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Robert Williamson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Ohio
Our Model Tree links this Robert Williamson across the 1930 and 1940 US Censuses in Marion-County, Ohio (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Ohio |
| Surname | Williamson |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Marion city |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Marion City |
| Est. Birth Year | ~1930 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Fred Williamson | Son | — | 3 | ~1937 |
| Paul Williamson | Son | — | 5 | ~1935 |
| Ruth Williamson | Daughter | — | 9 | ~1931 |
| Philip Williamson | Head | — | 37 | ~1903 |
| Mary Williamson | Daughter | — | 12 | ~1928 |
| David Williamson | Son | — | 13 | ~1927 |
| Robert Williamson | Son | — | 10 | ~1930 |
| Audrey Williamson | Spouse | — | 34 | ~1906 |
Census Appearances
1930
Marion, Ohio
Son, age
Marion, Ohio · implied b. ~1930 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williamson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | No |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Marion-County, Ohio
Son, age 10
Marion-County, Ohio · implied b. ~1930 — 8 household members
| Surname | Williamson |
| Given Name | Robert |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Marion city |
| 1935 Residence (County) | Marion |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Robert Williamson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Williamson
Son · 1940 · age 10 · b. ~1930 · Ohio
★ You are viewing this record
Sibling
David Williamson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Williamson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Williamson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Williamson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Williamson
Sibling · 1940 · age 3
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 — Marion-County, Ohio
Open full size
1940 US Federal Census — Marion-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03110-00602)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Virginia Van Houten | 1 | daughter | — | Ohio |
| 2 | George Dett | 32 | Head | Mechanic | Ohio |
| 3 | Isabel Dett | 29 | wife | Waitress | Colorado |
| 4 | Ray Van Swearingen | 58 | father | Nickel Plating | Colorado |
| 5 | Mildred Van Swearingen | 52 | mother | — | Colorado |
| 6 | Clinton Willey | 32 | Head | Electrician | Ohio |
| 7 | Thelma Willey | 32 | wife | — | Ohio |
| 8 | Marjory Ann Willey | 5 | daughter | — | Ohio |
| 9 | Paul Edward Willey | 3 | son | — | Ohio |
| 10 | Elmer S Moore | 50 | Head | Brakeman | Ohio |
| 11 | Lena Moore | 49 | wife | — | Ohio |
| 12 | Laman Alspach | 44 | Head | Helper | Ohio |
| 13 | Bertha Alspach | 45 | wife | — | Ohio |
| 14 | Charles Alspach | 67 | father | — | Ohio |
| 15 | John M. Jr. Powell | 56 | Head | Clerk | Ohio |
| 16 | Gertie M Powell | 48 | wife | — | Ohio |
| 17 | Sherman S Powell | 29 | son | Advertising Salesman | Ohio |
| 18 | Irene Powell | 18 | daughter | News Worker | Ohio |
| 19 | Charles H. Myers | 25 | Head | Machinist | Ohio |
| 20 | Alice Myers | 24 | wife | — | Ohio |
| 21 | Leo Haycox | 29 | Head | Bartender | Ohio |
| 22 | Elinor Haycox | 26 | wife | Housework | Ohio |
| 23 | Philip Williamson | 37 | Head | Pattern Clerk | Ohio |
| 24 | Audrey Williamson | 34 | wife | — | Ohio |
| 25 | David Williamson | 13 | son | — | Ohio |
| 26 | Mary Williamson | 12 | daughter | — | Ohio |
| 27 | Robert Williamson THIS PERSON | 10 | son | — | Ohio |
| 28 | Ruth Williamson | 9 | daughter | — | Ohio |
| 29 | Paul Williamson | 5 | son | — | Ohio |
| 30 | Fred Williamson | 3 | son | — | Ohio |
| 31 | Nathan Piatt | 64 | Head | Fireman On Trucks | W. Virginia |
| 32 | Fanny Piatt | 59 | wife | — | W. Virginia |
| 33 | Max Wilbraver | 52 | Head | Seamstress | Ohio |
| 34 | James Sloop | 24 | son | — | Ohio |
| 35 | Lawson White | 22 | Head | Helper Mechanic | Ohio |
| 36 | Millie White | 25 | wife | — | Ohio |
| 37 | Doris Lee White | 1 | daughter | — | Ohio |
| 38 | Charles Henry | 54 | Head | Laborer In Charge | Ohio |
| 39 | Sadie Henry | 53 | wife | — | Ohio |
| 40 | Charles Earhart | 37 | Head | Electrician | Indiana |
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)