WS
William Sullivan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this William Sullivan across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1898), then head of a 5-person household.
Age 42
b. ~1898
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Sullivan |
| Given Name | William F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | RIDLEY PARK BORO. |
| 1935 Residence (County) | DELAWARE |
| Additional Details | |
| Occupation | Wholesale Salesman |
| Industry | Radio |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | C 2 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Wholesale Salesman |
| Township / Ward | Ridley Park Boro |
| Est. Birth Year | ~1898 |
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 Sullivan | Daughter | — | 8 | ~1932 |
| William Sullivan | Head | — | 42 | ~1898 |
| William Sullivan | Son | — | 9 | ~1931 |
| Henry Sullivan | Son | — | 11 | ~1929 |
| Florence Sullivan | Spouse | — | 39 | ~1901 |
Census Appearances
1920
Delaware, Pennsylvania
Head, age 22
Delaware, Pennsylvania · implied b. ~1898 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | United States |
| Mother's Birthplace | United States |
| Occupation | Laborer |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Delaware, Pennsylvania
Head, age 32
Delaware, Pennsylvania · implied b. ~1898 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | William J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 30 |
| Father's Birthplace | Switzerland |
| Mother's Birthplace | Pennsylvania |
| Occupation | Credit man |
| Industry | Dept store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 11000 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Head, age 42
Delaware-County, Pennsylvania · implied b. ~1898 — 5 household members
| Surname | Sullivan |
| Given Name | William F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | RIDLEY PARK BORO. |
| 1935 Residence (County) | DELAWARE |
| Occupation | Wholesale Salesman |
| Industry | Radio |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | C 2 |
| 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 Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Sullivan
Head · 1940 · age 42 · b. ~1898 · 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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03495-00642)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | David Lovekin | 12 | Son | — | Pennsylvania |
| 42 | Sylvia M. Lovekin | 10 | Daughter | — | Pennsylvania |
| 43 | Joseph A. Michell | 45 | Head | Collection Manager | Pennsylvania |
| 44 | Marjorie G. Michell | 43 | Wife | — | Delaware |
| 45 | Joseph A. Michell | 2 | Son | — | Pennsylvania |
| 46 | William F. Sullivan THIS PERSON | 42 | Head | Wholesale Salesman | Pennsylvania |
| 47 | Florence Sullivan | 39 | Wife | — | Pennsylvania |
| 48 | Henry Sullivan | 11 | Son | — | Pennsylvania |
| 49 | William Sullivan | 9 | Son | — | Pennsylvania |
| 50 | Florence Sullivan | 8 | Daughter | — | Pennsylvania |
| 51 | Hulda G. Bricker | 46 | Head | — | New Jersey |
| 52 | William Bricker | 25 | Son | Chiropractor | New Jersey |
| 53 | Ray Newell | 65 | Mother | — | New Jersey |
| 54 | Fannie E. Lamkin | 76 | Head | — | Ohio |
| 55 | Mary F. Lamkin | 45 | Daughter | Teacher | Ohio |
| 56 | Charles Knott | 26 | Head | Technician | Pennsylvania |
| 57 | Evelyn Knott | 25 | Wife | — | Rhode Island |
| 58 | Freeman Stowe | 40 | Head | Engineer | Pennsylvania |
| 59 | Dorothy Stowe | 25 | Wife | — | West Virginia |
| 60 | Thomas Sisson | 52 | Head | Pipe Fitter | England |
| 61 | Ada Mary Sisson | 58 | Wife | — | England |
| 62 | Sherman Brown | 23 | Head | Pipe Fitter | Pennsylvania |
| 63 | Marjorie Brown | 18 | Wife | — | New Jersey |
| 64 | Shirley Brown | 0 | Daughter | — | Pennsylvania |
| 65 | Nellie B. Hunt | 59 | Head | — | Maryland |
| 66 | Mary E. Ramsey | 54 | Head | Matron | Pennsylvania |
| 67 | Edwin W. Ramsey | 30 | Son | Clerk | Pennsylvania |
| 68 | Edith E. Ramsey | 64 | Step-daughter | File Clerk | Pennsylvania |
| 69 | Delmer W. Wekths | 43 | Head | Patternmaker | Missouri |
| 70 | Mary V. Wekths | 41 | Wife | — | Missouri |
| 71 | John Wekths | 20 | Son | Machinist Apprentice | Missouri |
| 72 | Kathryn Powers | 47 | Head | Calculator Operator | Pennsylvania |
| 73 | William Powers | 24 | Son | Electrician | Pennsylvania |
| 74 | Eleanor Powers | 22 | Daughter | Comptometer Operator | Pennsylvania |
| 75 | Geoffrey Powers | 20 | Son | Office Clerk | Pennsylvania |
| 76 | Nathan Haseltine | 25 | Head | Reporter | Pennsylvania |
| 77 | Emily Q. Haseltine | 27 | Wife | — | Pennsylvania |
| 78 | John R. Bear | 27 | Head | Salesman | Pennsylvania |
| 79 | Alice F. Bear | 26 | Wife | — | New Jersey |
| 80 | Gwendolyn Bear | 1 | Daughter | — | 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)