WK
William Koch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this William Koch across the 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Male
Son
Born: Penna
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Koch |
| Given Name | William W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Upper Moreland |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Township / Ward | Upper Moreland |
| Est. Birth Year | ~1926 |
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 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Robert Koch | Son | — | 1 | ~1939 |
| Edwin Koch | Son | — | 19 | ~1921 |
| Vera Koch | Spouse | — | 42 | ~1898 |
| Louis Koch | Son | — | 18 | ~1922 |
| Henry Koch | Son | — | 12 | ~1928 |
| William Koch | Son | — | 14 | ~1926 |
| Louis Koch | Head | — | 46 | ~1894 |
Census Appearances
1930
Montgomery, Pennsylvania
Son, age 4
Montgomery, Pennsylvania · implied b. ~1926 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | William H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Penna |
| Mother's Birthplace | New York |
| Can Read/Write | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Montgomery-County, Pennsylvania
Son, age 14
Montgomery-County, Pennsylvania · implied b. ~1926 — 7 household members
| Surname | Koch |
| Given Name | William W |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Upper Moreland |
| 1935 Residence (County) | Montgomery |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same House |
| 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 William Koch across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Koch
Son · 1940 · age 14 · b. ~1926 · Pennsylvania
★ You are viewing this record
Sibling
Henry Koch
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edwin Koch
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Koch
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Koch
Sibling · 1940 · age 1
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
1940 US Federal Census — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03585-00402)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elizabeth Smith | 76 | Grandmother | — | Penna |
| 42 | John E Jr Moran | 32 | Head | Machine Operator | Penna |
| 43 | Hanna B Moran | 32 | Wife | — | Penna |
| 44 | Charles E Jr Moran | 11 | Son | — | Penna |
| 45 | Barbara Ann Moran | 9 | Daughter | — | Penna |
| 46 | Robert Allen Moran | 4 | Son | — | Penna |
| 47 | Edwin G Bready | 61 | Head | Auditing Freight | Penna |
| 48 | Laura B Bready | 62 | Wife | — | Penna |
| 49 | Claude E Ashman | 52 | Head | Laundress | Penna |
| 50 | Ella B Ashman | 31 | Daughter | Clerk | Penna |
| 51 | Marion E Bready | 52 | Head | Proprietor | Penna |
| 52 | Marion E Jr Bready | 18 | Daughter | — | Penna |
| 53 | Caleb G Bready | 13 | Son | — | Penna |
| 54 | Schuyler A Hobensack | 25 | Head | Driver Salesman | Penna |
| 55 | Vera M Hobensack | 23 | Wife | — | Penna |
| 56 | Barbara L Hobensack | 1 | Daughter | — | Penna |
| 57 | George E Hobensack | 0 | Son | — | Penna |
| 58 | Walter T Fesmire | 29 | Head | Phone Installer | Penna |
| 59 | Katharine E Fesmire | 20 | Wife | — | Penna |
| 60 | Walter T Jr Fesmire | 2 | Son | — | Penna |
| 61 | Louis E Sr Koch | 46 | Head | Hatter | Penna |
| 62 | Vera H Koch | 42 | Wife | — | New York |
| 63 | Edwin M Koch | 19 | Son | Salesman | Penna |
| 64 | Louis E Jr Koch | 18 | Son | — | Penna |
| 65 | William W Koch THIS PERSON | 14 | Son | — | Penna |
| 66 | Henry A Koch | 12 | Son | — | Penna |
| 67 | Robert A Koch | 1 | Son | — | Penna |
| 68 | George Sr Krinvic | 60 | Head | Bricklayer | Czechoslovakia |
| 69 | Christine Krinvic | 55 | Wife | — | Germany |
| 70 | Charles Krinvic | 37 | Son | Contract Hauler | Penna |
| 71 | Gertrude Krinvic | 29 | Daughter | Topper | Penna |
| 72 | George Jr Krinvic | 31 | Head | Contract Hauler | Penna |
| 73 | Barbara Krinvic | 22 | Wife | Machine Operator | Penna |
| 74 | Flora J Charles Krinvic | 13 | Step Son | — | Penna |
| 75 | Edward M Parker | 25 | Head | Florist | Penna |
| 76 | Mary J Parker | 20 | Wife | — | Massachusetts |
| 77 | James H Meredith | 73 | Head | Operator | Penna |
| 78 | Emma H Meredith | 71 | Wife | — | Penna |
| 79 | Elmer E Asquith | 49 | Head | Janitor | Penna |
| 80 | Emma B Asquith | 53 | Wife | — | Penna |
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)