WF
William Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Carbon-County, Pennsylvania
Our Model Tree links this William Frederick across the 1930 and 1940 US Censuses in Carbon-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Carbon-County, Pennsylvania |
| Surname | Frederick |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Summit Hill Borough |
| 1935 Residence (County) | Carbon |
| Additional Details | |
| Occupation | New Worker |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | New Worker |
| Township / Ward | Summit Hill Borough |
| Est. Birth Year | ~1919 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Norman Frederick | Son | — | 10 | ~1930 |
| Hannah Frederick | Daughter | — | 18 | ~1922 |
| William Frederick | Son | — | 21 | ~1919 |
| Hazel Frederick | Daughter | — | 17 | ~1923 |
| Louis Frederick | Head | — | 45 | ~1895 |
| Racheal Frederick | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Carbon, Pennsylvania
Son, age 11
Carbon, Pennsylvania · implied b. ~1919 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | William E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Carbon-County, Pennsylvania
Son, age 21
Carbon-County, Pennsylvania · implied b. ~1919 — 6 household members
| Surname | Frederick |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Summit Hill Borough |
| 1935 Residence (County) | Carbon |
| Occupation | New Worker |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Frederick across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Frederick
Son · 1940 · age 21 · b. ~1919 · Pennsylvania
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Sibling
Hannah Frederick
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Norman Frederick
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hazel Frederick
Sibling · 1940 · age 17
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 — Carbon-County, Pennsylvania
Open full size
1940 US Federal Census — Carbon-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03461-00634)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Patrick Bonner | 61 | Head | Laborer | Pennsylvania |
| 42 | Agnes Bonner | 54 | Wife | Housekeeper | Pennsylvania |
| 43 | Helen Bonner | 29 | Daughter | Elementary Teacher | Pennsylvania |
| 44 | James Bonner | 21 | Son | Laborer | Pennsylvania |
| 45 | Robert Bonner | 18 | Son | New Worker | Pennsylvania |
| 46 | Thomas Bonner | 16 | Son | — | Pennsylvania |
| 47 | Richard Bonner | 14 | Son | — | Pennsylvania |
| 48 | Margaret Manning | 33 | Daughter | Trained Nurse | Pennsylvania |
| 49 | Maria Manning | 2 | Daughter | — | Pennsylvania |
| 50 | Manus Mchugh | 40 | Head | Laborer | Pennsylvania |
| 51 | Rose Mchugh | 32 | Wife | Presser | Pennsylvania |
| 52 | Catharine Mchugh | 8 | Daughter | — | Pennsylvania |
| 53 | Rose Mchugh | 5 | Daughter | — | Pennsylvania |
| 54 | James Kane | 73 | Uncle | — | Pennsylvania |
| 55 | Louis Frederick | 45 | Head | Repair Laborer | Pennsylvania |
| 56 | Racheal Frederick | 43 | Wife | Housekeeper | Pennsylvania |
| 57 | William Frederick THIS PERSON | 21 | Son | New Worker | Pennsylvania |
| 58 | Hannah Frederick | 18 | Daughter | — | Pennsylvania |
| 59 | Hazel Frederick | 17 | Daughter | — | Pennsylvania |
| 60 | Norman Frederick | 10 | Son | — | Pennsylvania |
| 61 | Sarah O'Donnell | 57 | Head | Housekeeper | Pennsylvania |
| 62 | Nancy O'Donnell | 23 | Daughter | — | Pennsylvania |
| 63 | Edward O'Donnell | 14 | Son | — | Pennsylvania |
| 64 | Andrew O'Gorman | 24 | Nephew | New Worker | Pennsylvania |
| 65 | Frank Ronalli | 51 | Head | Laborer | Italy |
| 66 | Rose Ronalli | 43 | Wife | Housekeeper | Italy |
| 67 | Alice Ronalli | 16 | Daughter | — | Italy |
| 68 | Mary Ronalli | 15 | Daughter | — | Italy |
| 69 | Catharine Bevich | 56 | Head | Housekeeper | Austria |
| 70 | Price|Brice Bevich | None | Joseph | 32 | No 8 |
| 71 | George Bevich | 25 | Son | Laborer | Illinois |
| 72 | Catharine Bevich | 21 | In law | — | Pennsylvania |
| 73 | Angela Stival | 55 | Head | — | Italy |
| 74 | Arthur Stival | 25 | Son | Laborer | Pennsylvania |
| 75 | Ida Stival | 24 | Daughter | Maid | Pennsylvania |
| 76 | Peter Stival | 22 | Son | New Worker | Pennsylvania |
| 77 | Joseph Stival | 21 | Son | New Worker | Pennsylvania |
| 78 | Jennie Stival | 19 | Daughter | Housekeeper | Pennsylvania |
| 79 | Theresa Grossa | 71 | Sister | — | Italy |
| 80 | Gaetano Cavelli | 45 | Head | Repair Laborer | Italy |
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)