BP
Bertha Peterson — 1920 US Census Record
Linked across censuses1920 United States Federal Census · San Francisco, California
Our Model Tree links this Bertha Peterson across the 1920, 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a head (b.~1869), then head of a 3-person household.
Age 51
b. ~1869
Female
Head
Born: Finland
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | San Francisco, California |
| Surname | Peterson |
| Given Name | Bertha A |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Widowed |
| Birthplace | Finland |
| Year of Immigration | 1903 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Finland |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Birth Country | Finland |
| Year of Naturalization | 1909 |
| Birthplace (normalized) | finland |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1869 |
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 Bertha | Age | Birth yr |
|---|---|---|---|---|
| Carl Peterson | Son | — | 25 | ~1895 |
| Lloyd Peterson | Son | — | 21 | ~1899 |
| Bertha Peterson | Head | — | 51 | ~1869 |
Census Appearances
1920
San Francisco, …
Head, age 51
San Francisco, California · implied b. ~1869 — 3 household members
| Surname | Peterson |
| Given Name | Bertha A |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Widowed |
| Birthplace | Finland |
| Year of Immigration | 1903 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | R |
| Birth Country | Finland |
| Year of Naturalization | 1909 |
| Birthplace (normalized) | finland |
1930
Alameda, California
Other, age 61
Alameda, California · implied b. ~1869 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Bertha A. |
| Relationship to Head | Head-H |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | Finland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1903 |
| Age at First Marriage | 25 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Value / Rent | 6500 |
| Radio Set | R |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
Contra-Costa-County, California
Other, age 70
Contra-Costa-County, California · implied b. ~1870 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Berta |
| Relationship to Head | Mother |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Finland |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Naturalization Status | First papers filed |
| Highest Grade | No 8 |
| 1935 Residence | California |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Bertha Peterson across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Bertha Peterson
Head · 1920 · age 51 · b. ~1869 · 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 — San Francisco, California
Open full size
1920 US Federal Census — San Francisco, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu133unit:0475)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Douglas | 47 | Head | Finisher | Ireland |
| 2 | Rose Douglas | 36 | Wife | None | North Carolina |
| 3 | Cecil Douglas | 10 | Son | None | California |
| 4 | Grace Douglas | 5 | Daughter | None | California |
| 5 | Andrew Mantaidly | 50 | Head | Manager | France |
| 6 | Viglowne Mantaidly | 50 | Wife | None | France |
| 7 | Burtan May | 60 | Head | Master Plumber | California |
| 8 | Mathilda May | 50 | Wife | None | New York |
| 9 | Hannah Full | 45 | Head | None | Ireland |
| 10 | Henry Bohn | 72 | Head | Tailor | Germany |
| 11 | Dorothy Bohn | 71 | Wife | None | Germany |
| 12 | Frederick A O'Sullivan | 60 | Head | Tailor | Maine |
| 13 | Theresa O'Keeley | 35 | Head | Seamstress | Nevada |
| 14 | John V O'Keeley | 10 | Son | None | California |
| 15 | Olin | 38 | Roomer | Operator | Sweden |
| 16 | Bertha A Peterson THIS PERSON | 51 | Head | None | Finland |
| 17 | Carl J Peterson | 25 | Son | Machinist | Finland |
| 18 | Lloyd Peterson | 21 | Son | Machinist | Finland |
| 19 | John H Irvine | 48 | Head | Machinist | Illinois |
| 20 | Rose Irvine | 48 | Wife | None | Canada |
| 21 | William V Joyce | 28 | Head | Inspector | California |
| 22 | Frances Joyce | 25 | Wife | None | California |
| 23 | Frances Joyce | 2 | Daughter | None | California |
| 24 | James A Joyce | 26 | Brother | Teamster | California |
| 25 | Sigurd Hannewig | 36 | Head | Mate | Illinois |
| 26 | Jenny Hannewig | 36 | Wife | None | Norway |
| 27 | Evelyn Hannewig | 4 | Daughter | None | Washington |
| 28 | Eloise Hannewig | 2 | Daughter | None | Washington |
| 29 | Fred Fox | 33 | Head | Oiler | Iowa |
| 30 | Hilda Fox | 32 | Wife | None | Finland |
| 31 | Harriet M Fox | 5 | Daughter | None | California |
| 32 | Helen G Fox | 1 | Daughter | None | California |
| 33 | Nicolis Fox | 85 | Father | None | Germany |
| 34 | Frank Norton | 68 | Head | Helper | California |
| 35 | Catherine Norton | 48 | Wife | Janitress | Ireland |
| 36 | James Mitchel | 47 | Head | Electrician | California |
| 37 | Anna Mitchel | 43 | Wife | Vegetable Helper | California |
| 38 | Karl Mitchel | 14 | Son | None | California |
| 39 | Catherine Studdert | 42 | Head | None | California |
| 40 | Charles H Studdert | 14 | Son | None | California |
| 41 | Raymond Brown | 27 | Roomer | Draftsman | Nevada |
| 42 | George Grillon | 24 | Roomer | Clerk | California |
| 43 | Dorothy Grillon | 24 | Roomer | Stenographer | Nevada |
| 44 | William Wyatt | 37 | Head | Watchman | England |
| 45 | Florence Wyatt | 33 | Wife | Operator | Ohio |
| 46 | Margaret Wyatt | 13 | Daughter | None | Ohio |
| 47 | Donald Wyatt | 11 | Son | None | Ohio |
| 48 | Phyllis Wyatt | 10 | Daughter | None | Ohio |
| 49 | Thomas T Ryan | 53 | Head | Clerk | California |
| 50 | Clara B Ryan | 53 | Wife | None | Indiana |
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)