JK
John Koch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Luzerne-County, Pennsylvania
Our Model Tree links this John Koch across the 1930 and 1940 US Censuses in Luzerne-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1895), then head of a 6-person household.
Age 45
b. ~1895
Male
Head
Born: Penna
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Luzerne-County, Pennsylvania |
| Surname | Koch |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Penna |
| 1935 Residence (City) | Denison Township |
| 1935 Residence (County) | Luzerne |
| Additional Details | |
| Occupation | laborer |
| Industry | ochre P.A. |
| Class of Worker | GW |
| Hours Worked | 45 |
| Income (1939) | 561 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Occupation | Laborer |
| Township / Ward | Denison Township |
| Est. Birth Year | ~1895 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Koch | Head | — | 45 | ~1895 |
| Esther Koch | Daughter | — | 14 | ~1926 |
| Naomi Koch | Daughter | — | 11 | ~1929 |
| Emily Koch | Daughter | — | 16 | ~1924 |
| Lydia Koch | Spouse | — | 45 | ~1895 |
| Lillian Koch | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Luzerne, Pennsylvania
Head, age 34
Luzerne, Pennsylvania · implied b. ~1896 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | John G |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Penna |
| Age at First Marriage | 25 |
| Father's Birthplace | Penna |
| Mother's Birthplace | Penna |
| Occupation | Bus Owner |
| Industry | Auto Bus Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Luzerne-County, Pennsylvania
Head, age 45
Luzerne-County, Pennsylvania · implied b. ~1895 — 6 household members
| Surname | Koch |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Penna |
| 1935 Residence (City) | Denison Township |
| 1935 Residence (County) | Luzerne |
| Occupation | laborer |
| Industry | ochre P.A. |
| Class of Worker | GW |
| Hours Worked | 45 |
| Income (1939) | 561 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Koch
Head · 1940 · age 45 · b. ~1895 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Luzerne-County, Pennsylvania
Open full size
1940 US Federal Census — Luzerne-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03549-00725)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Louie Kalbojinowski | 51 | Head | Laborer | Lithuania |
| 42 | Anthony Lord | 45 | Partner | Laborer | Italy |
| 43 | James Sipler | 69 | Head | Stone Mason | Penna |
| 44 | Donald Sipler | 24 | Son | Laborer | Penna |
| 45 | Frederick Sipler | 59 | Head | Laborer | Penna |
| 46 | Florence Sipler | 50 | Wife | Laborer | Penna |
| 47 | Louis Sipler | 27 | Son | Laborer | Penna |
| 48 | Merritt Sipler | 14 | Son | — | Penna |
| 49 | Carl Sipler | 29 | Head | Laborer | Penna |
| 50 | Bina Sipler | 24 | Wife | — | Penna |
| 51 | Ernest Sipler | 5 | Son | — | Penna |
| 52 | Simon Savage | 64 | Head | Laborer | Lithuania |
| 53 | Elizabeth Savage | 60 | Wife | — | Lithuania |
| 54 | Frank Savage | 20 | Son | Laborer | Penna |
| 55 | Henry Yeager | 25 | Head | Printer | Penna |
| 56 | Margaret Yeager | 19 | Wife | — | Penna |
| 57 | Joyce Yeager | 5 | daughter | — | Penna |
| 58 | John Yeager | 63 | Father | — | Penna |
| 59 | Henrietta Yeager | 62 | Mother | — | Penna |
| 60 | John Koch THIS PERSON | 45 | Head | Laborer | Penna |
| 61 | Lydia Koch | 45 | Wife | — | Penna |
| 62 | Emily Koch | 16 | daughter | — | Penna |
| 63 | Esther Koch | 14 | daughter | — | Penna |
| 64 | Naomi Koch | 11 | daughter | — | Penna |
| 65 | Lillian Koch | 9 | daughter | — | Penna |
| 66 | John Bruggulis | 59 | Head | Laborer | Lithuania |
| 67 | Stefania Bruggulis | 50 | Wife | — | Lithuania |
| 68 | Peter Bruggulis | 20 | Son | Laborer | Penna |
| 69 | Pauline Bruggulis | 15 | daughter | — | Penna |
| 70 | Jesse Bruggulis | 13 | daughter | — | Penna |
| 71 | Louise Bruggulis | 10 | daughter | — | Penna |
| 72 | Charles Bruggulis | 18 | Son | — | Penna |
| 73 | John Jr. Bruggulis | 30 | Head | Laborer | Penna |
| 74 | Nicholas Luava | 50 | Head | Laborer | Poland |
| 75 | Helen Luava | 35 | Wife | — | New York |
| 76 | Margaret Luava | 6 | daughter | — | Penna |
| 77 | Russel Luava | 4 | Son | — | Penna |
| 78 | Raymond Luava | 2 | Son | — | Penna |
| 79 | Stanley Kaminsky | 37 | Head | Prop. Restaurant | Penna |
| 80 | Theresa Kaminsky | 35 | Wife | — | New York |
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)