WF
William Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Union-County, Pennsylvania
Our Model Tree links this William Frederick across the 1930 and 1940 US Censuses in Union-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 5-person household.
Age 14
b. ~1926
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, Pennsylvania |
| Surname | Frederick |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Mifflinburg Borough |
| 1935 Residence (County) | Union |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Mifflinburg Borough |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Florence Frederick | Spouse | — | 44 | ~1896 |
| William Frederick | Son | — | 14 | ~1926 |
| Anna Frederick | Daughter | — | 10 | ~1930 |
| Franklin Frederick | Son | — | 16 | ~1924 |
| Cloyd Frederick | Head | — | 52 | ~1888 |
Census Appearances
1930
Union, Pennsylvania
Son, age 4
Union, Pennsylvania · implied b. ~1926 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Union-County, Pennsylvania
Son, age 14
Union-County, Pennsylvania · implied b. ~1926 — 5 household members
| Surname | Frederick |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Mifflinburg Borough |
| 1935 Residence (County) | Union |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 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 14 · b. ~1926 · Pennsylvania
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Sibling
Anna Frederick
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Franklin Frederick
Sibling · 1940 · age 16
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 — Union-County, Pennsylvania
Open full size
1940 US Federal Census — Union-County, Pennsylvania
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-03615-00416)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Cloyd Frederick | 52 | Head | Proprietor | Pennsylvania |
| 42 | Florence Frederick | 44 | Wife | — | Pennsylvania |
| 43 | Franklin R. Frederick | 16 | Son | — | Pennsylvania |
| 44 | William A. Frederick THIS PERSON | 14 | Son | — | Pennsylvania |
| 45 | Anna B. Frederick | 10 | Daughter | — | Pennsylvania |
| 46 | Charles W. Gould | 31 | Head | Proprietor | Pennsylvania |
| 47 | Fay Gould | 24 | Wife | — | Pennsylvania |
| 48 | Charles Jr. Gould | 2 | Son | — | Pennsylvania |
| 49 | Sheldon L. Gould | 1 | Son | — | Pennsylvania |
| 50 | Wayne L. Gould | 0 | Son | — | Pennsylvania |
| 51 | Velva Kline | 23 | Housekeeper | Housekeeper | Pennsylvania |
| 52 | Marshall R. Speid | 31 | Head | Barber | Pennsylvania |
| 53 | Dorothy Speid | 27 | Wife | Folder | Pennsylvania |
| 54 | James Speid | 3 | Son | — | Pennsylvania |
| 55 | Sydney E. Bateman | 76 | Head | — | Pennsylvania |
| 56 | Ethel C. Bateman | 57 | Wife | — | Pennsylvania |
| 58 | John L. Tunnell | 37 | Head | Medical Doctor | Pennsylvania |
| 59 | Marie J. M. Tunnell | 35 | Wife | — | Nova Scotia |
| 60 | John L. Jr. Tunnell | 11 | Son | — | Pennsylvania |
| 61 | Blaine S. Tunnell | 9 | Son | — | Pennsylvania |
| 62 | Carl H. Tunnell | 6 | Son | — | Pennsylvania |
| 63 | Jennie Kuler | 21 | Housekeeper | Housekeeper | Pennsylvania |
| 64 | P. Nelson Schlegel | 37 | Head | Preacher | Pennsylvania |
| 65 | Charlotte E. Schlegel | 32 | Wife | — | Massachusetts |
| 66 | Verna E. Schlegel | 7 | Daughter | — | Long Island |
| 67 | Barbara L. Schlegel | 3 | Daughter | — | Pennsylvania |
| 68 | Charlotte L. Schlegel | 1 | Daughter | — | Pennsylvania |
| 69 | Eleanor E. Poope | 16 | Lodger | — | Pennsylvania |
| 70 | Samuel B. Miller | 70 | Head | Post Master | Pennsylvania |
| 71 | Sarah E. Miller | 69 | Wife | — | Pennsylvania |
| 72 | Ward E. Wise | 60 | Head | Proprietor | Pennsylvania |
| 73 | Harriet B. Wise | 56 | Wife | — | Pennsylvania |
| 74 | Irene Mary E. Wise | 16 | Daughter | — | Pennsylvania |
| 75 | Charles E. Fiedermuth | 63 | Head | Laborer | Pennsylvania |
| 76 | Mary K. Fiedermuth | 59 | Wife | — | Pennsylvania |
| 77 | William A. Patton | 60 | Head | Caretaker | England |
| 78 | Caroline B. Patton | 64 | Wife | — | Pennsylvania |
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)