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William Hopkins — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this William Hopkins across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Oliver & Florence — first a son (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Hopkins |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Sewickley Township |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Laborer |
| Industry | Allegheny Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Sewickley Township |
| Est. Birth Year | ~1913 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Oliver Hopkins | Head | — | 62 | ~1878 |
| Wallace Hopkins | Son | — | 20 | ~1920 |
| William Hopkins | Son | — | 27 | ~1913 |
| Florence Hopkins | Spouse | — | 61 | ~1879 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 7
Allegheny, Pennsylvania · implied b. ~1913 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hopkins |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 17
Allegheny, Pennsylvania · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hopkins |
| Given Name | William O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 27
Allegheny-County, Pennsylvania · implied b. ~1913 — 4 household members
| Surname | Hopkins |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Sewickley Township |
| 1935 Residence (County) | Allegheny |
| Occupation | Laborer |
| Industry | Allegheny Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | 8 |
| 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 Hopkins across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Oliver Hopkins (~0.92 confidence) and mother Florence Hopkins (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Oliver Hopkins
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Florence Hopkins
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Hopkins
Son · 1940 · age 27 · b. ~1913 · Pennsylvania
★ You are viewing this record
Sibling
Wallace Hopkins
Sibling · 1940 · age 20
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03417-00007)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Claire Burton | 2 | Daughter | — | Pennsylvania |
| 2 | Margaret Crocker | 29 | Servant | Maid | Pennsylvania |
| 3 | George Kuenmerle | 67 | Head | — | Germany |
| 4 | Wilhelmina Kuenmerle | 53 | Wife | — | Germany |
| 5 | George Valley | 30 | Head | Heater Helper | Pennsylvania |
| 6 | Elizabeth Valley | 27 | Daughter | Manager | Pennsylvania |
| 7 | William Valley | 26 | Son | Helper | Pennsylvania |
| 8 | George Jr. Valley | 23 | Son | Cageman | Pennsylvania |
| 9 | Charlotte Valley | 21 | Son | New Worker | Pennsylvania |
| 10 | Edward E. Evans | 42 | Head | Chief Clerk | Pennsylvania |
| 11 | Maud M. Evans | 40 | Wife | — | Pennsylvania |
| 12 | Joseph Harrison | 33 | Head | Carpenter | Pennsylvania |
| 13 | Edith Harrison | 31 | Wife | — | Pennsylvania |
| 14 | Donald Harrison | 6 | Son | — | Pennsylvania |
| 15 | Gwendolyn Harrison | 2 | Daughter | — | Pennsylvania |
| 16 | Daniel Harrison | 67 | Head | Electrician | England |
| 17 | Anna Mary Harrison | 64 | Wife | — | Pennsylvania |
| 18 | Mary Ann Harrison | 34 | Daughter | Teacher | Pennsylvania |
| 19 | Claude R. Welch | 41 | Head | Laborer | Ohio |
| 20 | Marie M. Welch | 40 | Wife | — | Pennsylvania |
| 21 | Dorothy Welch | 14 | Daughter | — | Pennsylvania |
| 22 | Walter Edwards | 26 | Boarder | — | Pennsylvania |
| 23 | John Friday | 66 | Head | President | Pennsylvania |
| 24 | Diebold A. Jr. Friday | 30 | Daughter | — | Pennsylvania |
| 25 | Edward Friday | 25 | Son | Manager | Pennsylvania |
| 26 | Harriett Friday | 23 | Daughter | — | Pennsylvania |
| 27 | Marie Dollar | 25 | Servant | Chambermaid | Austria |
| 28 | John M. Watson | 68 | Head | Salesman | Pennsylvania |
| 29 | Blanche Q. Watson | 60 | Wife | — | Pennsylvania |
| 30 | Martha Watson | 32 | Daughter | — | Pennsylvania |
| 31 | Nancy Watson | 28 | Daughter | Stenographer | Pennsylvania |
| 32 | Edw. W. Mierck | 61 | Head | Gardener | Pennsylvania |
| 33 | Marie D. Mierck | 59 | Wife | — | Germany |
| 34 | Susan Mierck | 17 | Daughter | — | Pennsylvania |
| 35 | Oliver Hopkins | 62 | Head | Farmer | Pennsylvania |
| 36 | Florence Hopkins | 61 | Wife | — | Pennsylvania |
| 37 | William Hopkins THIS PERSON | 27 | Son | Laborer | Pennsylvania |
| 38 | Wallace Hopkins | 20 | Son | Truck Driver | Pennsylvania |
| 39 | Warren Nipper | 25 | Head | Inspector | Pennsylvania |
| 40 | Enela Nipper | 25 | Wife | — | Pennsylvania |
Pedigree Summary
William + 1 sibling
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)