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Robert Johnston — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Humboldt, California
Our Model Tree links this Robert Johnston across the 1900, 1910 and 1920 US Censuses in Humboldt, California (XGBoost, ~Confirmed) — first a head (b.~1864), then head of a 3-person household.
Age 56
b. ~1864
Male
Head
Born: California
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Humboldt, California |
| Surname | Johnston |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Dentist |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Dentist |
| Township / Ward | Eureka City |
| Est. Birth Year | ~1864 |
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.
3 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Johnston | Head | — | 56 | ~1864 |
| Robert Johnston | Son | — | 19 | ~1901 |
| Mable Johnston | Spouse | — | 44 | ~1876 |
Census Appearances
1900
Humboldt, California
Head, age 37
Humboldt, California · implied b. ~1863 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Robert P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | California |
| Birth Month | Mar |
| Birth Year | 1863 |
| Father's Birthplace | Ireland |
| Occupation | Civil Engineer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1910
Humboldt, California
Head, age 45
Humboldt, California · implied b. ~1865 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | California |
| Years Married | 10 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | D. E. S. |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
Humboldt, California
Head, age 56
Humboldt, California · implied b. ~1864 — 3 household members
| Surname | Johnston |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Dentist |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 (1900, 1910 and 1920) in Humboldt, California, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Johnston
Head · 1920 · age 56 · b. ~1864 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Humboldt, California
Open full size
1920 US Federal Census — Humboldt, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu098unit:0828)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Josiah Ball | 82 | Head | Retired | Maine |
| 2 | Philadella Ball | 46 | Daughter | — | California |
| 3 | Harry N. Ball | 41 | Son | Yard Supt. | California |
| 4 | Pearl Smith | 19 | Maid | Maid | California |
| 5 | Margaret M. Moore | 56 | Nurse | Nurse | Ireland |
| 6 | Margaret Mclean | 73 | Head | — | Canada |
| 7 | Joseph Mclean | 42 | Son | Drayman | Canada |
| 8 | Annie E. Mclean | 32 | Daughter-in-law | — | California |
| 9 | Stewart F. Mclean | 36 | Son | Drayman | Canada |
| 10 | Eugene Mclean | 12 | Grandson | Mechanic | California |
| 11 | John H. Cormack | 74 | Head | Retired | Canada |
| 12 | Jessie M. Cormack | 55 | Cousin | — | Canada |
| 13 | George F. Hendrick | 72 | Head | Retired | California |
| 14 | Lillian L. Hendrick | 58 | Wife | — | California |
| 15 | Frank J. Hagemann | 41 | Head | Mechanic | Germany |
| 16 | Ida H. Hagemann | 41 | Wife | — | Switzerland |
| 17 | Rosalia Hagemann | 11 | Daughter | — | California |
| 18 | Marie Hagemann | 8 | Daughter | — | Montana |
| 19 | Teresia Hagemann | 4 | Daughter | — | California |
| 20 | Frederick Arimee | 42 | Head | Tailor | Indiana |
| 21 | Jennie Arimee | 40 | Wife | — | Ohio |
| 22 | W. Preston Ball | 64 | Head | Lumberman | Connecticut |
| 23 | Esther N. Ball | 63 | Wife | — | Connecticut |
| 24 | John W. Durham | 45 | Lodger | Osteopath | Arkansas |
| 25 | Carolyn Pearson | 38 | Lodger | Teacher | New York |
| 26 | Rose Logantree | 24 | Lodger | Teacher | California |
| 27 | Robert Johnston THIS PERSON | 56 | Head | Dentist | California |
| 28 | Mable Johnston | 44 | Wife | — | Missouri |
| 29 | Robert Jr. Johnston | 19 | Son | — | California |
| 30 | Nathaniel Berglund | 30 | Head | Cook | Sweden |
| 31 | Signa Berglund | 27 | Wife | — | Sweden |
| 32 | Robert W. Fulton | 75 | Head | Retired | Canada |
| 33 | Katherine Fulton | 65 | Wife | — | Canada |
| 34 | Maud Fulton | 31 | Daughter | Bookkeeper | California |
| 35 | Lillian Fulton | 25 | Daughter | Bookkeeper | California |
| 36 | Florence Fulton | 22 | Daughter | Saleslady | California |
| 37 | Lotta Fulton | 18 | Niece | Saleslady | California |
| 38 | Vernon Marean | 30 | Head | Merchant | Iowa |
| 39 | Hazel Marean | 24 | Wife | — | California |
| 40 | Mildred Marean | 2 | Daughter | — | California |
| 41 | Verna J. Marean | 1 | Daughter | — | California |
| 42 | Eugene C. Mowry | 67 | Head | Laborer | Massachusetts |
| 43 | Jane F. Mowry | 66 | Wife | — | Massachusetts |
| 44 | Nancy W. Boulster | 60 | Sister-in-law | — | Rhode Island |
| 45 | Frederick J. Bertrand | 43 | Head | Carpenter | Canada |
| 46 | Julia Bertrand | 37 | Wife | — | California |
| 47 | Lillian Bertrand | 17 | Daughter | Dressmaker | Canada |
| 48 | Alonzo A. Kellogg | 66 | Head | Bookkeeper | Illinois |
| 49 | Mabel A. Kellogg | 63 | Wife | — | California |
| 50 | Angie H. Kellogg | 40 | Daughter | Musician | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)