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Marjorie Williams — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Marjorie Williams across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Williams |
| Given Name | Marjorie Ann |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Dormont Borough |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Dormont Borough |
| Est. Birth Year | ~1929 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Marjorie | Age | Birth yr |
|---|---|---|---|---|
| Laura Williams | Daughter | — | 13 | ~1927 |
| Elizabeth Mcdade | Other | — | 77 | ~1863 |
| Betty Williams | Daughter | — | 20 | ~1920 |
| Isabel Williams | Son | — | 19 | ~1921 |
| Blanche Williams | Spouse | — | 49 | ~1891 |
| Russell Williams | Head | — | 48 | ~1892 |
| Marjorie Williams | Daughter | — | 11 | ~1929 |
| Ruth Williams | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Allegheny, Pennsylvania
Daughter, age 1
Allegheny, Pennsylvania · implied b. ~1929 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Marjorie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 11
Allegheny-County, Pennsylvania · implied b. ~1929 — 8 household members
| Surname | Williams |
| Given Name | Marjorie Ann |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Dormont Borough |
| 1935 Residence (County) | Allegheny |
| Income (1939) | 0 |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| 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 Marjorie Williams across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Marjorie Williams
Daughter · 1940 · age 11 · b. ~1929 · Pennsylvania
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Sibling
Ruth Williams
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laura Williams
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Williams
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabel Williams
Sibling · 1940 · age 19
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-t0627-03401-00831)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert J. Moore | 16 | son | — | Ohio |
| 2 | Jane Ann Moore | 8 | daughter | — | Ohio |
| 3 | Charles Oliver Moore | 6 | son | — | Ohio |
| 4 | William Frederick Moore | 2 | son | — | Ohio |
| 5 | John Wesley Post | 51 | head | Physician | New York |
| 6 | Leah E. Post | 48 | wife | — | New York |
| 7 | John W. Jr. Post | 20 | son | — | Pennsylvania |
| 8 | Marion Ruth Post | 16 | daughter | — | Indiana |
| 9 | Robert Frank Post | 12 | son | — | Ohio |
| 10 | Ellie Keller | 41 | head | Training Supervisor | Pennsylvania |
| 11 | Marguerite Keller | 34 | wife | — | Pennsylvania |
| 12 | Anne Keller | 14 | daughter | — | Pennsylvania |
| 13 | Robert Keller | 12 | son | — | Pennsylvania |
| 14 | Betty Letitia Keller | 11 | daughter | — | Pennsylvania |
| 15 | Margherite Keller | 9 | daughter | — | Pennsylvania |
| 16 | Russell J. Williams | 48 | head | Butcher | Pennsylvania |
| 17 | Blanche E. Williams | 49 | wife | — | Pennsylvania |
| 18 | Betty Williams | 20 | daughter | Stenographer | Pennsylvania |
| 19 | Isabel Williams | 19 | son | Clerk | Pennsylvania |
| 20 | Ruth Mae Williams | 15 | daughter | — | Pennsylvania |
| 21 | Laura Jean Williams | 13 | daughter | — | Pennsylvania |
| 22 | Marjorie Ann Williams THIS PERSON | 11 | daughter | — | Pennsylvania |
| 23 | Elizabeth Mcdade | 77 | mother | — | Pennsylvania |
| 24 | — | None | — | — | — |
| 25 | Pierre F. Wilhelm | 42 | head | Manager | West Virginia |
| 26 | Marie G. Wilhelm | 42 | wife | — | Maryland |
| 27 | James F. Wilhelm | 15 | son | — | Pennsylvania |
| 28 | Joseph A. Wilhelm | 14 | son | — | Pennsylvania |
| 29 | Marie A. Wilhelm | 11 | daughter | — | Pennsylvania |
| 30 | David G. Wilhelm | 6 | son | — | Pennsylvania |
| 31 | Frank L. Trapp | 46 | head | Salesman | Pennsylvania |
| 32 | Mary M. Trapp | 39 | wife | — | Pennsylvania |
| 33 | Frank A. Trapp | 17 | son | — | Pennsylvania |
| 34 | Robert S. Trapp | 15 | son | Newsboy | Pennsylvania |
| 35 | Donald C. Trapp | 11 | son | — | Pennsylvania |
| 36 | Edward L. Trapp | 2 | son | — | Pennsylvania |
| 37 | Clara Cornell | 51 | head | — | Pennsylvania |
| 38 | James Roscoe | 29 | head | Clerk | Pennsylvania |
| 39 | Ina Roscoe | 28 | wife | Nurse | Pennsylvania |
| 40 | George Melvie | 49 | head | Auditor | 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)