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Robert Johnston — 1930 US Census Record
Model Tree available1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Robert Johnston across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed), with identified parents Clara & Victor — first a son (b.~1915), then head of a 5-person household.
Age 15
b. ~1915
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Johnston |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1915 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Johnston | Daughter | — | 17 | ~1913 |
| Victor Johnston | Head | — | 51 | ~1879 |
| Nina Henry | Other | — | 21 | ~1909 |
| Robert Johnston | Son | — | 15 | ~1915 |
| Clara Johnston | Spouse | — | 54 | ~1876 |
Census Appearances
1920
Cook, Illinois
Son, age 4
Cook, Illinois · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 15
Cook, Illinois · implied b. ~1915 — 5 household members
| Surname | Johnston |
| Given Name | Robert E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Other, age 25
Cook-County, Illinois · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnstone |
| Given Name | Robert N. |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Salesman |
| Industry | Industrial |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Clara Johnston (~0.92 confidence) and father Victor Johnston (~0.92 confidence) and father Fred Johnston (~0.92 confidence) and mother Marie Johnston (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Clara Johnston
b. ~1876
Source mother
● Household
· direct · ~0.92
Father
Victor Johnston
b. ~1879
Source father
● Household
· direct · ~0.92
Father
Fred Johnston
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Marie Johnston
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Johnston
Son · 1930 · age 15 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Dorothy Johnston
Sibling · 1930 · age 17
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
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel443:0480)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William G. Amsden | 5 | Son | — | Illinois |
| 2 | Harlan C. Amsden | 4 | Son | — | Illinois |
| 3 | George A. Vaushen | 26 | Roomer | Conductor | Wisconsin |
| 4 | Victor I. Johnston | 51 | Head | Clerk | Sweden |
| 5 | Clara A. Johnston | 54 | Wife | — | Illinois |
| 6 | Dorothy A. Johnston | 17 | Daughter | — | Illinois |
| 7 | Robert E. Johnston THIS PERSON | 15 | Son | — | Illinois |
| 8 | Nina A. Henry | 21 | Roomer | Typist | Michigan |
| 9 | Charles J. Nelson | 65 | Head | Conductor | Sweden |
| 10 | Ella R. Nelson | 64 | Wife | — | New York |
| 11 | Franklin Hess | 60 | Head | At Law | Illinois |
| 12 | Rilla M. Hess | 63 | Wife | — | Illinois |
| 13 | Ernest J. Housennecht | 50 | Head | Salesman | New York |
| 14 | Anna G. Housennecht | 46 | Wife | — | New York |
| 15 | Ernestine J. Housennecht | 24 | Daughter | Sales Girl | New York |
| 16 | Doris A. Housennecht | 20 | Daughter | Teacher | New York |
| 17 | Ernest W. Housennecht | 10 | Son | — | Illinois |
| 18 | Bell T. Rapp | 23 | Roomer | Splicer | Illinois |
| 19 | Frank J. Norton | 19 | Roomer | Lineman | Illinois |
| 20 | Edward N. Pierce | 20 | Roomer | Chauffeur | Illinois |
| 21 | Arthur E. Harms | 33 | Head | — | Illinois |
| 22 | Lena S. Harms | 32 | Wife | — | Pennsylvania |
| 23 | Henry Baker | 35 | Roomer | Chauffeur | Holland |
| 24 | Henry C. Baker | 14 | Roomer | — | Illinois |
| 25 | Francis H. Baker | 11 | Roomer | — | Illinois |
| 26 | Ruth L. Baker | 4 | Roomer | — | Illinois |
| 27 | Elizabeth Kelemen | 20 | Roomer | Operator | Michigan |
| 28 | Harry J. Coleman | 37 | Head | Mechanic | Illinois |
| 29 | Winifred M. Coleman | 32 | Wife | — | New York |
| 30 | Harold M. Coleman | 10 | Son | — | Illinois |
| 31 | Edward E. Coleman | 9 | Son | — | Michigan |
| 32 | William A. Fiss | 25 | Head | Mill Wright | Illinois |
| 33 | Emily S. Fiss | 20 | Wife | Binder | Missouri |
| 34 | George H. Smith | 39 | Head | Chief Clerk Comptroller | Illinois |
| 35 | Mary B. Smith | 40 | Wife | — | Illinois |
| 36 | Leonore B. Smith | 13 | Daughter | — | Illinois |
| 37 | Edward Kennefick | 52 | Head | Clerk | Ireland |
| 38 | Mary Kennefick | 47 | Wife | — | Connecticut |
| 39 | Mary Kennefick | 28 | Daughter | Operator | Illinois |
| 40 | Hellen C. Kennefick | 26 | Daughter | Operator | Illinois |
| 41 | Grace Kennefick | 24 | Daughter | Operator | Illinois |
| 42 | William Kennefick | 16 | Son | — | Illinois |
| 43 | Robert Kennefick | 14 | Son | — | Illinois |
| 44 | Jane M. Kennefick | 9 | Daughter | — | Illinois |
| 45 | Benjamin F. Howard | 57 | Head | Broker | Illinois |
| 46 | Edna I. Howard | 50 | Wife | — | Illinois |
| 47 | Arthur E. Howard | 24 | Son | Assistant Manager | Illinois |
| 48 | Clyde R. Davis | 23 | Roomer | Book Keeper | Illinois |
| 49 | Edward D. Bradley | 55 | Head | Sales Engineer | Illinois |
| 50 | Winifred O. Bradley | 50 | Wife | — | Michigan |
Pedigree Summary
Robert + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)