| 24 | Mary Koch | 64 | Wife | — | Texas |
| 25 | Loretta Koch | 20 | Daughter | — | Texas |
| 26 | Oscar Rothe | 37 | Head | Farmer | Texas |
| 27 | Selma Rothe | 35 | Wife | — | Texas |
| 28 | Melvina Rothe | 10 | Daughter | — | Texas |
| 29 | Ben Rodriguez | 46 | Head | Laborer | Texas |
| 30 | Irene Rodriguez | 42 | Wife | — | Texas |
| 31 | Vega (Ab) Rodriguez | 20 | Daughter | — | Texas |
| 32 | Elda Rodriguez | 18 | Daughter | — | Texas |
| 33 | Harvey Rodriguez | 16 | Son | Laborer | Texas |
| 34 | Lucille Rodriguez | 13 | Daughter | — | Texas |
| 35 | Dorothy Rodriguez | 11 | Daughter | — | Texas |
| 36 | Julius Rodriguez | 8 | Son | — | Texas |
| 37 | Herbert Rodriguez | 7 | Son | — | Texas |
| 38 | Calvin Rodriguez | 4 | Son | — | Texas |
| 39 | Sam Bondels | 47 | Head | Farmer | Texas |
| 40 | Hilda Bondels | 42 | Wife | — | Texas |
| 41 | Erwin Bondels | 17 | Son | Laborer | Texas |
| 42 | Aaron Bondels | 13 | Son | — | Texas |
| 43 | Modena Bondels | 10 | Daughter | — | Texas |
| 44 | Imogene Bondels | 6 | Daughter | — | Texas |
| 45 | Rodger Knowles | 37 | Head | Laborer | Texas |
| 46 | L. Boca Knowles | 22 | Wife | — | Texas |
| 47 | Hughes Knowles | 16 | Son | Laborer | Texas |
| 48 | Howard Knowles | 6 | Son | — | Texas |
| 49 | Maxwell Knowles | 1 | Son | — | Texas |
| 50 | Juan Robles | 60 | Head | Laborer | Mexico |
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)