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William Harper — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this William Harper across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed), with identified parents Gertrude & William — first a son (b.~1916), then head of a 6-person household.
Age 24
b. ~1916
Male
Son
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Harper |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Maplewood City |
| 1935 Residence (County) | St. Louis |
| Additional Details | |
| Occupation | Clerk |
| Industry | Drugs |
| Class of Worker | PW |
| Hours Worked | 28 |
| Income (1939) | 840 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Clerk |
| Township / Ward | Maplewood City |
| Est. Birth Year | ~1916 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Alice Harper | Daughter | — | 20 | ~1920 |
| William Harper | Head | — | 48 | ~1892 |
| Genevieve Harper | Other | — | 22 | ~1918 |
| Mary Harper | Other | — | 4 | ~1936 |
| William Harper | Son | — | 24 | ~1916 |
| Gertrude Harper | Spouse | — | 41 | ~1899 |
Census Appearances
1920
St Louis, …
Son, age 4
St Louis, Missouri · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
St Louis, …
Son, age 14
St Louis, Missouri · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | William L. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-County, Missouri
Son, age 24
St.-Louis-County, Missouri · implied b. ~1916 — 6 household members
| Surname | Harper |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | Maplewood City |
| 1935 Residence (County) | St. Louis |
| Occupation | Clerk |
| Industry | Drugs |
| Class of Worker | PW |
| Hours Worked | 28 |
| Income (1939) | 840 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Harper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Gertrude Harper (~0.92 confidence) and father William Harper (~0.92 confidence) and father William Harper (~0.92 confidence) and father William Harper (~0.92 confidence) and mother Gertrude Harper (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Gertrude Harper
b. ~1892
Source mother
● Household
· direct · ~0.92
Father
William Harper
b. ~1892
Source father
● Household
· direct · ~0.92
Father
William Harper
b. ~1892
Source father
● Household
· direct · ~0.92
Father
William Harper
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Gertrude Harper
b. ~1899
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Harper
Son · 1940 · age 24 · b. ~1916 · Missouri
★ You are viewing this record
Sibling
Alice Harper
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 — St.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02150-00580)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | A. Frenel Frenel | 57 | Head | Electrician | Kentucky |
| 42 | Imajene Frenel | 54 | Wife | — | Kentucky |
| 43 | Wendell Frenel | 22 | Son | Clerk | Missouri |
| 44 | James Frenel | 20 | Son | Delivery Boy | Missouri |
| 45 | Jean Frenel | 17 | Daughter | — | Missouri |
| 46 | Gertrude Hines | 66 | Head | — | Louisiana |
| 47 | Daniel Hines | 24 | Son | Plant Worker | Missouri |
| 48 | James Hines | 33 | Son | Gas Station | Missouri |
| 49 | Julie Charroppin | 65 | Sister | — | Louisiana |
| 50 | End Block - Begin Block | None | — | — | — |
| 51 | Allie Cape | 75 | Head | — | Missouri |
| 52 | Leonard Noraideng | 58 | Head | Maintenance | Illinois |
| 53 | Caroline Noraideng | 56 | Wife | — | Illinois |
| 54 | Etta R. Bradbury | 65 | Head | — | Illinois |
| 55 | Elizabeth Stroud | 54 | Sister | — | Illinois |
| 56 | Lottie Stroud | 52 | Sister | Clerk | Illinois |
| 57 | Robert Stroud | 19 | Nephew | New Worker | North Dakota |
| 58 | William H. Harper | 48 | Head | Druggist | Missouri |
| 59 | Gertrude Harper | 41 | Wife | — | Missouri |
| 60 | Alice Harper | 20 | Daughter | — | Missouri |
| 61 | William Harper THIS PERSON | 24 | Son | Clerk | Missouri |
| 62 | Genevieve Harper | 22 | Daughter-in-law | — | Oklahoma |
| 63 | Mary Harper | 4 | Granddaughter | — | Missouri |
| 64 | William W. Hayden | 58 | Head | Secretary | Missouri |
| 65 | Ethel G. Hayden | 52 | Wife | — | Illinois |
| 66 | Gertrude Hayden | 25 | Daughter | Model-Clerk | Missouri |
| 67 | Genevieve Hayden | 24 | Daughter | Stenographer | Missouri |
| 68 | William Hayden | 14 | Son | — | Missouri |
| 69 | Margaret Hayden | 14 | Daughter | — | Missouri |
| 70 | Arthur Deininger | 48 | Head | Bookkeeper | Missouri |
| 71 | Bertha Deininger | 52 | Sister | — | Missouri |
| 72 | William Sr. Postal | 44 | Head | Accountant | Michigan |
| 73 | Margaret Postal | 42 | Wife | — | Michigan |
| 74 | William Jr. Postal | 20 | Son | Apprentice | Michigan |
| 75 | John J. Postal | 17 | Son | — | Michigan |
| 76 | Eugene R. Postal | 11 | Son | — | Missouri |
| 77 | Marguerite Postal | 7 | Daughter | — | Missouri |
| 78 | William Betschneider | 51 | Head | Proprietor | Iowa |
| 79 | Hermine Betschneider | 51 | Wife | — | Indiana |
| 80 | William Betschneider | 20 | Son | — | Missouri |
Pedigree Summary
William + 1 sibling
Gen 1 · 5 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)