WA
William Alexander — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this William Alexander across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents John & William — first a head (b.~1913), then head of a 4-person household.
Age 27
b. ~1913
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Alexander |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Florist |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1092 |
| Highest Grade | H-4 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Truck Driver |
| Township / Ward | Pittsburgh City |
| 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 |
|---|---|---|---|---|
| William Alexander | Head | — | 27 | ~1913 |
| Robert Alexander | Son | — | 2 | ~1938 |
| William Alexander | Son | — | 5 | ~1935 |
| Mary Alexander | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 6
Allegheny, Pennsylvania · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| 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 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| 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
Allegheny-County, Pennsylvania
Head, age 27
Allegheny-County, Pennsylvania · implied b. ~1913 — 4 household members
| Surname | Alexander |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (County) | Allegheny |
| Occupation | Truck Driver |
| Industry | Florist |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1092 |
| Highest Grade | H-4 |
| 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 Alexander across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Alexander (~0.92 confidence) and father William Alexander (~0.92 confidence) and mother Margaret Alexander (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Alexander
b. ~1875
Source father
● Household
· direct · ~0.92
Father
William Alexander
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Margaret Alexander
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Alexander
Head · 1940 · age 27 · b. ~1913 · Pennsylvania
★ You are viewing this record
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-t0627-03668-00250)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy Burkard | 1 | Daughter | — | Pennsylvania |
| 2 | William Mullen | 31 | Son-in-law | Laborer | Pennsylvania |
| 3 | Alex D. Henderson | 36 | Head | — | Pennsylvania |
| 4 | Charles Henderson | 17 | Son | — | Pennsylvania |
| 5 | Howard Henderson | 15 | Son | — | Pennsylvania |
| 6 | James Henderson | 13 | Son | — | Pennsylvania |
| 7 | Edward Henderson | 12 | Son | — | Pennsylvania |
| 8 | Agnes Means | 14 | Daughter | — | Pennsylvania |
| 9 | Ida Mae Means | 0 | Grand Daughter | — | Pennsylvania |
| 10 | Ethel V. D. Petzman | 49 | Head | — | Pennsylvania |
| 11 | Virginia M. Petzman | 19 | Daughter | New Worker | Pennsylvania |
| 12 | Andrew G. Petzman | 17 | Son | — | Pennsylvania |
| 13 | Edward Stephenson | 48 | Boarder | New Editor | Mississippi |
| 14 | William Alexander THIS PERSON | 27 | Head | Truck Driver | Pennsylvania |
| 15 | Mary D. Alexander | 25 | Wife | — | Pennsylvania |
| 16 | William Alexander | 5 | Son | — | Pennsylvania |
| 17 | Robert Alexander | 2 | Son | — | Pennsylvania |
| 18 | Benjamin Kyle | 30 | Head | Gardner Landscape | Ohio |
| 19 | Almina Kyle | 29 | Wife | — | Ohio |
| 20 | Robert Kyle | 6 | Son | — | Ohio |
| 21 | Julia Verret | 65 | Head | — | Pennsylvania |
| 22 | Hazel Verret | 38 | Daughter | Asst. Dept. Stenographer | Pennsylvania |
| 23 | Dorothy Verret | 25 | Daughter | Asst. Auditor | Pennsylvania |
| 24 | Myrtle Verret | 19 | Daughter | New Worker | Pennsylvania |
| 25 | Lee Campbell | 5 | Grand Daughter | — | Pennsylvania |
| 26 | Glenn Evans | 35 | Head | Manager | Pennsylvania |
| 27 | Mae D. Evans | 27 | Wife | — | New York |
| 28 | Naomi Evans | 6 | Daughter | — | Pennsylvania |
| 29 | Glenn Evans | 3 | Son | — | Pennsylvania |
| 30 | Raymond Kranche | 31 | Head | Elevator Operator | Pennsylvania |
| 31 | Irene Kranche | 24 | Wife | — | Ohio |
| 32 | Raymond Kranche | 5 | Son | — | Pennsylvania |
| 33 | Kenneth Kranche | 2 | Son | — | Pennsylvania |
| 34 | Harriet Dellefrouse | 73 | Head | — | England |
| 35 | Norman Russell | 34 | Son | Embalmer | Pennsylvania |
| 36 | Joseph Charlton | 70 | Head | — | Irish Free State |
| 37 | Margaret Charlton | 69 | Wife | — | Irish Free State |
| 38 | Dorothy Charlton | 34 | Daughter | Sales Woman | Pennsylvania |
| 39 | Edna Charlton | 22 | Daughter | Sales Woman | Pennsylvania |
| 40 | Jesse G. Delaney | 57 | Head | Conductor | Pennsylvania |
Pedigree Summary
William
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)