WC
William Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this William Clark across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: Scotland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Clark |
| Given Name | William J |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Phila |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Clerk |
| Industry | Wholesale Clothing |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 780 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Clerk |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| William Clark | Head | — | 52 | ~1888 |
| William Clark | Son | — | 23 | ~1917 |
| Stanley Clark | Son | — | 26 | ~1914 |
| Mary Clark | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Philadelphia, Pennsylvania
Son, age 3
Philadelphia, Pennsylvania · implied b. ~1917
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Clark |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Scotland |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1930
Philadelphia, Pennsylvania
Son, age 13
Philadelphia, Pennsylvania · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1924 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Philadelphia-County, Pennsylvania
Son, age 23
Philadelphia-County, Pennsylvania · implied b. ~1917 — 4 household members
| Surname | Clark |
| Given Name | William J |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Phila |
| Naturalization Status | Naturalized |
| Occupation | Clerk |
| Industry | Wholesale Clothing |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 780 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Clark (~0.92 confidence) and father William Clark (~0.92 confidence) and mother Mary Clark (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Clark
b. ~1888
Source father
● Household
· direct · ~0.92
Father
William Clark
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Mary Clark
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Clark
Son · 1940 · age 23 · b. ~1917 · Pennsylvania
★ You are viewing this record
Sibling
Stanley Clark
Sibling · 1940 · age 26
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03749-00085)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annie R Mccauley | 2 | daughter | — | Penna |
| 42 | Walter T Wyker | 29 | head | Musician | Penna |
| 43 | Grace C Wyker | 28 | daughter | — | Penna |
| 44 | Gerald C Wyker | 6 | son | — | Pa |
| 45 | Arthur G Wyker | 2 | son | — | Penna |
| 46 | Edward J Brown | 29 | head | Truck Driver | Penna |
| 47 | Mary E Brown | 27 | wife | — | Penna |
| 48 | Edward J Jr Brown | 5 | son | — | Penna |
| 49 | Bernard J Bradley | 38 | head | Driver | Penna |
| 50 | Nora E Bradley | 38 | wife | — | England |
| 51 | Bernard G Bradley | 13 | son | — | Penna |
| 52 | Cornelius J Bradley | 11 | son | — | Penna |
| 53 | Elizabeth Bradley | 5 | daughter | — | Penna |
| 54 | Samuel Rosenberg | 58 | head | Tinsmith | Rumania |
| 55 | Fannie Rosenberg | 53 | wife | — | Rumania |
| 56 | Edward Rosenberg | 22 | son | Service Man | Penna |
| 57 | Albert E Kieser | 44 | head | Painter | New Jersey |
| 58 | Frances D Kieser | 40 | wife | — | New York |
| 59 | Jacqueline J Kieser | 14 | daughter | — | Penna |
| 60 | Richard G Kieser | 5 | son | — | Penna |
| 61 | Charles G Mcnamara | 68 | head | Porter | Eire |
| 62 | Angela Mcnamara | 64 | wife | — | Eire |
| 63 | William Clark | 52 | head | Operator | Scotland |
| 64 | Mary Clark | 56 | wife | — | Scotland |
| 65 | Stanley A Clark | 26 | son | Clerk | Scotland |
| 66 | William J Clark THIS PERSON | 23 | son | Clerk | Scotland |
| 67 | Joseph F Slattery | 46 | head | Chauffeur | Penna |
| 68 | Helen C Slattery | 42 | wife | — | Penna |
| 69 | Joseph J Slattery | 19 | son | Apprentice | Penna |
| 70 | Jerome R Slattery | 17 | son | New Worker | Penna |
| 71 | Virginia F Slattery | 15 | daughter | — | Penna |
| 72 | Mary T Slattery | 13 | daughter | — | Penna |
| 73 | Catherine Slattery | 10 | daughter | — | Penna |
| 74 | Helen J Slattery | 8 | daughter | — | Penna |
| 75 | Margaret D Brook | 47 | sister in law | Twister | Penna |
| 76 | John J Brook | 20 | nephew | Painter | Penna |
| 77 | Stephen G Kelly | 34 | head | Bookkeeper | Maryland |
| 78 | Elsie Kelly | 29 | wife | — | Ohio |
| 79 | Timothy Kelly | 3 | son | — | D.C. |
| 80 | William J Lundon | 56 | head | Laborer | Ireland |
Pedigree Summary
William + 1 sibling
Gen 1 · 3 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)